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  1. Deadly Reentry 7.7.1, for KSP 1.5.1 - The Ariel Edition What Deadly Reentry does! (especially with KSP's new handling of thermodynamics) Deadly Reentry balances part thermal properties (max temp values of skin and internal as well as various conduction properties: skin-skin, skin-internal, emission, etc) If parts get too hot then they may catch fire. (or begin to melt; depends on if they are logically flammable or not). This begins to happen at 85% of its max temp. Some parts have had their max temp increased to compensate. Basically, think of the 85% mark as being a soft failure point leading to hard failure. As of DRE 7.6.0, this is implemented on a per area skin damage system (X+-, Y+-, Z+-). As the exterior is damaged, the interior becomes more exposed to direct reentry or supersonic heating. (the interior usally has less resistance against heating) Parts and Kerbals that experience excessive G forces for excessive periods of time may fail/die. Download latest version! (official release) If you find this mod helpful and want to throw some money away, feel free to click the donate button below! ialdabaoth (who is awesome) created Deadly Reentry 2, based on r4m0n's Deadly Reentry; this is a continuation. This continues NathanKell's work on Deadly Reentry continued, and he might contribute more at times. License remains CC-BY-SA as modified by ialdabaoth. Also included: Module Manager (by sarbian, swamp_ig, and ialdabaoth). See Module Manager thread for details and license and source: http://forum.kerbalspaceprogram.com/threads/55219 Module Manager is required for DREC to work. INSTALL INSTRUCTIONS: If you currently have Deadly Reentry installed, go to KSP/GameData/DeadlyReentry and delete everything (files and folders). Also delete any old versions of ModuleManager (modulemanager.dll for example) in your KSP/GameData folder. Extract this archive to your KSP/GameData folder * ModularFlightIntegrator is not currently required or used by Deadly Reentry as of about DRE 7.2.2. USAGE INSTRUCTIONS: Be careful how you reenter. Make sure your craft has a heatshield (the Mk1 pod has a built-in heatshield, as do stock spaceplanes; the Mk1-2 needs a heat shield from the Structural tab). For a low Kerbin orbit reentry, try for a periapsis of about 10-20km over Kerbin. do not deploy your parachute until speed has dropped below ~350m/s. (typically you should be at a safe velocity by the time you reach an altitude of 7km) Note: Deadly Reentry no longer interferes with chutes. Both stock chutes and Real Chutes have adopted their own implementations of punishing deployments at unsafe speeds. The above warning still applies except you don't get to blame Deadly Reentry about it. Compatible shield/reentry packs! Deadly Reentry Frequently Asked Questions. Changelog: Old Legacy Changelogs! Download (latest official) Source on Github
  2. Before posting feature requests or bug reports, please read the FAQ. FAQ Works with stock aerodynamics and FAR Reportedly works with deadly reentry real solar system Rescaled Kerbin Outer Planets Mod Compatible with Blizzy's toolbar If you see weird spirals or other crazy lines everywhere, double-check you didn't enable "body-fixed mode" by mistake If the predicted trajectory seems inaccurate, check that you set the correct orientation in the Descent profile (or checked Prograde or Retrograde), and that you keep that orientation all the time It's not possible to predict a trajectory for a future stage. We know this is a highly requested feature, but unless we duplicate big parts of the KSP-internal code, we are limited to simulating the current state of the vessel. Parachutes are not simulated (that's usually not a problem if you open it near the ground) Download On SpaceDock On GitHub Description The mod displays trajectory predictions, accounting for atmospheric drag and lift. Works with the stock aerodynamic model, and with Ferram Aerospace Research (FAR). With this mod, you can choose precisely the location where you'll crash. The typical precision is about 6km. Plan Aerobraking maneuvers that can, for example, put you on intersection trajectory with another body (see point 1 about what you can do from there) Keep in mind that this software comes without warranty of any kind, and in particular that it may or may not help you survive, reach a specific target, or anything at all. But it usually helps User manual See your predicted trajectory Open the map view This is it ; trajectory display is enabled by default, you have nothing else to do White is the trajectory in space, red is the trajectory in atmosphere, the red cross is your