First of all I’d like to thank everyone who contributes on here and especially those who take the time to document their progress on YouTube. This is a great resource and I wish I found it sooner. I have wasted so much money buying the wrong things and teaching myself about batteries, motors and carbon fibre.
So here’s where it’s at.
First of all my project differs from most as it’s a sit on top kayak and the motor is in the hull. I went this way because I had already bought the motor for another project and it was to big to put under the water.
Hull- carbon fibre, I’ll probably make another one at a later stage because I think it can be much lighter.
Motor- Turnigy rotomax 150cc 150kv outrunner
Gearbox- custom 90 degree, oil filled
Drive shaft- 12mm x 700mm currently 316 stainless but it hard to find a straight piece. I’m thinking titanium or chromoly tube may be better. For testing I supported it half way down the shaft but ideally I don’t want to.
Mast- custom carbon, I’m currently chipping the paint out of the mould because things didn’t quite work out.
Battery- I may have gone wrong here, I have a 48v 14s ebike battery. It cuts out at only 60amps and is intended to run at only 30.
Any ideas on the drive shaft? Is anyone else trying this?
How much thrust do I need? Currently I get 27kg before the battery cuts out at 60amp. The motor can take more and it wasn’t at full rpm.