Zosma Procyon
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Posts posted by Zosma Procyon
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I've been experimenting with air launched rockets to get Kerbals off of Eve, and tested the best version yet today. It was just 245 m/s short of entering a stable 150ish km orbit around Eve. The idea is that by flying up under electric power to 10ish km, I can skip some of Eve's stupidly thick atmosphere.
I wonder if anyone can guess where the prefix "EVL" came from. HINT: It's stupider than you think.
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Three of my rescue ships arrived at Laythe, Pol, and Eeloo, in the last few days. So I took a few snaps of them in action. One of them represents a massive f*** up on my part.
This is a standard design I use for rescues in Jool's sphere of influence. It's mostly built out of clusters of liquid fuel tanks with four NERVs. The outboard tanks are actually drop tanks. The rescued Kerbal will ride back to Kerbin in their original wreckage, so I can make some extra credits by selling it.
I did not actually design this class of rescue ship for aerobraking, but after a few failures I figured out how to make it work. I turned on the radiators and put the ship into an axial spin. This prevented any part from overheating. The aerobraking saved me about 500 m/s of Delta-V. I didn't actually need the savings, as after arrival this rocket still had over 7000 m/s of fuel left.
To save fuel on my Pol rescue flight, I used Tylo for a gravity assist. I was surprised at how well it worked. It was traveling at interplanetary transfer speeds before the Tylo encounter.
The Pol rescue ship expended its drop tanks during its Jool exit burn, so I put the ship into an axial spin and let them rip.
I didn't put the Laythe rescue ship into a spin, and this is what that looked like.
Out at Eeloo, I had three Kerbals waiting for rescue, and I wanted to retrieve their shipwrecks too. So I built this.
It Eeloo Triple Recovery features three internal cargo bays, each with a Klaw. The RCS allowed me to easily maneuver the ship to grapple the wrecks.
Here is two out of three.
And the third capture...
...which nearly perfectly fits.
Eeloo Triple Recovery is the f*** up I mentioned. While it did the job and and has enough fuel, I must have been drunk when I launched it. It has no parachutes or heat shields or radiators. I launched it half finished. The nose mounted Klaw is unoccupied, so I will use that to dock it with a reentry module. The Eeloo to Kerbin window opens in 169 days.
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I've arrived at a design for a twin boom flying Eve base that I both really like and flies very well.
My first prototypes were all cooler looking swept wing designs, but the wing sweep put the center of lift/pressure way behind the center of mass. As a result the maneuvering characteristics weren't good. In fact they could barely climb in Kerbin's atmosphere, and the "water" liftoff velocity on Eve was almost 40 m/s. This wing design, along with two full fuel tanks at the end of the tail booms, put the centers in pretty much a perfect position. You might also notice that the wing design I arrived at is pretty similar to that wing of my muse for this aircraft, the P-38 Lightning. Kelly Johnson knew his stuff. This is still a prototype, and the launch version will not look this clean. I have to add accoutrements (first time I think I have ever written the word "accoutrements") and accessories make it easier for the crew to operate on Eve.
Because Eve's atmosphere is annoying thick, and this aircraft has to launch from Kerbin inside a fairing with a maximum radius of 9m, the wings had to fold. Early on I had a "lightbulb moment" when I realized the wings didn't have to fold as flat as possible. The first set of hinges have a minimum angle of 20 degrees. And even with the cool tail fins, this airplane is only 15.6 meters across at its widest point. So while I still have to use the largest size fairing, it can be measurably more narrow.
Here it is during a test flight on Eve. I love the "Set Position" cheat. It takes the guesswork out of designing vehicles that have to function in alien environments.
And here it is from underneath.
Update: I'm adding another cargo bay section.
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It looks like I might be starting over after all, for reasons completely beyond my control. My save file had a glitch of some kind and now says it was just stated and won't even open. Ordinarily I'd just recover it from my backup hard drive, but that's current sick too. And honestly I'm okay with starting over since there are features of the game I can't get in my old save file. If I start over. i'm going to cheat to unlock the tech tree and get some starter cash..
UPDATE: It took 20 hours of disk first aid, but my backup drive works again.
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I've been tinkering with a small buggy for my next Eve crew to use when deploying science equipment. And as usual, I made it over elaborate.
The headlights are on piston so they can be extended to serve as work lights.
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So I've been tinkering with flying base concepts large enough to hold a small rover in a cargo bay, and haven't been having much luck. The wing designs I've been messing with were not very good. So on a whim I decided to build one based on the design of what I as an IRL astronautics engineer think is the best fighter of WW2: The P-38 Lightning. Of course swept back wings are better than straight, so it ended up looking more like the De Havilland Sea Vixen.
