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Bit of background, i got 2 wheel chair motors (cheers woody 
) , they where too weak for a HW so i want to use them in a FW, they where right angle gear head motors that had an output speed of 113 rpm, way too slow for a FW (without silly big wheels) that and the gearboxes where knackered.
It is a 30:1 gearbox so the motors are 3390 rpm (which sounds about right), I am getting an 8 tooth sprocket for the motor and a 40 tooth sprocket for the wheels , i put it all into this calculator and it says 8mph(8 mph is ideal BTW
) ???
http://www.diygokarts.com/speed-calculator.html
That cant be right, Im thinking ive missed something here because if this is about a 4:1 ratio and the old gearbox was 30:1 there would be a lot of difference but the difference is only a few mph (3 to be precise). Ive done something wrong here but for the life of me i cant see what, and i dont want to order stuff until i know its gona work
thanks
) , they where too weak for a HW so i want to use them in a FW, they where right angle gear head motors that had an output speed of 113 rpm, way too slow for a FW (without silly big wheels) that and the gearboxes where knackered.It is a 30:1 gearbox so the motors are 3390 rpm (which sounds about right), I am getting an 8 tooth sprocket for the motor and a 40 tooth sprocket for the wheels , i put it all into this calculator and it says 8mph(8 mph is ideal BTW
) ???http://www.diygokarts.com/speed-calculator.html
That cant be right, Im thinking ive missed something here because if this is about a 4:1 ratio and the old gearbox was 30:1 there would be a lot of difference but the difference is only a few mph (3 to be precise). Ive done something wrong here but for the life of me i cant see what, and i dont want to order stuff until i know its gona work
thanks
)
.
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