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  1. Running some numbers for the SuperHeavy+Starship launcher, I was surprised to get that an expendable SuperHeavy alone could be SSTO with quite high payload. Wikipedia gives the propellant mass of the SuperHeavy as 3,400 tons, but does not give the dry mass. We can do an estimate of that based on information Elon provided in a tweet: Elon Musk @elonmusk Replying to @Erdayastronaut and @DiscoverMag Probably no fairing either & just 3 Raptor Vacuum engines. Mass ratio of ~30 (1200 tons full, 40 tons empty) with Isp of 380. Then drop a few dozen modified Starlink satellites from empty engine bays with ~1600 Isp, MR 2. Spread out, see what’s there. Not impossible. 9:14 PM · Mar 29, 2019·Twitter for iPhone 90 Retweets 32 Quote Tweets 1,498 Likes https://twitter.com/elonmusk/status/1111798912141017089?s=20&t=L-xcKvWnRTmbSDa_YI0OyA This is for a stripped down Starship, no reusability systems, no passenger quarters, and reduced number of engines. But this could not lift-off from ground because of the reduced thrust with only 3 engines plus being vacuum optimized these could not operate at sea level. So up the number of engines to 9 using sea level Raptors. According to wiki the Raptors have a mass of 1,500 kg. So adding 6 more brings the dry mass to 49 tons, call it 50 tons, for a mass ratio of 25 to 1. By the way, there have been many estimates of the capabilities of the Starship for a use other than that with the many passengers, say 50 to 100 , to LEO or as colonists to Mars, for instance, such as the tanker use or only as the lander vehicle transporting a capsule for astronauts for lunar missions. But surprisingly they all use the ca. 100 ton dry mass of the passenger Starship. But without this large passenger compartment it should be a much smaller dry mass used in the calculations. For instance, the Dragon 2 crew capsule dry mass without the trunk is in the range of 7 to 8 tons for up to 7 astronauts. So imagine a scaled up passenger compartment for 50 passengers or more. That passenger compartment itself could well mass over 60 tons. So the dry mass estimate of a stripped down, expendable, reduced engine Starship of 40 tons offered by Elon does make sense. Based on this, an expendable Starship with sufficient engines for ground launch could be SSTO: the ISP of the Raptors for both sea level and vacuum-optimized versions have been given various numbers. I’ll use 358 s as the vacuum ISP of the sea level Raptor. For calculating payload using the rocket equation, the vacuum Isp is commonly used even for the ground stage, since the diminution in Isp at sea level can be regarded as a loss just like air drag and gravity loss for which you compensate by adding additional amount to required delta-v to orbit just like the other losses. Then 3580ln(1 +1200/(50 + 50)) = 9,180 m/s sufficient for LEO. But as of now, SpaceX has no plans of making the Starship a ground-launched vehicle. So we’ll look instead at the SuperHeavy. For an expendable version with no reusability systems, we’ll estimate the dry mass using a mass ratio of 25 to 1, same as for a ground-launched expendable Starship. Actually, likely the Superheavy mass ratio will be even better than this since it is known scaling a rocket up improves the mass ratio. So this gives a dry mass of 136 tons. Then the expendable SuperHeavy could get 150 tons to LEO as an expendable SSTO: 3580ln(1 + 3,400/(136 + 150)) = 9,150 m/s, sufficient for LEO. But what about a reusable version? Reusability systems added to a stage should add less than 10% to the dry mass: ________________________________________________________________________________________________________________ From: [email protected] (Henry Spencer) Newsgroups: sci.space.tech Subject: Re: The cost (in weight) for Reusable SSTO Date: Sun, 28 Mar 1999 22:37:10 GMT In article <[email protected]>, Larry Gales <[email protected]> wrote: >An SSTO with a useful payload using Kero/LOX is easy to do -- provided that >it is *expendable*. All of the difficulty lies in making it reusable... There are people who are sufficiently anti-SSTO that they will dispute the feasibility of even expendable SSTOs (apparently not having read the specs for the Titan II first stage carefully). > (1) De-orbit fuel: I understand that it takes about 100 m/s to de-orbit. That's roughly right. Of course, in favorable circumstances you could play tricks like using a tether to simultaneously boost a payload higher and de-orbit your vehicle. (As NASA's Ivan Bekey pointed out, this is one case where the extra dry mass of a reusable vehicle is an *advantage*, because the heavier the vehicle, the greater the boost given to the payload.) > (2) TPS (heat shield): the figures I hear for this are around 15% of the >orbital mass Could be... but one should be very suspicious of this sort of parametric estimate. It's often possible to beat such numbers, often by quite a large margin, by being clever and exploiting favorable conditions. Any single number for TPS in particular has a *lot* of assumptions in it. > (4) Landing gear: about 3% Gary Hudson pointed out a couple of years ago that, while 3% is common wisdom, the B-58 landing gear was 1.5%... and that was a very tall and mechanically complex gear designed in the 1950s. See comment above about cleverness. I would be very suspicious of any parametric number for landing gear which doesn't at least distinguish between vertical and horizontal landing. > (5) Additional structure to meet loads from differnet directions (e.g., >vertical > takeoff, semi-horizontal re-enttry, horizontal landing). This is >purely > guesswork on my part, but I assume about 8% Of course, here the assumptions are up front: you're assuming a flight profile that many of us would say is simply inferior -- overly complex, difficult to test incrementally, and hard on the structure. >I would appreciate it if anyone could supply more accurate figures. More accurate figures either have to be for a specific vehicle design, or are so hedged about with assumptions that they are nearly meaningless. -- The good old days | Henry Spencer [email protected] weren't. | (aka [email protected]) https://yarchive.net/space/launchers/landing_gear_weight.html The 15% mentioned for thermal protecton(TPS) is for Apollo-era heat shields. But the PICA-X developed by SpaceX is 50% lighter so call it 7.5% for TPS. And for the landing gear ca. 3%, but with carbon composites say half of that at 1.5%. But this would put the reusable payload at ca. 136 tons which is in the range of 100 to 150 tons of the full two stage reusable vehicle! How is that possible? A reusable multistage vehicle has a severe disadvantage. The fuel that needs to be kept on reserve for the first stage to slow down and boost back to the launch site subtracts greatly from the payload possible. But for a reusable SSTO it can remain in orbit until the Earth rotates below until the landing site is once again below the vehicle. Robert Clark
  2. my spaceplane is constantly going retrograde if it is above 60m/s making it impossible to take off the mass center is in front of the lift center solved the mass center should be behind the lift center
  3. so im wanting to make a non KAL spaceplane but that means that i should not use fuel consuming "S3 Vector" engines. and that makes the speed of the plane not enough to achieve aerodynamic stability(the combination of forces that make missiles turn prograde and reentry pods retrograde) how can i fly without aerodynamic stability?
