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Old Mar 05, 2007, 07:36 PM
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for 3d it is always desirable to use large props, 2 main reasons :

a) A more powerfull gyroscopic efect makes high alpha (sub stall) flight easier because the hole plane acts more stable and predictable
b) The big disc of air makes your moving surfaces more effective at 3d

I think the difference is quite big
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