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Old 03-06-2011, 02:16 PM
snaquin snaquin is offline
The_Ripper
 
Join Date: Jun 2005
Location: Louisiana
Posts: 1,941
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Quote:
Originally Posted by CPMcGraw
I got very different results, Steve. Not sure if our starting conditions are similar, but here's what I got on the single-engine version:


B4-4......Alt 275' - 291'......Dv 11 FPS - 23 FPS
B6-4......Alt 290' - 300'......Dv 8 FPS - 18 FPS
C6-5......Alt 642' - 688'......Dv 19 FPS - 39 FPS


Best engine for low Dv is the B6-4.

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For the two-engine version, I get the following results:


A8-3......Alt 270' - 275'........Dv 3 FPS - 10 FPS
B4-4......Alt 594' - 607'........Dv 7 FPS - 19 FPS
B6-4......Alt 603' - 614'........Dv 7 FPS - 17 FPS
C6-5......Alt 1168' - 1199'......Dv 12 FPS - 29 FPS


Best engines for low Dv are the A8-3 and B6-4.

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I ran 10 simulations for each engine. All engines reached safe flight V from a standard 36" x 1/8" rod.


I accidentally left my settings as set to deploy at apogee, instead of deploy at ejection. I'm now right in the ballpark with what you show here .....

Not sure why I changed those settings in the first place but I'm dusting off some old files to hopefully get up to BARCLONE so I'll know what to look for if all my sims appear to be flown in a perfect world! I figured it had to be an "apogee" setting of some sort since engine delay changes didn't alter the altitude results.

Thanks!

.
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