I moved my new favorite propulsion system, ducted fans, to the front, put the science labs, batteries, NUKs, and reaction wheels, out in the booms. The main fuselage only contains two cockpits and the cargo bay. And guess how bad this flies? Not bad at all. It is 15 to 19 m/s faster than my current flying Eve base. More maneuverable, more stable in a straight line. And the weird part; as is in this test version it can take off from "water" without issue. Every other flying base I've deployed uses floats and hydroplane fins to help it take off from a wet surface, but this mongrel doesn't need them. I'm going to push this design forward.
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I tested and rejected a new flying base concept.
It is propelled by two electric rotors with propellers instead of ducted fans. I thought they might be faster ducted fans; they aren't. This thing is almost 20 m/s slower than my current flying Eve base. It's also predictably very heavy, and some of those tanks are full. I got the trifolding wings to work sort of reliably, but they don't need to be that long.
The idea of this plane is for it to be large enough to hold a small rover in a cargo bay, which would be used by Kerbals to deploy science equipment.
I'm going to try a similar, though longer to accommodate reaction wheels, and with delta wings. Eventually, if it works out, this too will have to be capable of landing and taking off from "water".
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What is the optimum angle of attack for the "Propeller Blade Type S"? I'm experimenting with a second flying science base for possible deployment to Eve.
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I'm flying my Eve Airplane, which I have renamed "Brabazon Base", a few hundred km to a new biome. Did you know that flying long distances in KSP is rather boring? I keep forgetting that. So here is a cool screenshot of Brabazon Base from the front.
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I landed my Eve Airplane on Eve. I recorded the deorbit and landing, and the video is 40 minutes long. I'm going to see if I can figure out how to edit it down before uploading it to youtube. Here are a few pictures.
Here it is just after I blew the fairing, but before unfolding the wings and motors.
Valentina Kerman had the honor of setting the first flag of the mission. She's the last of the original four to set foot on Eve, and this is the last new place left to her.
It took a LONG time for the aft heat shields, ballute, and parachutes, to touch down.
Here are Agarien (Engineer) (Left) and Megtha (Scientist) (Right) in front of the first deployed science outpost I've ever made. I tried to color code the crew (orange for pilots, yellow for engineers, and blue for scientists), but it didn't completely work.
Here is Tilda Kerman, a properly color coded scientist, out to collect data from several experiments.
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I'm procrastinating from landing my Eve Airplane, so decided to make a Katyusha style rocket barrage. I also recorded it to remind myself how to use Screenflick.
And I made it a gif, too.
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Today my Eve Airplane arrived in orbit of Eve. It is so much faster to send rockets to Eve than other bodies.
Purple.
Turns out it didn't refuel as completely as expected.
The outboard boosters were expended and the core booster took over; it will also knock the rocket out of orbit after refueling at a low orbit fuel station.
Here it is on final approach to dock with the fuel station. Of course MechJeb handled the docking maneuver.
And docked with the fuel station. I'm going to wait to deorbit it until I remember how to record KSP on my MacBook Pro. Assuming I don't trump the maneuver, it should be fun to share.
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12 hours ago, kedrednael said:
I'm very curious how large that airplane is!
30.8 m long, 31.2 m wingspan.
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My Eve Airplane departed for Eve.
The plane is folded up in the fairing.
36 Mammoth engines. I could and should have used older/smaller tanks and engines. Maybe I'll remember that next time.
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13 hours ago, Fierce Wolf said:
My Gilly bases are the funniest, every time I load it jumps up and take half an hour to come down again to a stop
Yeah I don't do Gilly bases anymore. Just build a space station that can land to satisfy a contract, then put it back in orbit.
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4 minutes ago, Boyster said:
If you want you can try this https://forum.kerbalspaceprogram.com/index.php?/topic/180083-ksp-110x-parking-brake-030-2020-07-20/
After you turn it on it seems to keep the vessels/bases' on the ground and 100% not moving at all.
Its a really useful mod.
It works with any parts touching the ground except when only the engines touch the ground and Kerbals EvA.
I deleted WorldStabilizer, which is really outdated, and some of the problem went away. I think about half of my bases are unsalvageable, and I'm just going to beam them back to Kerbin. Interestingly, they're all rather old, at least 10 in game years old. One of my newer base simply smashed to pieces when I Ioaded it.
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Today I launched a flying science base meant for Eve, and then tried to load into one of my surface bases from before I stopped playing KSP for a year. My save file is old, from around 1.4, and I updated before I started playing. So far all of the surface bases I've tried to load into have been subject to violent kraken attacks, violent bouncing off the ground. One actually blew up despite the invincibility cheats being active. Of the five i've loaded into so far, one exploded killing all 6 Kerbals on board, three are affecting so badly that I had to set them in orbit, and one in affected only bad enough to spin in slow circles. I have eleven other surface bases. And I think the problem is that all my bases stand on wheels, and vehicles with many wheels are now more vulnerable to the kraken than they were I took a break. I'm leaning toward declaring my save file FUBAR and starting a new career game.
