Spacecraft3 query

[n0mad23]

Hi all,

In Vinka's Spacecraft3, the Aerodynamic feature is supposed to allow defining "shuttle," "Delta-G," and "capsule" under MODEL for default values.

However, after digging through the Orbiter API reference for 2006, I see nothing to suggest this is still supported. Is this a remnant of the previous Orbiter version (Spacecraft3 was designed for 50126), or am I missing something.

I've tried using the MODEL=CAPSULE in an .ini file, but Orbiter crashes every time I bring my craft into the atmosphere.

 

[GregBurch]

Hi all,

In Vinka's Spacecraft3, the Aerodynamic feature is supposed to allow defining "shuttle," "Delta-G," and "capsule" under MODEL for default values.

However, after digging through the Orbiter API reference for 2006, I see nothing to suggest this is still supported. Is this a remnant of the previous Orbiter version (Spacecraft3 was designed for 50126), or am I missing something.

I've tried using the MODEL=CAPSULE in an .ini file, but Orbiter crashes every time I bring my craft into the atmosphere.

Every time I've tried to use those, I get Bad Results. I think they must not be supported.

 

[Eagle]

The capsule model isn't currently implemented. You have to use the other models and be experimental with the aerodynamic parameters to approximate what you want. If you put the wings/control surfaces forward of the vehicles center of gravity, it will fly backward like a capsule.

EDIT: Also, you can approximate a parachute with a very large speedbrake, and then link that to an animation for the visual effect.

 

[n0mad23]

It is a capsule I'm working on. See pics here to see what I'm up to: http://orbiter-forum.com/showpost.php?p=38331&postcount=186

Tblaxland's coding the project in C++, but I find for the creating the rough draft Spacecraft3 is a nice way to go. I guess I'll have to do some more research into the aerodynamics of capsules so I can implement it via SC3 before turning it over to Tblaxland.

 

[Eagle]

[AERODYNAMICS]
VAIRFOIL_ATTACK=(0,0,0.5)
VAIRFOIL_CHORD=3
VAIRFOIL_AREA=20
VAIRFOIL_ASPECT=0.5
VAIRFOIL_C0=5
HAIRFOIL_WAVE_DRAG = 5
HAIRFOIL_ATTACK=(0,-.1,0.5)
HAIRFOIL_CHORD=3
HAIRFOIL_AREA=20
HAIRFOIL_ASPECT=0.5
HAIRFOIL_C0=5
HAIRFOIL_WAVE_DRAG = 5
AILERON_AREA=.01
AILERON_LIFT=0
ELEVATOR_AREA=.01
ELEVATOR_LIFT=0
ELEVATOR_ATTACK=(0,0,0)
RUDDER_AREA=.1
RUDDER_LIFT=0
RUDDER_ATTACK=(0,0,0)
SPEEDBRAKE_DRAG=400
SPEEDBRAKE_ATTACK=(0,0,2)
SPEEDBRAKE_ANIM=0

Here are the aerodynamics for my capsule in my NLSSTO project. Feel free to use as a basis.

EDIT: This is for a 5050 kg spacecraft. You may need to adjust them to correct for your spacecraft's size and weight.

 

[n0mad23]

Eagle!

You're my newest hero! Thanks, and I'll paste the code into my .ini file immediately.

Thanks all for such quick responses.

Cheers

Edit: After seeing your edit, Eagle, I see that modifications will indeed be necessary. I've designed the Tortoise capsule to be closer to 20,000 kg. Still, it's a fabulous snippet you've handed over. This will save me SOOOOOO much time.