  4. The Aeris 4A is a reasonably capable SSTO spaceplane, able to do a Mun or Minmus flyby, or even go interplanetary with proper gravity assists. It can also dock with other Aeris 4A. How far can you take one? You could try to fly a single Aeris 4A but might not make it too far. However, using one as a fuel tanker is an option...
  5. This is another mission done quite a while ago, not so much time after heat shield magic wings were indepedantly discovered by several players. In terms of mission finish time, it was the first craft of its kind to complete a full mission of any sort, as well as the first EC powered ssto. These kind of SSTOs are remarkably efficient in terms of getting into orbit, reaching at least 30% of effective payload fraction launching from Earth with a still acceptable thrust to weight ratio, and without any crazy mass optimisations. They are also ideal for tackling atmospheric bodies with high dv needs and mid to moderately high gravity levels. With this kind of basic setup, stock super-kerbins, super-jools, real scale Earth sized planets lacking oxygen, real scaled superearths and some real scale gas giants(fine for at least the dv requirements of Saturn) and super-scale terrestrial planets, at leasts up to 10xearth, can be orbited single staged, with various level of difficulty.
  6. Description The Blue Comet has its history debuting back in early 3480 A.E in the war against The Zxatan Imperium. One of the many heroes of the war, Zack Fireball Kerman and his trusty T-9 Specter. While this craft was feared for being a stealthy infiltration, he was known to show off with his flashy blue with reflective polished steel and signature Fireball. Flight Controls Action Groups Throttle - ascending kraken drive Full throttle - take-off (keep on to reach space) Half throttle - descending hover mode AG1 forward thrust kraken drive AG2 control from the command chair AG3 control from the probe unit AG4 open canopy Every time before the flight it will be controlled by default from the Probe unit tied to (action group 3) Press Radial Out and then throttle up to ascend with the vertical lifting Kraken drive. After you have achieved your desired altitude you can lower to half throttle to have a slow hover descend. When you are floating mid-air engage the forward thrust Kraken drive (action group 1) to achieve forward flight. Press (action group 2) to Control from your command chair and deselect Radial Out. Remain in half throttle and fly around in the atmosphere or fly off-planet. Adjust throttle for hovering on other planetary bodies. STOCK REQUIRES DLC DOWNLOADS Steam https://steamcommunity.com/sharedfiles/filedetails/?id=2734498805&searchtext= Kerbal X https://kerbalx.com/InterstellarKev/Blue-Comet Downloads for flags that are needed https://www.dropbox.com/s/23w6n1w8zvstdhl/bluecomet.zip?dl=0 https://drive.google.com/file/d/1BliF2g_CnBmm3v4vicypfMlvxJoM-kfi/view?usp=sharing
  7. "Kerbal Aircraft Reactor Experiment" The KARE package is here, meeting the people's need for a suite of high performance atomic jet engines. License: CC-BY-NC-SA 4.0 DOWNLOAD :: SPACEDOCK :: GITHUB
  8. I recently edited out the clips of a mission done one and a half years ago. While there are claims of fully reusable lunar missions done with stock parts predating this mission way back, they relied on splitting the timeline during stage separation, so in their respective timeline, either the booster crashes, or the payload never reaches orbit. To my knowledge, this was the first stock craft, based on mission finish date, able to finish a fully reusable mission beyond LEO in RSS(there is a interplanetary SSTO launched earlier, but I only managed to finish the mission after this was done due to a mission extension and some complications with the Kraken). It was based off of some earlier sstos, being scaled down to basically just be able to get up to leo with the lunar lander., so payload fraction wasn't high, just below 2%(at least 4.2% can be attained on large, stock part conventional wing sstos in RSS). The three solar panels were clipped into two, solar panels don't occlude each other from sunlight in this scenario. As for the mass, this mission was done before I along with others discovered magic wings, if this was done now, the mass would be way lower, probably around 2t, which I might explore in the future. Magic or conventional, there is a lot of design space and optimisation to explore with stock SSTOs in RSS.
  9. (which is better in a duel ..) So the CR-7 R.A.P.I.E.R. engine is emulating the - ever in development - SABRE engine. Seeing that with it an SSTO is quite possible in KSP, you have to wonder some things - What would be the $/Kg to orbit of a plane with SABRE? Is it so much better than SpaceX's Starship? (since neither exists let's use glossy brochures to make comparisons ..) - Would a platform like Virgin Orbit benefit from SABRE technology - on either of the two stages I need to know that my Kerbal SSTO is not for nothing!
  10. As one can tell, Matt Lowne did a video showcasing a Laythe SSTO with 4025 m/s dV in LKO. So my challenge will be, can you do better? Could you make the most out of as little dV as possible? Here are the rules: ---------------------------------------------------------------------------------------------------------------------------------------------- 1) No dirty cheating alpacas (no debug menu) 2) You must have either a video or a full album of the mission 3) KER must be installed 4) No mods (besides KER) 5) You must show the Resource Tab always if you make a video 6) You must bring at least 10 passengers with 2 pilots to Laythe and back 7) Finally, you have to have clear knowledge of gravity assists ---------------------------------------------------------------------------------------------------------------------------------------------- Leaderboard: 1st place: @herbal space program, 3390 m/s (Yay, you get your first badge) 2nd place: @Matt Lowne, 4025 m/s 3rd place: @Firemetal, 6250 m/s ---------------------------------------------------------------------------------------------------------------------------------------------- So build away, intrepid builders. May the Best SSTO win! ---------------------------------------------------------------------------------------------------------------------------------------------- Oh yeah, anyone who at least beat Matt's score gets a badge (WIP).