EDIT: The Butcher's Bill actually wasn't too bad. One base exploded and killed its crew, another was smashed to pieces but the crew survived, and six had to be beamed back to Kerbin for early retrieval. I'm going to keep this save for the time being.
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I've just discovered that many, probably all, of my surface bases are subject to Kraken attacks; specifically they're violently rejecting contact with the ground. I have the WorldStabilizer addon, but it does not seem to be working. I'm going to attempt to use the "Set Position" cheat, but I think I might have to just upgrade them all to space stations, or even recall them directly to Kerbin. Is there is solution to mass Kraken attacks, that does not involve tampering with my save file?
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I launched my Eve Airplane into orbit.
Here it is on the launchpad. The actual airplane is in the fairing.
And liftoff.
I realized after the fact that I could probably launch it with fewer engines and tanks, and older parts. But I like the giant tanks and mammoth engines.
Heading for low Kerbin orbit.
Preparing for a minor plane change before rendezvousing with my Kerbin Orbit Fuel Station
The view from the main cockpit is very exciting.
It does in fact need all those heat shields.
Nearing the fuel station. Mechjeb screwed up the rendezvous maneuver so I had to do it by hand.
And here it is docked with the fuel station.
The transfer window is in 129 days, at which time it should be fully refueled by the station's on board ISRU converter. I've programmed an alarm to remind me to check its progress in 50 and 100 days, and can send up tankers if it doesn't refuel completely. The four outboard boosters should have just enough Delta-V for the Eve transfer burn once refueled, certainly within 10%; though I will probably ditch them on an Eve collision trajectory. The rocket will rendezvous with another fuel station in low Eve orbit. The core stage will deorbit the payload, and play actual plane will unfold and deploy at about 2500 m above Eve's surface.
This is what the plane will look like in its high temperature and pressure habitat.
Crew capacity: 15: though only 13 are on the mission, in case I get a rescue contract. It carries two science labs, four antennas, six material studies and goo containers...
And 16 sets of deployable science equipment.
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2 hours ago, jimmymcgoochie said:
Pointless radiators will only add mass and drag, slowing you down. Unless you're building some kind of monster plane that needs all those RTGs, you'll be better off using solar panels and just landing before it gets dark or bringing just enough RTGs to stay in the air until you find a good landing site. What kind of propulsion system are you using that needs so much electricity?
Two electric ducted fans.
The Nuks are tucked away inside the batteries. Each rotor takes about 30 Nuks to power it.
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1 minute ago, jimmymcgoochie said:
While it is rather hot on Eve, KSP has rather ludicrous heat tolerances for parts and most (all?) crew parts can survive an internal temperature of up to 1000K, which is hotter than the melting point of Aluminium...
Drills and ISRUs generate heat while operating and need radiators to cool them, otherwise you don't need radiators. RTGs generate a bit of heat, but they should be able to dissipate their own heat as well. Why exactly do you need so many of them though? Eve is a good place for solar power and some big static panels mounted flush with your wings will generate plenty of power without adding too much drag.
I decided to add 12 large radial radiators to keep the crew cool. The plane is meant to explore as much of the planet as possible, so solar power is not viable. The Nuks give it unlimited range. They also make it really expensive, but I have more than enough kredits to spare.
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I'm preparing to launch my Eve Airplane to its 130 day parking and refueling orbit, and I remembered I didn't put any radiators on it. Because its fully electric, powered by about 100 Nuks, it doesn't carry any mining or fuel refining equipment. During entry to Eve's atmosphere, it will be protected by a fairing and 9 inflatable heat shields. But surface temperatures on Eve are still rather high. Should I add radiators, for crew comfort in anything?
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How do you program rotors to operate like powered wheels. It occurred to me that by using rotors as hubs and either fuel tanks or fairings as wheels, we could make some absurdly large wheels.
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10 hours ago, jimmymcgoochie said:
@Zosma Procyon have you tried flying that plane in Eve’s atmosphere with the wings still folded? It would require some of the outer control surfaces to be either disabled or reversed, but with the thicker atmosphere it should be possible to at least glide it down rather than messing around with parachutes or trying to pop the fairing on the surface.
The main reason I don't want to do it that way is it would take a long time to glide the plane down to the surface. I'd much rather smash through the upper atmosphere like a battering ram and not deploy the plane until it's deep enough to actually fly. And anyway I though of an even cooler way to deploy it. The fairing with parachute down into the Eve troposphere, at around 10 m/s. Then at around 13000 m I'll blow the fairing, leaving the plane hanging nose down from the fairing base. Then I'll unfold the wings and engines, decouple from the fairing base, and fly down like a bat.
Toward which direction/heading does Eve rotate: 90 degrees or 270 degrees?
in KSP1 Gameplay Questions and Tutorials
Posted
I should really know this by now, but I'm really bad at 50/50 choices.