impact point (that takes the body rotation into account to show the impact point on the terrain, this is useful both for bodies with and without atmosphere) Disable the trajectory display Click on the Trajectories icon in the stock KSP toolbar (or Blizzy's toolbar if it's installed) to display the main UI Click "Display trajectory" to toggle it on/off Click "complete" to toggle display of the complete trajectory (including parts where it is superimposed with the stock KSP trajectory) Set a target point (nav ball guidance) Adjust your velocity so that the red cross is located where you want to go Click "Set current impact as target" to enable the green cross Alternatively, there is a button to set the target on the KSC (works on Kerbin only obviously), or you can enter longitude/latitude Go back in flight view, and notice the two new indicators on the nav ball The square indicator shows where you need to point your craft at if you were exactly following the predicted trajectory The circle indicator is a hint about the direction you should go to adjust your actual trajectory to reach the target (this is not necessarily where you need to point, what's important is the direction between the square and the circle, and the distance between them indicates how far you are from the perfect trajectory) Body-fixed mode Use this toggle to switch between the regular mode (similar to stock KSP orbits), or body-fixed mode. In body-fixed mode, the trajectory is displayed relatively to the body frame, following the body rotation. This mode makes sense for atmospheric or low terrain fly-by, and also to adjust a geostationary orbit. However, for most high orbits, it will just look funny. This can help you keep occupied for those 2-year-long planetary transfers, but try not to burn up all the fuel to see how it can make funny curved lines. Manoeuver nodes You can plan aerobraking or re-entry after manoeuvers, just place your nodes as usual and see the predicted trajectory. Keep in mind that you always place nodes on the stock trajectory, that might be very different from the predicted one, so you may have to place nodes at a point that have an effect somewhere else on the predicted trajectory (especially when planning landing on a body without atmosphere with body-fixed mode). Also, atmospheric prediction can happen only for the body you are currently orbiting, so you can't plan a Kerbin re-entry while you're still arround the Mun. Support and Bugs If you have questions and feedback regarding a current release, feel free to post in this thread. Please post bug reports on the GitHub bug tracker. If you don't know how, don't want to learn or are unsure it's a bug, you can ask in this thread. Contributions This mod is a community project! It was originally written by @Youen and is currently maintained by @PiezPiedPy. The following people have already contributed to this project (in approximative order of commits): Youen (Github neuoy) PiezPiedPy Kobymaru (Github fat-lobyte) atomicfury (Github sawyerap) And many others. You want to be part of this list? Contributions are very welcome! Read our Introduction for Contributors, fork the Repository on Github and have a go at the code! When you feel that your changes are mature enough to be included, send me a pull request! Also, please let us know what you are working on in the development thread. It's always best if you work on your "pet problem" - a bug that needs to be fixed or that you personally want to see implemented. Or you could just grab an issue from our Issue Tracker! For discussions about Mod internals and Development, please head over to the development thread. Change log The changelog started with release v1.6.7. For the changes in versions older than that, please visit the GitHub releases page. License This mod is under GPLv3 license, feel free to look at the source code: https://github.com/neuoy/KSPTrajectories
  3. Re-entry Particle Effect This mod adds code to display an unused stock particle effect for reentry, featuring a plasma trail and sparks. Downloads CurseForge | SpaceDock | GitHub Download packages, art and sound assets, binaries and libraries licensed All Rights Reserved. Source included, project also available on github licenced under GPL v2. If you've enjoyed this, consider donating a cup of coffee to help with late night coding: Change log v1.4 (2019-02-12) Recompiled and updated for KSP 1.6. Reduced the scale of the plasma trail. v1.3 (2018-08-24) Recompiled and updated for KSP 1.4 compatibility. v1.2 (2016-10-24) Recompiled for KSP 1.2. v1.1 (2016-07-04) Changed re-entry effects to activate only during harsh aerobraking. v1.0 (2016-07-03) Initial release.
