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Old 09-13-2006, 03:26 PM
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CPMcGraw CPMcGraw is offline
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
Exclamation New Plan -- SmallJet 313

With all of this EnerJet talk and the really cool designs they seem to be, I figured it was time to come up with a "poor boy's EnerJet". This version uses three 13mm A3-4T motors and puts in a respectable 438' altitude. The Dv is less than 15 FPS, and the launch guide length is less than 36", so we're not talking about major launch towers here. I just used 3/16" diameter lugs instead of 1/8" lugs...

Two pieces of SEMROC ST-1380 form the upper body with a BC-1344 nose cone. Three ST-5120 tubes form the motor cores. Fins are cut from 3/32" balsa. No motor hooks, just simple friction-fit with masking tape. Two 16" diameter parachutes bring the rocket back down safely.

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File Type: rkt SmallJet 313.rkt (144.6 KB, 99 views)
Craig McGraw

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