While a jet is a bit simpler in terms of construction, it has a much lower efficiency when compared to a prop.bbq870 wrote:what about a jet engine?
high RPM and no need for gear reduction. I think that every additional part eats up efficiency.
would a jet be better? (longer runtime?)
This motor is about 300W and probably brushed, which makes it impossible to push far out of its design performance limits. I cooked seadoo torpedo brushed motor in 1 min, just doubling the output.Isham.padron wrote:Can a trolling motor be converted to operate like an efoil?
What kind of thrust is needed to get you riding and what are the thrust specs on the efoil?
Here is a trolling motor that I found on Amazon. https://www.amazon.com/dp/B00VYP3R82?psc=1
Hi anbat8, quite simply there isn't a motor on hobbyking that will allow you to avoid a gearbox. That spirit motor appears to be around a 50KV motor (allowing for inefficiencies). Its completely custom built for epropulsion. You'd have to custom wind a motor to try and achieve something similar or alternatively buy the lower pod from the spirit motor and hope it works.anbat8 wrote: According to you guys, which electric motor on hobbyking will give the same spec than the epropulsion spirit 1.0 in order to avoid the gearbox (speed reducer) in a construction of a efoil motor?
Maybe not with the right impeller design. Implanted heart pumps can run up to 15k rpm without cavitation. Instead of a more conventional propeller-like arrangement, it looks more like a screw with a housing around it.dirty_d wrote:I've been toying with the idea of making one of these. I've ordered a kit from http://www.clearwaterfoils.com/ already. I'm going to just use it as a wake foil behind a boat for now. The thing that's holding me back from making an electric one is the gearbox. Even the one that pacificmeister used doesn't look like it was made to handle the power of that motor. I don't think it will last long. I was thinking maybe go direct drive with a small impeller and jet pump, but I think at 20,000rpm or so there would be really bad cavitation.
No, did you tried one of these? Is it reliable?nanni wrote:Hi anbat8, have you seen this? http://alienpowersystem.com/shop/brushl ... 0kv-3200w/
or this? http://alienpowersystem.com/shop/brushl ... 0kv-6000w/