  4. I have three kerbals hanging on to the back of a heat shield during reentry. The heat shield is 2.5m, so more than enough room for all three to fit. Yet they still overheat and explode even after many tries. Do they actually have to be in a pod for the heat shield to work properly? Here is the scenario: https://imgur.com/a/Q2FAfSp
  5. In the first half of this year, I did a lot of reentries with a Mk1 pod and a matching service bay underneath and it always went flawlessly, with the craft properly orienting retrograde and staying there even without SAS. When I fired up the game earlier this week after several months, however, I'm suddenly finding reentry nigh impossible with this arrangement: if it orients even 10° away from perfectly retrograde due to the pilot not yet having hold-retrograde for SAS, the whole craft violently flips prograde and plows into the ground at 600 m/s. Attaching a heat shield to the bottom of the service bay not only makes the issue even worse, but the heatshield actually generates so much lift that it nearly flips the rocket after first stage separation. Turning on the center of mass indicator in the VAB shows that the center of mass refuses to budge from the pod, even with a service bay and a heatshield full of ablator underneath. This most definitely did not use to be the case a few versions ago. What happened? Did an update modify the Mk1 pod's aero characteristics? Before anyone asks, I do not have FAR or any mods that affect aero. Granted, the Mk1 pod also didn't use to start violently spinning at the beginning of EVA that makes returning nearly impossible. And since I updated to 1.4, the "edit vessel in VAB/SPH" button on both the Launch Pad and the Runway is permanently dark and unclickable.
  6. I have encountered a bit of a problem while designing how the re-entry of a large rocket will work. I have a 3-2 converter at the top of my rocket under my command pod. It would be the heaviest thing on the rocket with a mass of almost 17 tons while full. During reentry, the rocket would almost certainly flip and burn up. Question: Is there any way to drain all of the fuel off of a tank without accelerating or moving? If I could, it would reduce the weight to just under 2 tons which should be easily manageable.
  7. How did this happen? I blame kopernicus, but I can't delete it cause I need it for sigma. The reentry effects trigger about 20 m/s.... help.
  8. ok, i was designing a rescue SSTO, it works pretty well except by the fact that the probe loses signal in reentry at high speed, but if i take off and reach a higher speed within the atmosphere, the blackout doesn`t happen. I would like to know if it is a know bug or i`m doing something wrong and how i can avoid this (if possible at all). the probe module is in the tail section of the SSTO. Images of the test I made without a pilot. this is without orbiting (infinite proppelent used and different engines than the original so i could reach the speed) as seen, no modifiers on the signal reception below is the test after orbiting (reentry) with the same craft in the image above. lower speed, pretty much same altitude (but it remains without signal until about 9km).
  9. Hey all, I'm trying to do a crewed lunar flyby in RSS, and I don't really have the tech yet to build a crewed lunar orbiter yet. I was planning to use the science I got from the flyby to unlock better engines and allow a follow up orbital mission. I was planning to do a nice free return trajectory, but I seem to be having serious problems plotting what I am after. Ideally, I want a free return trajectory with the lowest possible perilune (for the science), that is less than 15 days from launch to reentry (life support), and especially a posigrade reentry. I've learned the hard way that even a lunar rated heat shield is generally not enough protection for a retrograde lunar return reentry. Delta-V is not really a barrier, as I have around 4 km/s in the transfer stage. I keep either getting retrograde reentry trajectories, or trajectories that barely enter lunar SOI and take 13+ days to complete. I guess I don't really understand how free returns actually work. I am also curious about the Apollo 13 trajectory, and specifically how the "PC+2" burn (that shortened flight time) worked. Thanks!
  10. ">View post on imgur.com">Album will appear when post is submitted apparently i also need help figuring out how to put an imgur album in here
  11. Okay, I have googled, and I have searched the forum, yet found no answer. Here's what it is: I play only sandbox, and I build funny little ships that I fly to the Mun, mostly. When I set up my return trajectory, I can see where it will hit Kerbin. But Kerbin will, of course, keep rotating. So I often end up burning huge amounts of ∆v in a last-minute course alteration just so that I can hit an ocean. If I don't use such huge amounts to first circularize and then set up a nice reentry. I can build my craft so that I'll be lugging quite enough ∆v for all of that. But I don't wanna. I don't need to hit an ocean. I know I can land on land, no worries. I know it was once undesirable to hit an ocean, if memory serves. But I am of the firm conviction that spacecraft that don't have landing gear go in the water. That's how I roll. Or splash and bob, as the case may be. So. What part of the game have I totally missed learning about? What mod did I not find? What is the trick? From what I understand, the Apollo spacecraft didn't exactly first circularize and then set up reentry. But were put on the right trajectory, right from the Moon. And even came down near the right aircraft carrier. If those pinkskins could do it, I'm sure the Kerbals should be able to, also. Problem is how to get me able to do it, also. I'm sure it's elemental, trivial, everybody knows about it. I suspect there might be something in the game I just have failed to learn about, inexcusable as that may be. So, as humiliating as this may be for me. Please somebody explain to me how I can aim for an ocean from the Mun. Thanks.
