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[Rodeo]

Is there a basic formula to work this out ,or mount equal front to back distance,then ballast to suit rest of gear radio etc? Not at test floating stage yet,but need to get bulkhead in.

[Umi_Ryuzuki]

I typically mount motors so that they can connect to the propeller shafts.
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[Stan]

Hi rodeo the length of the prop shaft normally determines the position of the motor. Do not get too stressed about positioning of items in the hull final ballast will sort out any problems. See third P/M sent.




Stan

[malcolmfrary]

Compared to the battery, the motor is usually a bit player as regards weight and weight distribution.  The battery decides where the centre of gravity is going to be, the motor goes where it fits - as Umi_Ryuzuki says, on the end of the prop shaft.  Select the prop shaft length to put the motor where it needs to go.  Of course, there is a choice of in-line couplers to allow for.  Alternatively, a gear or pulley system can have the motor close to the shaft end, or even "folded back" on the shaft.  Choices, choices.