Atreides Posted July 29, 2011 Share Posted July 29, 2011 Here's a 12 minute video I made which shows how to get into a circular orbit at a specific height and back again: I hope it's useful. Here's the description that is shown in the video:Getting the crew where you want them and back:1. Get into a low orbit2. Make the orbit circular3. Get to the desired altitude (using a Hohmann transfer orbit)4. Get back to about 50 km (using a Hohmann transfer orbit)5. De-orbit1. Get into orbit-Launch-At about 10 km slowly start lowering the nose in the desired heading (in this case 090). -The horizontal speed should be at least 2349 m/s at 40 km.2. Make the orbit circular -Likely you're now going up in an epiliptical orbit. Calculate the orbit-speed of the altitude you expect to be at at apoapsis (highest altitude relative to Kearth).-If you overshoot try again at the new apoapsis. 3. Get to the desired altitude (using a Hohmann transfer orbit)-Calculate the speed needed to reach the desired altitude -Example: Altitude 60.000 m -> 300.000 m (altitude of ISS) Required acceleration 2312,8 m/s -> 2484,4 m/sAt apoapsis accelerate-Example:An apoapsis of 305.690 m requires 1980,6 m/s for the orbit to become circular.4. Get back to about 50 km (using a Hohmann transfer orbit)-Going to a lower orbit enables landing to be more precise. It doesn't take extra fuel since the burns involved are 2 deceleration burns. -An altitude of 50 km allows you to overshoot slightly without entering the atmosphere.-Example: Altitude 305.200 m -> 50.000 mRequired deceleration 1974,9 m/s -> 1805,6 m/sAt periapsis (lowest altitude relative to Kearth) decelerate.-Example:A periapsis of 48.790 requires 2332,7 m/s for the orbit to become circular.5. De-orbit. -Use your remaining fuel.Made by AtreidesYoutube-channel: EagleNEDPrograms used:Kerbal Space Program v 0.8.5 http://www.kerbalspaceprogram.com/Kerbal Space Program Calculator v 0.8.1 (by Warringer) Link to comment Share on other sites More sharing options...
Dani-Sang Posted July 29, 2011 Share Posted July 29, 2011 Good tut. Link to comment Share on other sites More sharing options...
comando222 Posted July 29, 2011 Share Posted July 29, 2011 Nice, thanks for helping.I'm new and just learning Link to comment Share on other sites More sharing options...
Atreides Posted July 30, 2011 Author Share Posted July 30, 2011 No problem. Glad I could help Link to comment Share on other sites More sharing options...
Ordosis Posted July 31, 2011 Share Posted July 31, 2011 Thanks for the thorough guide. Link to comment Share on other sites More sharing options...
Atreides Posted August 3, 2011 Author Share Posted August 3, 2011 You're welcome. Link to comment Share on other sites More sharing options...
CairAndros Posted August 12, 2011 Share Posted August 12, 2011 Hey, nice video Only thing is, and I might sound like an idiot here, but I can't figure out the engine/fuel cell combo you're using for your central stack - any chance you'd be able to tell me? =]Thanks =] Link to comment Share on other sites More sharing options...
Atreides Posted August 13, 2011 Author Share Posted August 13, 2011 Thanks. To answer your question; in the hangar, at the stage overview to the right, I put all engines and fuel compartments (don't know if it suffices to only do this with the engines) in the first stage to fire, so the liquid fuel engine fires simultaneously with the 6 solid rocket boosters. Link to comment Share on other sites More sharing options...
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