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Project Apollo - NASSP 6.4.3 released!
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| | | |-+  Changes for launching Apollo "heads down".
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Author Topic: Changes for launching Apollo "heads down".  (Read 2555 times)
chode
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« on: March 11, 2005, 12:33:38 AM »

I've figured out the changes required to launch Apollo "heads down", as it was done in the real Apollo. I wanted to give notice to developers and allow for more comments before I commit the changes because it requires a change in the autopilot and a change in all of the scenarios. If you change one and not the other, then the autopilot will certainly crash your vehicle. So,  when you update to the changed autopilot (once committed), make sure that you update the scenarios as well.

The scenarios are changed so HEADING is 270 instead of 90.
The autopilot is changed so all pitch and yaw corrections are the opposite of what they used to be (plus to minus, minus to plus). From the testing I've done, it seems to work as expected. The trajectory is the same as before,  just now you are oriented heads-down (like the Shuttle), rather than heads-up.
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chode
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« Reply #1 on: March 11, 2005, 12:47:23 AM »

After writing this, I had an idea. It might be possible to make the autopilot work with both scenario file headings by "adapting" to the heads-up (HEADING 90) or heads-down (HEADING 270) initial orientation.
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NoName
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« Reply #2 on: March 11, 2005, 06:59:26 AM »

Hey thats great chode!  Very Happy  

I ever wondered why NASSP launches "Heads Up". But I never figured out how to change this to "Heads Down". Thats why I'm not a good programmer  Wink

see you
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chode
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« Reply #3 on: March 11, 2005, 01:32:14 PM »

I commited the changes to saturn5ap and the Saturn 5 scenarios

The revised launch autopilot should work for both heads-up and heads-down launches.
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Tschachim
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« Reply #4 on: March 11, 2005, 02:10:01 PM »

Very cool, a first quick test was fine! A big step towards more realism!  Very Happy  Very Happy  Very Happy
A small "cosmetic" comment: If you start a launch pad scenario you are on the other side of the Saturn, of course, and look at the "shadow dark side" of the Saturn, perhaps it's nicer to change the external camera position as well, but this is not very important, I think.

Thanks and Greetings
Tschachim
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chode
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« Reply #5 on: March 11, 2005, 02:57:17 PM »

Thanks for the comments. I went ahead and changed all the camera positions back to the eastern side.
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Yogenfrutz
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« Reply #6 on: March 11, 2005, 06:00:39 PM »

Very good indeed.

again one step closer to "the real thing"

Yogenfrutz
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Tschachim
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« Reply #7 on: March 11, 2005, 06:14:30 PM »

Now it's perfect!  Very Happy
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