  11. Asclepius v5.0 A new Kopernicus planet (and moon) for KSP! Video by Jacob Plays Some Games If you've been to 1 Island on Laythe, you've been to them all... Do you need a new, fun, and exciting destination for your fleet of SSTO spaceplanes? Look no further my friend. Asclepius is a small, sandy, and fissured world, possessing a very thin oxygen atmosphere that only gets thick enough for planes to fly (or chutes to work ) deep in the canyons. Asclepius is meant to be a "low memory footprint" planet pack that even a potato computer can run. Features: 1 planet (Asclepius) & 1 moon (Kruel) Science definitions included Full career game support 11 unique biomes Stock ore generation supported Asclepius WIKI Check out the Asclepius Wiki for detailed information! Requires Kopernicus Download Options: Download via CKAN ____________________________________________ Github: Asclepius Release Page AsclepiusV5-0.zip AsclepiusV4-0.zip AsclepiusV3-0.zip JUST Asclepius! NO DEPENDENCIES! * Source ____________________________________________ PLEASE BE ADVISED: ASCclouds.cfg requires the original EVE configs to work! IF YOU ARE HAVING PROBLEMS GETTING THE PLANET TO LOAD WITH OTHER CONFIGURATIONS, REMOVE ASCclouds.cfg Asclepius includes CUSTOM compatibility patches for the following mods:(see links for D/L) Galactic Neighborhood - Puts Asclepius in orbit of a nearby star called Tyfon! E.V.E - Add clouds! Distant Object Enhancement bis- See planets and orbiting ships! Like real life! FarOut Contract Pack - Adds custom contracts like the Kessler run. (Requires Contract Configurator) Also adds bases to launch stuff from. (requires Kerbal Konstructs, and Kerbin-Side) Contract Configurator - Adds custom contracts, Including Kessler canyon run, and Rescue entire WORKING crafts!, and more! Dmagic Orbital Science - For even MORE custom science! New Horizons - Puts Asclepius on a co-orbital configuration with Laythe. Final Frontier - Ribbons included! Research Bodies - Spend science points to "discover" planets! Planetshine - Adds customized ambient lighting! Give it a try, and let me know your suggestions on how to make it better, and other opinions. Report any bugs here, and I'll do my best to squash them. Enjoy uh-sklee-pee-uh s < Click to hear!
  12. lemon cup's Stellar Frontier Initiative presents... PROJECT STARPOWER - Combining Kerbin's many sectors of industrial might with years of trailblazing research and experimentation in the field of nuclear fusion propulsion. STARPOWER aims to do what has never been done in the history of Kerbalkind, and do so with the utmost ambition and intrepidity: Harness the latest in fusion drive technology to send a crew of 6 brave kerbonauts to the surface of Laythe, and back, in under 6 months. CONTENTS Introduction Part 1: Pre-Mission Part 2: Departure Part 3: Arrival Part 4: Landing Part 5: Return Part 6: Home Epilogue: The Future Introduction PREFACE This is a somewhat straightforward mission to Laythe with a few twists and heavy emphasis on realism, or rather, what could be reasonably assumed to occur and what obstacles (some huge) would have to be overcome. I couldn't make up my mind on how hard to go with this, so I figured I'd go all in! Expect detailed explanations, real-world science, tons of pictures, and the unwitting Kerbal perspectives on such matters. That being said I will do my best to keep fluff to a minimum, and content rolling in thick. MOD LIST Lots...I won't list them all! Rather I will list the ones that feature prominently here in plain sight. Those that reside beneath the surface, I will mention throughout if I think it to be relevant. In order of significance: JNSQ - the astounding community-favorite planet pack, where this all takes place. Far Future Technologies(beta) - provides all of the theoretical nuclear propulsion aspects that make this mission possible; Nertea just dropped the 1.0 release for download. Near Future Technologies (full suite) - I think of this as the de facto expansion pack to KSP as I know it, adds incredible depth and utility parts for advanced spaceflight and features heavily on this mission. OPT Spaceplane - used to craft the Mk.III-J "Shadowfax," the mission's interplanetary SSTO. Restock - revamped models for every stock part, meshes flawlessly with NFT and other mods. Kerbal Atomics - nuclear fission reactors and advanced NTR rockets CryoEngines/Tanks - adds hydrolox and methalox engines and tankage SSPXR - Stockalike Station Parts Expansion Redux adds the large hab modules you'll see here. Kerbal Konstructs - you will occasionally see some decorative infrastructure, thanks to this mod. Visual Mods include: EVE, Scatterer, TUFX, DistantObjectEnhancements, and Planetshine Some QOL mods: MechJeb, KerbalEngineerRedux, BetterTimeWarp, PersistentThrust, Kerbal Joint Reinforcement, Tweakscale, RCS Build Aid, EditorExtensionsRedux, and more... AND LASTLY, playing in KSP 1.10.1, let's get started. STELLAR FRONTIER INITIATIVE Excelling where previous space programs have failed, SFI was founded to put a stop to repetitive gameplay mission architecture centered in Low Kerbin Orbit. Instead of wasting excess time, resources, and funds at the behest of corrupt save files administration changes and economic lulls, SFI is the result of a joint venture between many Kerbal nations to go to the Mun, Duna, and beyond, and this time for good. Many strides have been made in the past 3 decades. We've researched much science, completed many contracts, and earned much reputation. Also we took some pretty pictures. Over the last 10 years, breakthroughs in rocket propulsion and particle physics has led to a boom in the exploration of parts unknown. I'm playing in JNSQ, where planets are 2.7x the size and even further away from each other. A minimum-energy Hohmann transfer to the Mun takes 4 days. To Duna takes almost 9 months, and beyond that, years. The reality is, Kerbals don't live such a long time, being the little frog men that they are, and that would be cut even shorter should they be exposed to the harsh radiation of interplanetary space for such long durations. Of keen interest to Kerbalkind is Laythe, the crown jewel of, erm... Jool. Before now, it has been held beyond our reach by vast gulfs of time and space, accessible only by our long range probes. But this, is the Fusion era! Behold the latest in experimental atmospheric probes designed to study Laythe and identify areas of interest for future exploration teams. Nicknamed the "Blindwolf," it is both a high-concentration test bed, and a valuable research platform. It is able to convert superheated air into reaction mass via a state of the art high-powered electromagnetic ramjet, and a compact spherical Deuterium-Deuterium powerplant generates the electricity necessary to do so. Top speed is limited only by the melting point of the skin. As it tears through Laythe's atmosphere, it is able to send back telemetry on a particularly optimal equatorial island, with ample flats for a landing... All that's left to do is assemble the vessel, the crew and their vehicle, and the resources needed to get them there. Easy, right?
