johnny25 you got a copy. over.............

[shawnfish]

im pretty sure it was you who showed me the formula to see how many revolutions it takes to turn my prop once....

or take this 12:21 and dummy it up for me? thanks in advance....to whoever can help.

 

[Johny25]

sure, just divide the 21 by 12 and you get 1.75.......so you have a 1.75:1 gear ratio. Motor turns 1.75 times to your 1 propeller revolution