Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

TT42 GP Extended

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Old 06-11-2003, 03:04 AM
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Joe Trinkley
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Default TT42 GP Extended

Well here it is, made out of 4mm coroplast, 3 HS-81 servos, 1 Thunder Tiger GP42 Bushing engine, 1 270 mah battery and an r700 Jr reciever. 24" wingspan, 20" chord and weighing in at 1.9 pounds.

So tell me what size prop to get max speed out of it and how fast is that?

This is hand launchable right?
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Old 06-11-2003, 03:06 AM
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oh yah, fins are 8 inches high and 7 inches deep and the cg is at 6.75 inches. Where should I start out my elevon throws at...i'm guessing around 1/4 inch?
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Old 06-11-2003, 03:06 AM
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Thanks guys for all your help, you have really been helpful to me!
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Old 06-11-2003, 01:47 PM
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come on cab, whats your opinions
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Old 06-11-2003, 01:48 PM
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and I think I will put the drain pipe on there, possibly altered to have a pointed descent to the motor
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Old 06-12-2003, 11:15 PM
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Default TT42 GP Extended

nice one joe.
you could cut the fins down a bit if you want, they are bigger than they need to be, up to you!
try a 10x6 for first flights and then maybe a 9x7.
remember what i said about the glide-dont try to stretch it!
get someone to launch it for you first flight and after it is trimmed its easy to do it yourself-underarm holding the gutter.
as for throws-on my solo test fright i had 3/8" up/down on elevons on low rates after launch- for fun i had about 1.5" and plenty of expo! twinkle rolls
good luck
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