  13. Description Dual Seat VTOL SSTO Interceptor the KDF - Dragonfly Using Kraken Technology for thrust and anti-gravity applications. Craft can go anywhere in the Kerbol System. Flight Instructions Toggle AG5 for Yaw Control and Stabilization during flight. Full Throttle for anti-gravity VTOL AG1: Forward Thrust AG3: Open Canopy AG4: Toggle Air Break AG5: Toggle Dragonfly Wings AG6: Toggle Plasma Cannons Requires Flags to complete the look https: A stock aircraft called KDF Dragonfly. Built with 474 of the finest parts, its root part is strutCube. Built in the SPH in KSP version 1.12.3. Details Type: SPH Class: spaceplane Part Count: 474 Pure Stock KSP: 1.12.3 EDITS Press stage (space) to fire cannons Requires Flags to complete the look https://www.dropbox.com/s/a3agltlbe2ohz6h/Dragonfly.zip?dl=0 https://drive.google.com/file/d/1JUL0j9MJGzaAxN-b1IRO55clAlJ2aId_/view?usp=sharing DOWNLOAD LINKS https://kerbalx.com/InterstellarKev/KDF-Dragonfly
  14. Pretty much stated in the title. I've had several cracks at it; it just seems to be impossible. The only engine that can provide the dV needed is the NERV, but with the low TWR it doesn't seem feasible without weird aero bug exploitation to get insane altitude and speed without spending fuel. Any ideas or theories? EDIT: Just thought of suborbital rendezvous, but I think TWR would still be a significantly limiting factor.
  15. This is a mission I have been thinking about for a long time, but I haven't gotten around to actually flying it until recently. Flying from Kerbin's surface to Laythe's surface and back three times is at the very edge of what a liquid fuel only SSTO craft can accomplish. Consequently, this is the first mission I've flown that required close to optimal piloting, and a lot of quicksaves and reloads. I use no ISRU, no docking or refueling, no part detachment shenanigans. This is a purist single stage craft that I fly as far as it can go. I don't use ion engines either, because I don't like ions - they're a hassle to work with. If I were to use ions, I might possibly be able to do a fourth landing, but I'm not willing to try it. Note that the Laythe Star is not quite at the peak performance of a liquid fuel craft. I've had better performance with three Rapiers and two Nervs for a 105 ton plane. However, the part count means that landings and takeoffs have to be done at quite a low frame rate, and vacuum TWR will be lower, requiring more periapsis kicks. In other words, it would be a lot less fun to fly, and the plane as-is can pull off the mission. Stats of the mission: The craft is composed of a Rapier and a Nerv, as well as six strakes, which I've arranged into a star shape purely for aesthetics purposes. Almost all of the rest of its 39 ton mass is Mk0 fuel tanks. In this mission, I perform 49 gravity assists, which is more than I've ever done before in a single mission. The bodies used were: Mun x15, Kerbin x13, Eve x7, Tylo x7, Laythe x6, Minmus x1. The Minmus assist was to prove that a Kerbin-Mun-Mun-Minmus-Mun-Kerbin-Mun-Eve route was viable in a real mission rather than just a proof of concept. All gravity assists and burns over 1 m/s are shown in the video.
  16. The first ever flight of the Hydra 3B, a crew SSTO capable of bringing 8 crew members into orbit. It was proven successful, and after achieving orbit it splashed down in the ocean east of the KSC, where the plane and crew were recovered safely.
  17. Hello everyone! A few days ago, I decided to remake an old SSTO design that I had once posted about on these very forums. I named it the "longsword" (after the Halo series fighter/bomber). The original SSTO incorporated "primitive" technology, and a lack of SSTO engineering knowledge. Having gone through 12 iterations and two rebuilds, I settled on the Mark 12 variant of the Longsword. It was easy to take-off/land anywhere, had a good top speed, excellent structural integrity, and all the onboard equipment required for science/return missions. However, it was small, and the 190+ part count (without any weapons) was painful for Kerbal maintenance upkeep (and my poor mac). At 30.2 m in length and 29.1m in wingspan, the Mark-12 was powered by 2x Rapier, and 6x OPT engines (can't remember the name). So, I decided to recreate the Mark 12, keeping the same airframe in mind, with a touch of SU-57, and sprinkle of GA-TL1 Longsword. Here are some before and after pics and I'll include an contrastive analysis at the end of this post: Before (Mark 12): After: (3.0 - D) Wingspan: 50.6m, Length: 51.0m Propulsion: 2 Nuclear "Eeloo" engines (V:LH2/All-ATM), 2 ARI reverse LH2 engines, 2 ARI forward LH2 "afterburners", 2 VTOL engines. Power Generation: Engine alternators, onboard Fission Reactor, one RTG. Radar: Track While Scan (TWS), Active Electronically Scanned Array (AESA) radome (Forward and Rear), extra Air-Air radome, Radar Warning Receiver, Radar Data Receiver. Countermeasures: 2x ECM Jammer. 6 (360 degree) lasers (2 rear-underwing , 2 front-underwing, 1 nose mounted, 1 tail mounted). Chaff & Flares. Weapons: 6 Laser turrets, 16 AMRAAM (A2A) missiles, 2 50. Cal turrets, 1 GAU 30mm cannon, 4 AGM's, 4 Nuclear Bombs. Fuel: Primary: LH2, Secondary (VTOL - Oxidizer). (Enough fuel for most round trip missions). Additionally, the entire fuselage and airframe is armored, so it can withstand a direct hit from 4-5 AMRAAMs. Here it is in the hanger: In flight: Nuclear Bombing Run: Escape Orbit: Eve Entry: Kerbin re-entry: AI war games with a Surface to Air Missile Unit: Dodging AMRAAM Missiles: In conclusion, the new design is roughly twice the size of the original. That being said, it also packs twice the offensive capability, many more countermeasures and advanced radar systems (allowing it to track dozens of targets simultaneously, with the ability to fire on multiple). It also has tons of extra fuel that can be very useful in striking celestial bodies. The new design also features a nuclear reactor, with the capability of powering the spacecraft and an entire space station or base. It cannot be shot down through conventional means, as there are far too many laser turrets onboard, which counteract barrages of seeking anti air missiles. Not to mention it is stealthy. Enjoy!