  12. I've been playing in a career save for a while, but recently I've started noticing that spacecraft landed with the same anmount of ablator they had at launch. I've done some testing and it turns out that nothing is destroyed on reentry at all (at least not from overheating). I have no idea what caused this. I've even tried deleting all the mods (which makes all the spacecraft in orbit incompatible, but still...). Can anyone help me out with this? The save file There is a long list of mods I'm using, but as I've said, the issue appears without them too
  13. Nothing to see here. Move along. Maybe go install "Trajectories" and, in map view, zoom out.
  14. Okay, so in pursuit of orbital tourism contracts in my first career game, I designed my first spaceplane. Not a HOTOL SSTO, just a fancy-looking Dynasoar equivalent -- boosted vertically, maneuvers in orbit with a rocket motor on the aft end, reenters and lands more or less like a Space Shuttle (except parachute recovery at the very end, because my R&D hasn't produced retractable landing gear yet -- hey, give me a minute!). A little "simulation" testing (launch and revert) verified that the orbiter handles well enough in both boost and glide, and even reentry -- and a little tweaking on the booster got it under control during the early parts of boost, when there's a lot of aero force available on those wings (swivel engines and fins on the boosters FTW). Everything was great until I'd been reentering for five minutes or so -- starting from a 75 km orbit, I set up a periapsis of 48 km. I held approximately 30 degrees above prograde through reentry, though that tended to drift in a pitch-positive direction (because I was using heading hold while flying around Kerbin). When I was getting down a bit, I started to run low on battery, and since I had way too much fuel on board anyway, I ran the main (Swivel) engine at low throttle to get some power from the alternator, but I don't think the thrust was enough to contribute to the heating issue (well below what was needed for level flight in earlier atmospheric testing) -- but by the time I was down to 39 km, both the Mk. 1 Cockpit and the RCS sphere in the chin position were very close to their temperature limit (but the Crew Cabin, main wing, canard, and 800 fuel tank weren't even showing thermometers). That's the point at which I reverted the flight, hoping the problem was simply one of reentry profile. I'm aware that reentering too high will burn away an ablator with little braking effect, while going too low will overheat things and/or kill Kerbals due to excessive G loads; I'm sure there's a similar tradeoff in reentering a spaceplane. I just don't know what it is. Here's a VAB image of the vessel as flown. I've since pulled half the Lf/O out of the 800 tank (might replace it with a 400 tank, if that proves helpful, though I really need the length to keep the COM from moving too much as main fuel burns off), moved the monopropellant sphere inside a service bay (between the crew cabin and reaction wheel) and mounted a pair of batteries inside the service bay as well -- but I doubt that'll have much effect, other than improving my ability to make a couple orbits and still have electricity to operate the SAS and reaction wheels. Booster has Swivels on the core and the two boosters that also have fins, Reliants on the other boosters. Asparagus staging dumps the Reliants first, keeping the Swivel boosters until atmosphere is thin enough the wing doesn't want to make the stack flip end over end. The 10+ T orbiter reaches orbit with a full tank, if flown optimally, which means if I can lick the reentry this Taxicab generation could also fly tourists on Munar flyby missions. Would I be ahead to reenter higher, lower, or at a higher or lower angle of attack, or am I just approaching the whole spaceplane thing wrong?
