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Old 06-18-2012, 11:07 PM
gdjsky01 gdjsky01 is offline
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Default New Design - Deucey 2.5 24/24mm Two Stage

Based on the original Deucey by Craig - especially the fin planform. Two rocksim files. One with, one without a recording altimeter in the payload bay.
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  #2  
Old 06-19-2012, 12:41 AM
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CPMcGraw CPMcGraw is offline
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The booster "stage" is a slip-over friction fit on a pair of taped engines, right? No coupler (obviously, since it's a BT-50 main tube...) of any sort.

The D12-0/D12-7 and C11-0/E9-6 combos appear to have the best Dv numbers. With a bit of trimming (or lengthening), I bet you could get those numbers down to something even more comfortable (lower Dv is nearly always better ).

Nice plan!
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  #3  
Old 06-19-2012, 12:52 PM
gdjsky01 gdjsky01 is offline
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Quote:
Originally Posted by CPMcGraw
The booster "stage" is a slip-over friction fit on a pair of taped engines, right? No coupler (obviously, since it's a BT-50 main tube...) of any sort.

Correct

Quote:
Originally Posted by CPMcGraw
The D12-0/D12-7 and C11-0/E9-6 combos appear to have the best Dv numbers. With a bit of trimming (or lengthening), I bet you could get those numbers down to something even more comfortable (lower Dv is nearly always better ).
Nice plan!


I take deployment numbers with a grain of salt. Yes I use them. But as a rough guideline. There is a good +-15% or more in those numbers just based on ROCKSIMs idea of CD versus reality and of trajectory.

I try and make very very long, robust, deployment harnesses. I am NOT saying one should launch with a ridiculous chute shredding C11-3 or D12-5 in upper stage or anything silly like that. I am saying I am will to live with Dv's from ROCKSIM higher than I've seen on BARCLONE based on my own experience.

Of course YMMV.
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