  18. Greetings everyone, Originally designed as an orbital freight ship, the heavy SSTO "broadsword" saw many months of augmentations to make it the perfect multi-role space craft. The initial design parameters emphasized endurance and maximum payload capacity, with the goal of reaching any celestial body's orbit on a single tank of gas. The spacecraft was never intended to touch down on any other planetary surfaces, and would rely on smaller towed "fighter SSTOs" for refueling missions. Unfortunately, achieving the initial goal pushed the total part count to 170, making it not worthwhile as a potential "aircraft carrier". The spaceplane was put in cold storage until Kerbin's military strategists wanted to explore its role as an orbital bomber, capable of delivering hundreds of 1.5 MT nuclear warheads at a moment's notice, undetected. This initiative called for a series of "survivability tests", which would push the airframe design to its limits. After some great successes between scientists and military strategists, a final design was approved that could withstand the conditions of all celestial bodies. The H-SSTO Broadsword Mk 6. Clocking in at roughly 1700 tons, with a width/wingspan of 74m, length of 83m, and relative height of 20m. This spacecraft carries about 6,670,000 units of liquid hydrogen fuel for its 11 nuclear, 8 VTOL, 2 SURGE, and 2 ARI reverse thrusting engines. In total the space plane is powered by 23 engines of various designs and purposes, as well as a large fission reactor. The nuclear engines do not consume fuel in any atmosphere. Maximum survivable airspeed is about 1800 m/s in low/less dense atmosphere, and 3500 m/s+ at higher altitudes. (I don't keep the throttle at more than 10% for non orbital atmospheric flight). It can transport a crew of 7 in the immediate cockpit and more in the additional crew compartments. Thanks to excellent usage of airframe integrated radiators and thermal control systems, the spaceplane can withstand the pulse of a thermonuclear weapon, as well as atmospheric entry up to 2,500 m/s. The broadsword is also capable of high G maneuvering, because of its strong structural integrity, variety of large control surfaces and thrust vectoring systems. The instrument suite was also enhanced to feature advanced communication systems (including a detachable orbital relay), celestial analysis equipment, and every resource converter known to kerbal kind. Despite the ~3.5 thrust to weight ratio, the spaceplanes mass places great stress on its landing gear, making it difficult to land or take off without employing the STOL or VTOL capabilities. This is largely due to a lack of advancements in landing gear technology, and so the broadsword can only survive touchdown at less than 5 m/s vertical velocity. A skilled pilot can easily operate within these parameters. Surprisingly, the design allows for incredible buoyancy, making landings on liquid bodies not only possible, but more attractive. Lastly, the spaceplane features a robotic arm, two (two crewed) escape pods, AESA air to ground radar, 360 degree track while scan air to air radar, surveillance cameras, two drills, and many other fun gadgets. It also features a nose cargo ramp for deploying vehicles on extraterrestrial bodies. When fitted for military operations, the spacecraft can deploy every weapon possible, from artillery to lasers to nuclear weapons. (Note I have around 50 mods, and I don't know how many were used to complete this spacecraft). Here are some pictures: More bombing pics:
  19. When Kerbals started to expand to the stars using the now found Kraken technology, murmurs started to spread that an ancient cosmic entity spoke to the scientist and gave them one name Cthulhu. impacted by visions of this unimaginable creature that is said to be a god, Bob Kerman stated that he was enamored to create a craft in the form of the creature he saw. He stated its name... Cthulhu This Craft is Stock with DLC. USES NO MODS using the latest in Kraken Technology from my Pantheon series Comes with vertical and horizontal Kraken Drives for Single Stage to Anywhere operations around the Kerbal System. Each Kraken drive comes equipped with 32 LY-05 and G11 hinges for thrust (x2 for both vertical and horizontal flight). Flight Instructions and Action Groups Set Unlimited Energy and Propellant (for weapons) Stage Fire Front Weapons Throttle Vertical Lifting Thrust AG1 Horizontal (Forward thrust) AG2 Up Flight Control AG3 Forward Flight Control AG4 Kraken Energy Vent (Visual) Flight Instructions (SAS) ON, tap Radial Out, Press AG 2 then Full Throttle to start to rise. after around 200-300m you will start to rise at a fast rate. Be patient as the Kraken kicks in. After around the 40k - 50k m. you start to turn automatically as the Radial out will flip. (DON'T PANIC). At this point, Press AG3, Drop throttle to zero, and you will start to follow the Radial out point. Keep this up until your Apoapsis reaches around your desired height (I recommend at least around 130k m.) At this point turn off Radial out and keep accelerating and correct until your circularise. ( I recommend turning off acceleration until you reach near Apoapsis) From here you are free to go anywhere you choose. Will be able to get on and off every planet that is viable. Does require Flags for some Visual (NO MODS) Flag Downloads: Drop Box: https://www.dropbox.com/s/1cg4u2qgwwu4qaj/Cthulhu Flags.zip?dl=0 Google Drive: https://drive.google.com/file/d/1nMp2ztLV0py3NMwu1_UDs-Z98dvKj4dO/view?usp=sharing Downloads Kerbal X: https://kerbalx.com/InterstellarKev/Cthulhu-Kraken-Corvette
  20. Details Type: SPH Class: ship Part Count: 847 Pure Stock KSP: 1.12.2 Description The newest edition to the Phaethon series, Tsukuyomi the Mun Queen Using Dual Kraken Technology to explore the Kerbin system. Capable of landing on the planetary bodies of Kerbin, an SSTA (single stage to anywhere). FULLY STOCK WITH DLC NO PART MODS. (Optional) Required flags for the legs and painted panels if you would like the same look. you can download flags here: Google Drive: https://drive.google.com/file/d/1VAGzfbkZZ2iSP2a6vd_oK9TmlhdsCb17/view?usp=sharing Dropbox: https://www.dropbox.com/s/ueqt4axq0eod84z/Tsukuyomi.zip?dl=0 Does not require fuel. Recommended infinite energy for max performance Action Groups (note for the main throttle is based on Kerbin gravity decrease a little for lower gravity bodies) Main Throttle Full Throttle (anybody) will have max accent ar around 220 m will start to increase speed ½ throttle (on Kerbal) hover mode with a 1-2 meter a sec decline Gear: Control Custom Landing Gear (x10) AG1 Forward thrust Kraken Drive AG2 Toggle Main Cargo Bay AG3 Toggle Back Cargo bay (to transfer Kerbals to planet surface) AG4 Toggle Docking ports (x4) AG5 Toggle 1st Cargo bay claw AG6 Toggle 2nd Cargo bay claw Flight Instructions Use radial out until you are off-planet Keep vertical accent until you reach around 34,000 meters the nav ball will flip once this happens it will attempt to turn to match the radial out at this point switch over to prograde after this continue to rise until your flight path is past LKO from here continue to circularize until you are clear with an orbit around kerbal. At this point, you have 2 choices. You can use the forward Kraken thruster (docking port Kraken drive) or continue to use the LY-45 Kraken Drive. Have fun exploring the system. Steam: https://steamcommunity.com/sharedfiles/filedetails/?id=2572756363&result=1 Kerbal X: removed for now. The site deleted my file some how in a error and it refuses to upload the craft for some reason. Will update whenever I hear back from the developer of the site. Have fun! update don't download the kerbal X link for some reason the site corrupted the file and im removing for now. Contacting site moderators the issue.
