Propulsion

Early draft propulsion I decided or tried to decide on motors and power controllers (which are at EUR70+ pretty expensive!). Should I go for 12V? Slow running low amp motor and big propeller or fast running motor, either with small propeller, or gear and large propeller? The fast running motors allways use more amps.

Then: which power controller is the best? I get the impression, too, that the controllers recommended for the power rudders are oversized (and thus too expensive). How to clarify that? Do I actually need proportional power controllers for the rudders? And: does the servo controller card work with power controllers? I would think so (same plugs), but if not I'm screwed. On the other hand, they just get plugged into the receiver like a servo, so...