SSU Development thread (4.0 to 5.0) [DEVELOPMENT HALTED DUE TIME REQUIREMENTS!]

DaveS

Space Shuttle Ultra Project co-developer
Addon Developer
Donator
Beta Tester
Joined
Feb 4, 2008
Messages
9,169
Reaction score
434
Points
173
I've done some more research into our a first stage performance problems I and through alot of trial&error this is what I have discovered. This is a direct quote from my latest entry in ticket#20:

"I think I have nailed down the issues to differences in Low Q vs High Q (Performance Enhancement) pitch tables (High Q is slightly more aggressive), Adaptive Guidance Throttling (AGT) being off (it throttles down and causes multi-step throttle downs when it shouldn't) and finally us not having the historical throttle bucket numbers for the missions as well as the historical payload masses.
Points 1 and 3 have been identified by me through several 1st stage ascent runs of STS-107 using historical throttle bucket figures and payload masses."

So it is a four-factor problem:
1: Pitch tables not being the same for Low Q ascents and High Q ascents (Addressed by me in r.3285)
2: AGT most likely targeting a Low Q number which causes multi-step throttle downs
3: Our scenarios not having the historical payloads with their correct masses (STS-107 addressed by me in r.3285)
4: Our mission files not having the historical throttle bucket numbers, causing either late or early throttle commands easing the loads (STS-107 addressed by me in r.3285)
 

DaveS

Space Shuttle Ultra Project co-developer
Addon Developer
Donator
Beta Tester
Joined
Feb 4, 2008
Messages
9,169
Reaction score
434
Points
173

n72.75

Addon Developer
Addon Developer
Tutorial Publisher
Donator
Joined
Mar 21, 2008
Messages
2,083
Reaction score
492
Points
98
Location
Biddeford ME
Website
mwhume.space
Preferred Pronouns
he/him
Yeah, unless you're planning a release for 2016/R90/OS5, pausing development makes perfect sense.
 
Top