01-18-2009, 12:37 AM
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BARCLONE Rocketry
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
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Quote:
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Originally Posted by rkt2k1
Well I reworked the Bulldog with a 24mm engine mount and got much better performance numbers. Does a modification to a manufacturer design count as a Barclone entry?
... Bill
Design Name: Centuri Bulldog with 24mm Engine Mount
Length: 20.5"
Diameter: 2.217" (BT-70 / ST-13)
Fin Span: 6.967"
Weight: 4.822 oz (with 2oz nose weight and less engine)
Engine Size: 24mm
Launch Guide Length: 48" x 1/8"
Motor......Max Altitude......Dep. Velocity
Motor.....Max Alt......DV...
D12-5......735.91.......3.48
E9-6......1236.72......10.89
E30-7.....1727.58.......7.47
E15-7.....1808.73......11.03
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It does. 
Those numbers are a lot better. The general rule-of-thumb goes something like this:
Over 25 FPS = Chute-shred territory.
Less than 20 FPS = Good, but not best. Can still inflict explosive chute openings and broken shrouds.
Less than 15 FPS = Better, and similar to most kits now available.
Less than 10 FPS = Great! Very few hard pops.
Less than 5 FPS = Smooth operator!
Less than 3 FPS = Perfection! |