Optimal orbital insertion from flight

[icedown]

Ok, I'm still working on the autopilot for the G42-200 still haven't got the final stage figured out yet. Launch to T3 is going good. I still need to refine the heading but getting the craft into orbit is still eluding me. I know how to calculate what speed I need to be at what altitude, but determining how to get there has got me stumped.

I'm at 60km, mach 17. I can't pitch up to much at first because I'm still in the atmosphere but I'm still to shallow to go for a pure prograde burn. Ideas?

 

[Urwumpe]

Did you already look at Powered Explicit Guidance or Unified Powered Guidance?

 

[Phil Smith]

Ok, I'm still working on the autopilot for the G42-200 still haven't got the final stage figured out yet. Launch to T3 is going good. I still need to refine the heading but getting the craft into orbit is still eluding me. I know how to calculate what speed I need to be at what altitude, but determining how to get there has got me stumped.

I'm at 60km, mach 17. I can't pitch up to much at first because I'm still in the atmosphere but I'm still to shallow to go for a pure prograde burn. Ideas?

the key factor after velocity is pitching program. i've spent about 3-4 days playin with pitch angles and angle velocity to make my vehicle into orbit.

 

[Urwumpe]

http://www.orbiterwiki.org/wiki/Powered_Explicit_Guidance

 

[icedown]

Ok, I see. I understand the logic and process behind it. Now to figure out how to get the data and work those equations into the autopilot. I wish I had taken calculus now. :beathead: