hlombard
New Member
One Grubee website lists the ratio of the Grubee 2 Skyhawk gearbox as 4.2:1. Someone heer calculated it at 1.83:1 ???
I counted the teeth on my gearbox and calculate the ratio as 3.7:1
Please confirm my calculation:
Gear 1: 35 / 54 = ratio of 1.54
Gear 2: 20 / 48 = ratio of 2.40
Overall ratio = 1.54 x 2.40 = 3.70 ?
Then you have the reduction from the 11 tooth sprocket to 56 tooth sprocket on the wheel: 11 / 56 = 5.09
Thats an overall ratio for the setup of 18.85:1
Can you math-heads please check?
Thanks
I counted the teeth on my gearbox and calculate the ratio as 3.7:1
Please confirm my calculation:
Gear 1: 35 / 54 = ratio of 1.54
Gear 2: 20 / 48 = ratio of 2.40
Overall ratio = 1.54 x 2.40 = 3.70 ?
Then you have the reduction from the 11 tooth sprocket to 56 tooth sprocket on the wheel: 11 / 56 = 5.09
Thats an overall ratio for the setup of 18.85:1
Can you math-heads please check?
Thanks