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luckyhendrix

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Posts posted by luckyhendrix

  1. I normally switch modes just below 30,000m. The jets are down to about 10kN each by then.

    About 1.5 shock cone equivalents per engine (i.e. one shock cone plus a nacelle or a few structurals) normally does me for intakes.

    It amazes me that you manage to reach Mach4.5 before switching, if I stay at Mach3 at 22km for more than 30sec, my craft burns up :/

  2. So with these plane equipped with SABRE. What is typically the maximum altitude/speed you go before switching to closed cycle mode ? Do you you level off flight at high altitude to gain a maximum of speed in breathing mode ? or do you always climb, and simply switch to slosed cycle when there is no air left ?

    Alos , how do you know how much intake you need ?

  3. Well I still have problems, with my SSTO, I don't like using stock airbrakes, they feel so cheaty :/.

    I would be really interested if someone could show me a design that can fly for a relatively long duration of time at Mach 3 like the SR71 (by that I mean at least 10 minutes). Now with the heat I have to completely rethinkt my spaceplane ascent profile, because spending too much time accelerating past Mach 2.5 is deadly

  4. Hello, does anyone have a SSTO mk2 size plane that can reenter without burning up ?? my craft here cannot reenter anyway I try ... I've tried very shallow reentries and more aggressive, but even with the very shallow one my carft burns up at 35km even before the flammes effect appear with just 3kPa of dyn pressure :/

    The only way I managed to reenter this was by pointing it backwards ! Once it hit 40km it started stalling and doing flips, but it finally reentered without burning up ...

    3D087E8DD82DD3F1165812FE9127EC0BC32D6927

  5. If you actually sat through the whole video you probably saw the following things:

    -Aircraft losing control after touchdown at high speeds.

    -Aircraft taking a long time to slow down.

    -Aircraft requiring high touchdown speeds.

    -Aircraft easily losing directional control while turning.

    -Aircraft required long distances to brake.

    Absolutely none of those things have to do with FAR or the aerodynamic model ...

    -Aircraft losing control after touchdown at high speeds.

    Well maybe it is not a good idea to drive at very high speeds on a tiny tricycle landing gear, and has nothing to do with aerodynamics

    -Aircraft taking a long time to slow down.

    Again nothing to do with aerodynamics, see wheel brakes

    -Aircraft requiring high touchdown speeds.

    Well that's what happens when you have an heavy aircraft with tiny wings, it would be even worse without far beacuse of lack of body lift.

    -Aircraft easily losing directional control while turning.

    It only happened once because scott manley clearly overturned and stalled the aircraft. It would be a lot easier to fly if he didn't use the SAS and turned FAR AOA limiter on and/or used a joystick for smoother control.

    Also, same thing will happens to stock aircraft unless they have massively overpowered SAS

    -Aircraft required long distances to brake.

    Again nothing to do with FAR

    Otherwise I really like your suggestions and think they should be added. But trying to make a huge booster fly with tiny wings is always going to be a challenge ...

  6. I have had the same problem with Xw with some craft , yet it did not seems to make the aircraft uncontrollable.

    It tried to look up what affects Xw but with not luck.

    Note that the situation you're simulating : mach5 with sea level air density (1.2) , is almost impossible to reach.

    Generally if you reach mach 5 you are already at the edge of the atmosphere.If your plane is stable when air density is around 0.1 and at Mach 5, you should be fine.

    I think it is impossible to have a plane stable for "all speed", that is, all altitude-speed-fuel levels combinations.

    But it should be possible to design a plane that stays stable under all normal flight conditions it has to go trough to complete its mission.

  7. I have a problem with these winglets that won't get shielded by the fairing :(

    Here is a screen before putting the fairing : http://i.imgur.com/5bwhUzc.png

    and after : http://i.imgur.com/z4Pf4g7.png

    The griders and other parts switch from isshielded: False to True when putting the fairing , but not the two winglets and two procedural control surface.

    I tried other configuration and oversizing the fairing, but those control surface don't switch to shielded :/

  8. Hello,

    I have a made a plane to explore Duna (link : https://www.dropbox.com/s/y0qn9s1qxppsgno/Capture%20d%27%C3%A9cran%202014-06-04%2018.26.32.png

    ), because of it's huge wingspan I can't put it atop of a rocket (also because I like to complicate things :P).

    So I planned the thing so that the plane is separated in three sections with docking ports, I'll send this up individually and assemble in orbit.

    But how can I assemble these ? weight of the plane must be low , so I can't add RCS to the modules.

    I thought about making a tiny tug ( basicaly a RCS fuel tank + probe core + RCS with a docking port on each side, but I won't be able to complete the plane because I can't grad the last module.

    So how can I dock these ? can a kerbal push in EVA while holding a ladder? an ideas ?

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