Jimmy22 wrote:... In one case i know, the guy runs a 2:1 gearbox and 90 degree drive , perhaps this will be the future or motor in the deck not in the Mast .
No way is that the future. Motor belongs in the water to take advantage of cooling. Also, no way is any gearbox the future...Use that weight, length and expense for more motor and get higher efficiency with less noise as benefits. Ultimately it will be inrunner motors designed and wound to a Kv specifically for the task. Possibly instead of one long thin motor there could be 2 in a line, since redundancy of motor and controller are good things to keep current lower and give you a way to get back under power in the event of a failure.
BTW, I haven't seen any 70kv motors without going to a diameter large enough to create unnecessary drag.
While I'm sure the foil designs are great for those with real skill, I think there's a far bigger market for something far more forgiving even at the expense of efficiency. eg have some foils that provide stable lift that is tunable and/or sized based on rider weight, and then a smaller set of foils similar current designs yet smaller, to make it still able to steer/carve using greater weight shift as input. Ideally a foil design that provides stable lift that is only speed dependent to eliminate the need to focus on CG forward/rear , while allowing left/right turning from weight shift input...ie something closer to a skateboard in terms of control.