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  #1  
Old 11-21-2010, 05:07 PM
Feyd's Avatar
Feyd Feyd is offline
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Default New Design - Double Shot

Actually, I don't know if I designed this or got it from somewhere. But I didn't see the name in this forum.

It's a great dual 24mm cluster that puts in some high flights and good DV numbers,

I'll be building this one after Thanksgiving - I've already ordered what I need from Apogee.

Enjoy!
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Name:  Double Shot Sims.jpg
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Attached Files
File Type: rkt Double Shot.rkt (55.8 KB, 61 views)
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Dale Marshall, San Antonio Texas
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  #2  
Old 11-21-2010, 08:16 PM
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CPMcGraw CPMcGraw is offline
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Default

Nice design. Has that Estes Avenger look to it...

Have you double-clicked on the simulation results to see the Launch Guide Data in the full summary? The C11 and D12 need a 48" rod, rail, or tower to reach safe flight V, while the E9 needs more than 60 inches of guide length.

OTOH, if you're willing to beef up the recovery components and reef the chute, try upping the engine power to dual E18, E28, or E30. All three of these need less than 30 inches of guide (a much better "get-up-and-go"), and punch it to 1600'...
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  #3  
Old 11-21-2010, 08:56 PM
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Feyd Feyd is offline
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Good catch, I forgot to check that. I've redone it a little with smaller fins. Higher DVs, but reasonable launch rod lengths (46" on the E9s). C-11s give pretty high DVs so I wouldn't recommend those.
Attached Files
File Type: rkt Double Shot II.rkt (56.5 KB, 64 views)
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Dale Marshall, San Antonio Texas
NAR #90990
Semroc SAM #083

BAR Since 2008
Enjoying model rocketry since 1977.
The Spotted Dragon
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  #4  
Old 11-21-2010, 09:02 PM
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Feyd Feyd is offline
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Just for fun, I made it a triple 24mm cluster. Got some GREAT height numbers, very good DVs and exceptional DVs.

Enjoy! Again!
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Dale Marshall, San Antonio Texas
NAR #90990
Semroc SAM #083

BAR Since 2008
Enjoying model rocketry since 1977.
The Spotted Dragon
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  #5  
Old 11-21-2010, 09:02 PM
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Feyd Feyd is offline
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Ok, ok, here's the RockSim file
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File Type: rkt Triple Shot.rkt (58.7 KB, 80 views)
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Dale Marshall, San Antonio Texas
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Semroc SAM #083

BAR Since 2008
Enjoying model rocketry since 1977.
The Spotted Dragon
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