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Feb 18, 2004, 10:02 PM
AMA L68621; WA2LLX

Gearbox ratio's for Hobby Lobby's JR B-25

JanR B-25 from HL. Specifications: Length 40.5, Wingspan 53, airfoil Selig 3021, wing+stab area about 510, weight 50 oz., wing/stab loading 14 oz./sq. ft.

I have two 7.2V Speed 480BB Race motor's set aside for this model. I want to use them with 8 cell battery pack's. I also have 2 each MJ8051(3.33:1) and 2 each MJ8061(3.8:1) gearboxes. What reduction ratio and prop size is best suited to this model?

Thank's much,

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