  21. Make a tiniest SSTO. No cheat No mod Leader Board 1. @camacju4.4 tons 2. @jinnantonix6.9ton 3. @jinnantonixagain 7.085ton 4. @AeroGav8 tons Point leader board 1. @jinnantonixagain 43 points 2. @jinnantonix18 points 3. @camacju10 points, SSTO mass without payload counts Kudos: Add some paload (500k -1ton) (10+points) Put two kerbals to orbit (18+points) Add some bigger paload (1+ton) (25+points)
  22. Welcome to Spaceplane Innovations, the online leader in executive Spaceplane sales. Dropping tanks is so yesterday, earn back some self-respect by going fully-reusable today! We have Interplanetary leviathans and nimble Mun Hoppers, Single-stage-to-anywheres and Cargo-carrying brutes. All capable of high crew capacity and total galactic dominance. Shop now, the SSTO of your dreams is just a click away. We also make rockets. View the full catalogue! Click to view the full catalogue! Artemis Class These spaceplanes are the biggest of the bunch (so far), consisting of 3 Mk3 fuselages side-by-side, with the ability to carry an enormous amount of cargo/crew to many different interplanetary destinations. The Archangel is the first of the Artemis line, and has the ability to easily go to Duna or Mun with 60 Kerbals, and pilots who have a good grasp of gravity assists will find further destinations, such as Eeloo, very possible as well! Video - Mun mission Video - Eeloo mission The Artemis is a monstrous spaceplane capable of carrying 124 kerbals to LKO with just over 4,000 m/s of DeltaV to spare. It can't fly quite as far as the Archangel, but it is quite capable of going to Laythe and back without refuelling. Video - Laythe mission Archangel Download Archangel Download Archangel v2 Download Artemis Download Argus Class These spaceplanes are big, brutal, and capable of interplanetary missions without breaking a sweat, independent of mining or refuelling. WARNING: You will need to replace the landing gear on the Argus II and Engadine with larger ones if you're playing in 1.1 or later. The Odyssey will work fine though. The Argus was built as a Bop SSTO, but in the end was mainly used for Duna cargo missions and Eeloo voyages. It doesn't work so great in 1.05, and so is no longer sold by Spaceplane Innovations. Video - Eeloo mission Video - Duna mission The Engadine was the hugely popular successor to the Argus, packing more DeltaV and a massive 20 Kerbal capacity. So far it has only been used for Mun landings, but we at Spaceplane Innovations believe it could easily be used for Duna returns too. Video The Argus II was built following the success of the Engadine as an ultra-long-range SSTO. It has more m/s of DeltaV in LKO than any other SSTO produced by Spaceplane Innovations. Video The Odyssey was built to replace the legendary Engadine. doubling its crew capacity while retaining its high range. Duna and Gilly missions are well within its capabilities, as well as Eeloo and Jool for those who have mastered the fine art of gravity assists. Video - Mun mission Make no mistake: these planes are unruly, bulky, unbalanced and difficult to tame. They are therefore best suited to more adept pilots who understand gravity assists and how to efficiently ascend from Kerbin. They're hard to master, but for those with the patience to learn their functions the pay-off is huge. Argus II Download Engadine Download Odyssey Download Acacius Class Acacius ships have an IRSU on board and are capable of refuelling themselves using mining equipment. These are at the forefront of exploration, and are the best "single-stage-to-anywhere" planes we offer! Only one model is currently available for consumers: The Acacius 2 is the first SSTO produced by Spaceplane Innovations to feature the "Single Stage to Everywhere" guarantee. Doesn't do Tylo. Or Eve. Or Jool. These craft are ideal for beginners who want to get to grips with gravity assists or the Jool system, without having to worry about fuel. WARNING: You may need to replace the landing gear with larger ones if you're playing in 1.1 or later. Video Acacius 2 Download Dune Class Before the Argus class, there was the Dune class. The second oldest class of spaceplane made by Spaceplane innovations (after the discontinued Revenge class), these are lightweight, agile, and pack enough DeltaV for Duna, Minmus, Mun and Gilly. Flybys of planets further out are also possible. Dune 3 is the latest and greatest in this class, sporting 3 seats and a cosy interior. These are moderately difficult to use, but experienced pilots shouldn't have too much trouble. WARNING: You may need to replace the landing gear with larger ones if you're playing in 1.1 or later. Video Dune 3 Download Phantom Class These SSTOs are the little-brothers of the Argus Class, and are slightly larger than the Dune class. WARNING: You may need to replace the landing gear with larger ones if you're playing in 1.1 or later. With room for 6 kerbals, the Phantom class is currently offers 3 models: The Minmus Trainer is the easiest-to-use SSTO sold by Spaceplane Innovations, and was specifically designed to train budding kerbalnauts in the fine art of Minmus SSTO-ing. Only the instructions are available for purchase, so that pilots can also learn how to build an SSTO too! Video (SSTO Tutorial) The Mun Phantom was the first Phantom Class SSTO packing enough DeltaV for Mun and Gilly landings, in addition to being able to do Duna flybys. Video The Mun Phantom 2 is a modified version of the Duna Phantom, packing a spacious cargo bay for all your rover carrying needs! Video The Duna Phantom is able to carry 6 kerbals to Duna and back, all in a sleek Mk2 fuselage! Video Video (SSTO Tutorial) The Laythe Phantom is capable of taking 2 kerbals to Laythe and back without refuelling! Craft file has been altered so that it won't enter a flat spin when the fuel tanks are empty now Video Mun Phantom Download Mun Phantom 2 Download Duna Phantom Download Laythe Phantom Download Vulture Class These SSTOs are designed purely for LKO missions. Vulture 1 is the first publicly available model in the Vulture class, capable of carrying 6 Kerbals comfortably to either a polar or equatorial orbit. Vulture 1 download Matlon Laboratories Matlon Laboratories is a new company, designing cutting-edge rockets, shuttles, stations, bases, rovers, and much more! SSTOs are still very-much exclusive to Spaceplane Innovations, but for anything else, Matlon has you covered! Brutus is a high-capacity Space Shuttle, and uses Solid Fuel boosters and 3 Vectoring engines to lift the orbiter into space. Played a key-role in the construction of the SkyBase Space Station, which was commissioned following the destruction of SpaceLab during the Duna Attacks strikes Video Sparrow is a seaplane packing every science experiment unit in the game, in addition to communications tech and a deployable mini-sub! Video Monolith Station aims to bring stations to the masses, being a space station capable of being fully assembled in 1 Launch Brutus Download Sparrow Download Monolith Station Download
