Spirit System

I have a 700 size Sea hawk from Roban models , does anyone know the gear ratio for that ? Thanks

Hello,

gear ratio can be calculated easily by equation:
Main gear tooths / Motor pinion tooths = Gear Ratio

So it is only needed to know these two things, then you can calculate it.

Hi Tomas ! I knew that part , but since the model has 2 stages gears that why I was lost , may be someone has the same model could give me a short cut . Thanks

two stage is no brainer.... count the teeth on both gears at each stage... get the gear ratio for the first stage and multiply it with the gear ratio on the second stage... This will give you the overall gear ratio..

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