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Reusables

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Everything posted by Reusables

  1. Reusables
    Try Pe of 38km, it takes some time to reenter but anything with heat tolerance over 2000K won't burn up.
  2. Reusables
    Sorry, I'll be offline for a day from now on. But that's orbit just under mun SOI, so it should be the best one under the mun orbit.
  3. Reusables
    What about something like this? If your sat has 250m/s of dv. By the way, mun has really huge SOI.. EDIT: Got a better one: Mun magic!
  4. Reusables
    Yes, the correction burn doesn't cost lots of dv. I'll show you how to get those orbit.
  5. Reusables
    Of course you can get there with my lfiter as well, if you are okay with inclination. For that just skimming mun SOI may be okay.
  6. Reusables
    You can adjust your orbit, right? Look at the image, if you have nearly 100m/s of dv you can get higher to minmus orbit. Also I can recover my second stage, it's perfectly feasible if both Dangit failure does not strike too early. Look at the image. Or do you want it to be separated after it reaches the orbit you want?
  7. Reusables
    This is fine, right? @TheEpicSquared (Holding payload in front of fairing) Then, I have over 940m/s on LKO. But I recommend using your probe to do some correction burns, as I want my second stage to return. I'll just get you to just before mun encounter in this case. (Also SOI escape is easy to get accidentally from there) + Actual Mun Encounter Second stage recovery is perfectly feasible here:
  8. Reusables
    Mun Flyby also can circularize the orbit. Also higher orbit needs less dv to circularize as well.
  9. Reusables
    Why can't you burn from the periapsis, to escape the SOI? At least it will guarantee higher orbit than By the way, I can get 0.85t~0.9t to Mun transfer orbit, so gravity assist is possible. Escaping the SOI is possible with it as well. I'd test how far it can go with the payload.
  10. Reusables
    You mean you can lift the two at once? But mine is 8000(40%) cheaper overall! (6000 per each launch) @StupidAndy, how do you think?
  11. Reusables
    It looks like your sat has over 1.15km/s of dv on its own. My Retrance ll2 can lift 1.1t to keostationary transfer, so the 0.85t sat should be able to either circularize/get out of the SOI. Costs 6000*2 = 12000, isn't it a fine deal?
  12. Reusables
    I've uploaded the craft file on dropbox, which can be downloaded through the same link. I want to update the first iteration. (It also has abort mechanism)
  13. Reusables
    https://docs.google.com/spreadsheets/d/1FAWGoiUAasr3gukWhhTMjGIQSKcoWXPhvbyM_6E2u3U/htmlview This is a spreadsheet I made a while ago, to compare economy of each LF/Ox engines. It gives theoretical limit of cost per ton and payload fraction. Use this to compare between engines, determine ideal fuel fraction and find how good your rocket is.
  14. Reusables
    Then can I update the first iteration by just putting a few fins on the rocket? EDIT: Also I have some errors on balance calculation, I thought it costs 3000 per launch but the better calculation gives 3909. Can I raise customer cost to 6000?
  15. Reusables
    Can I have a slightly modified launch vehicle for other purpose as the same iteration? (e.g. add fins and fuel tank) Just a matter of moving fins/RCS and adding/replacing some fuel tanks.
  16. Reusables
    Hi, Is there some reason why FMRS got disabled after stage separation on this craft? Or is this a bug? Mods with possible effect: KER, PersistentRotation, DangIt, Kerbalism, MechJeb2 (I have a mechjeb probe module on the second stage) I'll post logs and craft file when it's needed. EDIT: It seems that it only works when the root part is a probe / command module.
  17. Reusables
    It's because you're intermixing the two engines. Wheesley is optimized for subsonic flight with maximal thrust on mach 0 and mach 1, and the thrust diminishes quickly over mach 2. On the other hand, whiplash is optimized for mach 3~4. Combining these two thrust 'hill's, you can get the twin-hill shape with a lump on stationary state(Wheesley at Mach 0).
  18. Reusables
    Replace the rockomax(2.5m) decoupler with 1.25m one, it's too draggy for the purpose. Otherwise it looks okay albeit overpowered for its purpose. As you have a lot of thrust, you should perform gravity turn early. Try hard to turn 5 degrees just after engine ignites, and hold prograde after that. + I think you can land on minmus several times with the lifter.
  19. Reusables
    Hi, I made a launch vehicle capable of lifting 2t to LKO. With slight modification, it will also be able to lift 0.6t to geosynchronous orbit & 0.9t to mun intercept orbit. Selling on cheap-ish 4000, sign the contract before my budget runs out!
  20. Reusables
    Made a lander with low-tech rover in the cargo bay. Who need command seats when you have ladders?
  21. Reusables
    Do I need to fly a demo flight to be listed as LP with my launch vehicle? Then how can I request planning a demo flight?
  22. Reusables
    RCS. It adds a bit of cost, but certainly worth it. (for recovery) EDIT: Anyone knows how to fix FMRS when it don't want to record stages? It just disable itself...
  23. Reusables
    Here goes my first generation reusable lifter: Retrance ll2 Stock craft with only modded parts being MechJeb2 module. Payload capacity: - 2t to Equatorial LKO.(90~110km) (1.9t to ~150km) - 1.6t to Polar LKO. (90~110km) - 1.1t to Geostationary transfer orbit. - 0.85t to Munar Transfer orbit. Selling on 4000 6000, launch your payload before my budget runs out! Total Weight: 16.720t Dimensions: 18.6m X 1.8m X 1.8m Payload Mount Instructions: Flight instructions: EDIT: Done the test, with a few fixes. EDIT2: Updated the craft & instructions. @TheEpicSquared
  24. Reusables
    Can I recover stages splashed on water? Also is offseting decoupler in cargo bay allowed? Staging will be simulated with deployment of interstage fairing.
  25. Reusables
    Gravity drag tends to play major role on ascent, as it consists at least 1km/s from 3.4km/s of dv to LKO. If you don't hit the sonic barrier too fast, aerodynamic drag won't be too big (typically under 100m/s for streamlined ones) In my experience, the major drawback for high TWR is often the price of the engine - which is one of the most expensive parts. Also they comprise quite a bit of the dry mass of the first stage. Thus reduction of engine gives more dv in less cost. Though I don't think TWR under 1.3 will be better. Compared to TWR 1.5, it will need about 1.7 times more time to fight the gravity drag.
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