  23. I present to you fine spaceplane enthusiasts... the Kerbal Wind Tunnel mod! We all build spaceplanes to fly faster and higher, but how do you know how fast or how high your current design can go? In the real world of aircraft design, engineers calculate the flight envelope for their aircraft before the first test flight rolls out. This mod runs your spaceplane through a virtual wind tunnel while still in the SPH and predicts its engine and flight performance at every speed and altitude. It also gives you a readout of various performance curves, plotting against angle of attack: ... and velocity: Try it out and start building even better spaceplanes today! You can even output the data to a CSV file to incorporate knowledge of the performance data into a KOS script or the like! Check out this Imgur album for more details on these images and more: https://imgur.com/a/D2i4Fge Download it from GitHub: https://github.com/DBooots/KerbalWindTunnel/releases Or SpaceDock: https://spacedock.info/mod/1927/Kerbal Wind Tunnel Source: https://github.com/DBooots/KerbalWindTunnel Released under the MIT License (with sub-components under their own license). P.S. This mod incorporates a pretty sweet graph-drawing library I made. If anyone's interested in super-simple graphing of data, hit me up.
  24. Trying to work on Eve SSTO, realized that it's impossible. Although, in this process I got a single stage (stock) propeller plane with rockets equipped capable of orbit. It ascends to the edge of the stratosphere only with propellers, and get into orbit with rockets. Album https://imgur.com/a/Ux6qS will appear when post is submitted So propeller plane can get to stable orbit, if enough rocket engines and fuel are provided. Then, a new question arose. How far can a propeller plane go? Rules: 1. No cheating, No Alt+F12 cheats in flight. (Visible bits are allowed) + No mods with gameplay effects. (Again, visible mods are allowed) 2. Only rocket engines and stock propellers are allowed on the entire flight. No airbreathers, no infiniglides, no gyroscope drive, etc. 3. The plane should be able to take off and fly around fully-fueled with propeller-only. 4. Propellers should be able to be re-docked to the craft, to ensure the completeness of the craft on orbit after physics load. 5. It shouldn't take over an hour for a craft to get to orbit. 6. At least a kerbal should be on board. Score is the dv left on orbit. The destination of the plane can be noted on the leaderboard. Leaderboard: + All rocket engines allowed 1. @Reusables 3m/s 2. @Reusables 0m/s + Propeller-Nerv SSTO 1. @Reusables 3m/s + Propeller-Ion SSTO 1. + Propeller Passenger Plane (contains Mk3 Passenger Module) 1.
  25. The history of Eve SSTOs and reusables For a long time it was said, Eve SSTOs are impossible. Even going there and back reusable was unthinkable. But then a hand full of brave Kerbonauts put all their efforts in proving this wrong. This is their story. 03.09.2015 - V1.0.4 - First SSTO plane from Eve's surface to Orbit @astrobond was the first to do the impossible. He created this SSTO which was capable of getting from surface to orbit using stock parts and physics. To stay in the narrow margin, the control was given to KOS. 05.07.2016 - V1.1.3(?) - First reusable trip from Kerbin to Eve's surface and back @Stratzenblitz75 was the first who managed to do the entire trip from Kerbin to Eve's surface and back completely reusable. He is using a spectacular and never seen before suborbital catch of the lander, as well as massive SSTO launch systems. 19.08.2016 - V1.1.3 - SSTO rocket from Eve's surface to Orbit @Kergarin (I) was inspired and motivated by @astrobond's SSTO to start playing around with different SSTO designs. Coming to the conclusion, that SSTO rockets actually seem to work better than planes, giving a larger margin and payload. 23.08.2016 - V1.1.3 - First SSTO Lander from Eve's orbit to surface and back @Kergarin (I) was then able to scale it up to a bigger version, with enough payload to equip it with isru and seats for all our 4 brave Kerbals. Resulting in the first ever SSTO wich can not only launch from Eve but also land on its own in one piece. By being refuelled in low Eve orbit, this craft could have done the entire trip Kerbin to Eve and back reusable. My plan was, to do a reusable trip to all landable bodys in the Kerbol system based on this lander plus an orbiter, but this plan should be crossed soon... 11.10.2016 - KSP 1.2 release - an increase in Eve's atmospheric pressure changes the rules The pressure of Eve's atmosphere was increased, resulting in even higher drag and giving all engines lower thrust and Isp, making Eve SSTOs even harder... it seemed. The change in the Mammoth engine thrust for example: For reference Eve's atmospheric pressure in 1.2.2: After this change my SSTO lander stopped working, at least with the needed payload for ISRU. While the change in pressure made SSTO rockets harder, it will soon turn out that SSTO planes now work better again. 29.10.2016 - V1.2.2 - the first asteroid refuelling assisted SSTO plane from Kerbin to Eve's surface and back @EvermoreAlpaca built this craft initially in 1.1.3., and when 1.2 came out, this plane worked even better, opposed to SSTO rockets. This craft can get from Kerbin to Eve's surface and back to Eve's orbit independent. It then needs orbital refuelling, to get back to kerbin, which is realized by the craft itself moving an asteroid to low Eve orbit in before, which is then used for ISRU refuelling. 