  15. Sorry for the lack of screenshots: I'm not home a/t/m, but this has been bugging me. With sufficiently advanced tech and a bit of trial-and-error, I've been happy to find that landing capsules is pretty "easy button.": Enter a low (<100km) orbit Drop periapsis to 40km Turn on SAS Set SAS to keep the nose pointed retrograde Watch the lightshow pop the 'chutes. This is pretty much the same regardless of what other stuff I have hanging off the back of the capsule - cargo bays, empty fuel tanks, science containers, etc. With a heat shield, enough radial-mount parachutes, and a reentry speed <2600m/s, it's pretty safe. The problem is specifically when I have a "tourist box" consisting of a Mk1-2 command module on top of a hitchhiker container and a heat shield. Very simple, right? Except it wants to tumble - even with SAS on, it'll spend a good chunk of the reentry stuck about 20 degrees off-axis. I've got plenty of electricity. They're surviving reentry, and I know that any landing you can walk away from is a good landing, but I won't lie - it makes me nervous. Is there something inherently off-balance about the hitchhiker container? Is there a way to balance it better? Or maybe change the aerodynamics of it so it's more stable? (I could put on some reversed tail fins... or would that interfere with takeoff?) TIA
  16. I just lost an expedition (six tourists, one pilot) because the Hitchhiker exploded during reentry on the way back from the Mun, despite having a 2.5m heatshild directly attacked to it. Why did this happen?
  17. I’m currently designing an Eve spaceplane mission. I’m very excited for this mission and so far quite pleased with my craft. The mission profile looks like this: 1. SSTO from Kerbin 2. Refuel in LKO with fuel tanker (capable of Minmus refuel with ISRU if you’re not lazy like me) 3. Fly to Eve and land 4. Refuel on Eve with ISRU 5. Staged ascent from Eve, with only the cockpit eventually making it back to Kerbin. Anyway, I digress, none of this is too relevant to the question. My issue is that I cannot for the life of me reenter the plane on Eve. I will burn up every time seemingly regardless of my entry profile (shallow vs steep and several in-betweens). Are heat shields a must now? And how to put heat shields on a plane that’s supposed to SSTO from Kerbin without totally ruining the areo? Any help is appreciated. I will say I’ve had lots of fun looking at the firework show each time I’ve blown up the 150-part plane during my tests!
  18. So I remember atmospheric heating being a bit of a joke back when it was introduced in 1.0 - even with difficulty set to max and Deadly Reentry installed, it was child's play to survive reentry. However, I'm really struggling with the current version, and most of the threads I can find are either out-dated, unclear, or actually contradictory, so I have some questions. FWIW I currently have re-entry heat set to 100% and the latest version of Deadly Re-entry installed (although I'm not clear on how much difference that makes!) and am playing in the stock Kerbol system. How exactly does your trajectory relate to re-entry heating? The 'common sense' assumption seems to be that a shallower trajectory is safer, but I've also seen people argue that it exposes you to heating for longer, therefore total re-entry heating is greater. Is it basically the case that a steep trajectory minimises heating, while a shallow trajectory minimises speed and g-forces? How is re-entry heat determined? Presumably the higher the speed and the denser the atmosphere are the key variables. How exactly do angle of attack and your vessel's aerodynamics affect heating? What about mass/weight? Does having radiators affect re-entry heating at all? How exactly do heatshields work? Is there a certain temperature threshold at which they stop increasing in temperature and start burning ablator instead? What determines the rate of ablation? Why is it that once the ablator is used up, the part seems to explode instantaneously, rather than only when it reaches its temperature limit? What's the deal with spaceplanes? If I ever get above about Mach 3.5, I start exploding. Is this a simple function of velocity vs altitude/pressure? If so, is there a guide somewhere as to what speeds are safe at which altitudes? Does angle of attack make a difference, and if so how? What about the shape of your plane? Any tips for surviving EVE reentry? Do people generally consider reentry balanced at 100% reentry heat setting with Deadly Reentry installed? Should I just give up and turn it down? Or should I uninstall Deadly Reentry? Does anyone have any recommended thermal settings?. Really appreciate any help people can give, so thanks! Have a feeling there were some other questions I've forgotten as well... EDIT: Forgot to ask, are there other decent strategies for plausible re-entry vehicles besides heatshielded capsules and shuttle-style spaceplanes?
