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Old 08-16-2008, 09:58 PM
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CPMcGraw CPMcGraw is offline
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
Exclamation New Plan -- Yellow Bird

Another "Schoolyard Sounder" for 13mm motors.

It's always interesting to see what a simple design can do when it's loaded up with a 13mm motor. Never underestimate the power in an "A" class motor!

Length: 14.775"
Diameter: 1.04" (ST-10)
Fin Span: 5.04"
Weight: 0.87 oz

Using 1/8" balsa fins:...A10-3T......315'......Dv 7.2 FPS.......36" x 1/8" rod
Using 3/32" balsa fins:..A10-3T......334'......Dv 9.8 FPS.......36" x 1/8" rod
Using 1/16" balsa fins:..A10-3T......350'......Dv 11.6 FPS......36" x 1/8" rod

The A3-4T will work, but the Dv is much higher, and the altitude isn't much better. Use the A10-3T.

Enjoy!

Magic Number is now 32...
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