28.01.2017 - V1.2.2 - SSTO rocket from Eve's surface to orbit achieved again @Kergarin (I) managed to make my small SSTO rocket work again in 1.2.2. But scaling it up did not work as good as back in previous versions. The ISRU lander would have become unhandleable large. So I cancelled this concept. 20.05.2017 - V1.2.2 - infinitely reusable trip to Eve (and first ever to everywhere else) and back Since my Eve SSTO lander doesn't work in 1.2.2 anymore (and I didn't want to do this in an old version), I adoptet @Stratzenblitz75's concept of suborbital docking and developed it to a single ISRU ship wich splits in two for the Eve landing with his friendly permission (thanks again!). (Creating the first ever ship which can independently and forever travel between all 14 landable bodys. But that's on another page.) Skip to 3:40 for Eve landing (caution: flickering scenes in fast forward) 07.03.2018 - V1.3.1 - smallest ever SSTO plane from Eve's surface to orbit @astrobond the creator of the first ever Eve SSTO comes back to the game. Presenting us the smallest ever seen Eve SSTO. Also it's the first not to use the Mammoth engine, but the Vector with a slightly lower twr. 11.06.2018 - V1.3.1 - reusable two stage plane from Eve's surface to orbit and back to surface @OHara created this reusable two stage plane, which can be used for crew rotations of 4 Kerbals per flight. It launches horizontal and then transitions to vertical ascend pushing the ap far above Eve's atmosphere. The second stage then undocks and accelerates to orbital speed before the first stage reenters and glides back to its starting position. The second stage can also be landed and then redocked to the first stage. The craft then needs some external refueling to be reused. 29.10.2018 - V1.5 - First completely independent SSTO plane from Kerbin to Eve and back SSTOs to Eve's surface and back to orbit were now proven to be possible, and they seemed to be the limit of possibilities. All of them need some kind of orbital refuelling or catch to escape from low Eve orbit. But then @EvermoreAlpaca did the unthinkable. A massive independent SSTO from Kerbin to Eve's surface and back to Kerbin. He managed to raise the payload on Eve ascend that much, that there was enough margin to fit an ion drive with enough dV to escape Eve's gravity and then send the ship back to Kerbin using some gravity assists, without any dependencys. 04.12.2018 - V1.5 - First stock electric prop SSTO plane from Eve's orbit to sea level and back to orbit (plus from and to Kerbin by external refuelling) @EvermoreAlpaca continues doing the impossible by presenting us this stock electric propeller assisted Eve sea level SSTO. It ascends from sea level to above 19km sole on electric props, then continues its way to orbit on conventional rocket engines. It can also launch and land at Kerbin, but needs external refueling to do so. This craft uses clipping for the stock props as well as engine clipping, but is honored in this list for being the first of its kind. 28.01.2020 - V1.8.1 (+ Making History + Breaking Ground) - First Breaking Ground electric prop multi engine SSTO plane from Eve's orbit to sea level and back to orbit @realseek was the first to show us a working sea level SSTO using electric rotors and blades from Breaking Ground, packed into cargo-bays to reduce their drag, after switching to rocket engines. It reaches 16km on electric props (two EM-64S rotos with 16x R25 blades on each. The rotors run at 60% power and a max RPM of 400). To escape Eve's still dense atmosphere, it uses a combination of 3 Vector engines and 2 Nervs to circularize. As if an Eve sea level SSTO would not be enough, this craft can land fully fuelled from orbit , also carries the extra weight of ISRU quipment without even needing it, because it can launch from Eve below 100% fuel and stiff make it to orbit with hundreds of m/s dV left to spare, while the craft even looks good. This is just insane! More pictures and details: https://imgur.com/gallery/afVyAv1 15.02.2020 - - V1.8.1 (+ Making History + Breaking Ground) - minimalistic Breaking Ground electric prop single engine SSTO plane from Eve's orbit to sea level and back to orbit (+ to and from Kerbin with a separate tug) @Kergarin i was a little to slow on this, and humbly take the second place. Props alone work great, and rockets alone work great. But in combination the drag of props after igniting the rockets is horrible. The way to deal with this, is placing them inside cargo bays, to shield their drag when they are not used. It would be beautiful to use hydraulic cylinders to make them stick out, and while this would be possible in term of weight and drag, they sadly the flex way to much to even lift off. I've tried a lot of designs for this since BG came out, and while @realseek found the mixed engine design work best for him, I found a single enige design work best for me. This craft uses two EM-32 Rotors with 6 R25 blades on each which run at 100% torque and max RPM to climb to 17km. To escape the dense atmosphere, this craft uses a single vector Engine on full thrust, and then carefully throttle adjustment to not overheat and circularize. This was done as grand finale in my reusable career playthrough: 28.05.2020 1.9.1(?) First stock (no DLC) electric prop SSTO helicopter rocket to sealevel and back without clipping (+ from Kerbin and back) @Stratzenblitz75 returned to Eve, almost 4 years after he was the first to do a completely reusable roundtrip from Kerbin to Eve and back using suborbital docking. This time he uses an SSTO rocket which is first lifted by insanely large counter rotating koaxial like props to 39km, and then ignited to get to orbit on rocket power in a single stage. The props consist of stock bearings, but they are not powered by the usual way of using reaction wheels. To reach the record height of 39km, large rover wheels power the props, which is obviously way more efficient. The craft features ISRU, and can therefore land and launch unlimited often and completely independent on Eve. The craft takes of from Kerbin using a single reusable launcher, and is pushed to Eve and back by an orbiter. This far Kerbalkind conquered the purple monster as of the middle of 2020. Can they go even further? Disclaimer:
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