Hello there everyone. Please bear with me. There is so much information here and its wonderful! I know that majority of this forum is for foils. But, I’d like to try my hand at a diy build for my kayak. I have been reading many post/topics on this forum and figured I’d start throwing out my ideas.
Current vessel of choice is a 2021 Old Town Sportsman PDL 120. Not the most agile kayak, but very stable. At the moment I am using a Bixpy J-2 to move the kayak. It works ok but I want more thrust. Max speeds that I get are just about 3.8 MPH on its own. About 4.5 MPH with me pedaling. Pros are that it is a paired motor and battery set. Cons are it is a proprietary motor and battery. It retails for about $1,300.
Spec sheets don’t say much about the motor. I assume it runs at 25.2V and 17.8 Amps? Based on the 450 Watts of the motor spec and 25.2 V of the battery.
The next step up would be a Newport Vessels NK180. It is just the motor alone and retails for about $1,000. Good thing is that you can pair it with a 24 V battery with as much Amp Hours as you can afford. In a way that’s also a con and increases the overall cost. So that paired with a battery can range from $1,500 to $2,000. It definitely propels the kayak faster than the previous Bixpy J-2. I know because my brother has it and I borrowed it once. I got an average of 1-2 MPH higher top speed.
Now for the barrage of questions. Is it worthwhile to even attempt a diy? I’ve looked around and still find myself lost in all of the information. I saw the Flipsky 65111 and figured it could work? I don’t have much experience getting this involved with ESC and motors. Could I run a compatible ESC without watercooling? I’d like to get closer to 8 MPH, essentially doubling my current top speed. The motor itself would be used sparingly to putt around 10-15 minutes on the water. And then 1-2 long stretches like say up to an hour to get across the lake. Would that be bad for the motor? Making it work too hard for too long? And last but not least I’d like the overall cost to be about the same as well, if not cheaper.
Just want to say thank you if you’ve read through all of this. I figured I’d try to present as much research and background info as much as I can.