  19. It happened to Scott Manly and it happened to me a lot: The mk1 and mk2 cockpits burn up during reentry. Nothing seems to help. Maybe you can help by analyzing Scotts accident. It happened at 7:20
  20. So here is a question I have been trying to find an answer to but have had no luck. How does heat on the ship during re entry work? In the instance of heat shields or just standard non heat shielded parts, is it the lead point that takes 100% of the heat or is it heating any point at all that is not parallel to entry angle. Basically here is the back story that leads to my question. I am using stage recovery mod because I like the realism of being able to recover stages. Because of this each stage has parachutes and other things designed to slow down my stages. On my main stage (4 nerv's a orange fuel tank and some struts) I put 1.25s on top of the mark1 liquids and a 2.5 on top of the orange. during aero breaking with my pod attached the 1.25s that are set back a few meters from my pod but open to the elements were taking no heat (no ablator loss) but my lead point on the pod was. Is this how it works? To simplify I have a new stage I'm making (screen shot attached) will the engine take all of the heat and not the shields, or will the shields take the heat since they are also at a perpendicular angle to entry? Thanks in advance.
  21. HI I have a problem with my space shuttle when I going pack to the space center. When I enter a point around 40km to 30 km. I lose ful control of the shuttle and it is spinning and hurling. I have been using this shuttle for a very long time and never had a problem whit reentry. What are wrong and how do I fix it??
  22. I was playing ksp coming from minmus, but on re-entry, something wired happened. It refused to simulate drag. The spacecraft was at 900 m/s and accelerating at 2 km. Therefore, I couldn't deploy the parachutes.. Anybody else have this problem?
  23. Hello guys, how are you doing? I have started playing KSP two days ago and I can't express how much I am enjoying the game, not only the successful missions but the unsucessful ones aswell, in which I learn the most. At the moment I have put 2 rockets into orbit. Everything went fine with the first one, it landed perfectly (didn't explode lol). However, I am having a problem with reentering my second mission. The thing that differs the 2nd from the 1st is that the second one has a MK1 Crew Cabin for tourists. In the screenshots i've taken is possible to see my current orbit, fuel situation and the rocket itself. Problem: Once I lower the Periapsis to ~37km, I use the decoupler and wait for the reentry, always aiming retrograde. During the first moments everything runs ok. Though, in the middle of the process, the rocket starts to aim prograde, even with SAS on, pointing the aerodynamic part to the planet, screwing the braking which cause me to hardland and blow everything up. As you can see in the screenshots, I installed some wings in the rocket predicting unstable condictions during reentry due to the lenght of the last stage. However, I didnt expect it to be so tough and the wings to overheat during the process. I have already tried to not decouple and instead try to burn retrograde during the entry, but the engines tend to overheat. What do you people suggest me to try? Thanks for the help! SCREENSHOTS: (I don't know why, but the "Insert other media" isn't working.) http://imgur.com/Uf2VhLh http://imgur.com/CG83mem http://imgur.com/FoXZ4yN [Edited by Snark to provide inline images]
  24. A quick demo of how to hit KSC every time in a spaceplane. When you hold the angle of the nose about 7 degrees above prograde, you get the best gliding angle and your impact point will steadily move downrange of the initially plotted ballistic arc. The further you point your nose away from "best glide", the less this effect till, at large angles, it actually causes the impact point to move closer. Whilst you can pitch down, left or right to acheive this effect, i recommend UP because it takes you away from the thicker atmosphere and gives you a respite from re-entry heat. As you can see, this mk1 doesn't have much problem with re-entry heat. Possible reasons for this 1. Inline cockpit is quite far back. The fly by wire unit has a pointy antenna thing on the nose, that moves the bow wave well forward of the cockpit. 2. large wing area means it stays high until it has lost a lot of speed. 3. engine pre-cooler makes a good radiator. As do the jet nozzles on the rapier. these parts surround the cockpit.
  25. Hi, i have this SSTO that can go anywhere near Kerbin, but when i try to return and land, its almost impossible to control and land safely. As you can see, both CoM and Dry CoM are ahead of CoL, but upon reentry at some time the plane losses stability. Do you find what is wrong with the design? How could i solve it? Thanks And one more thing: The cockpit is always burning or almost at reentry, even having only heat setup at 70%