Hi!
I'm new on this forum although I've been browsing the watercraft section for a while.
I am an avid fisherman and I usually use my trolling motor on a 4.4m deep V boat. It weights about 400kg.
The trolling motor is a 12VDC, 55lbs (245N) thrust installed at the bow. At 12.8V, the motors runs at 1540 RPM.
I want to optimize the design for efficiency at low speed (1m/s) and low noise.
Ideally I would like to keep the maximum shaft power under 600W.
I forgot to do readings over the last weekend, so I'll be doing them this Saturday.
Since I do not want to modify the internals of my trolling motor, I decided to add a Kort 19A nozzle and redesign my propeller.
My stock propeller does not have a spinner so that was one of my first additions. I also wanted to quickly replace blades so I created a modular hub. I can parametricly change the number of blades.
For the blade design, I started fiddling with JavaProp where I optimized off the available power, insuring that the prop would not go beyond 600W. I have access to a well calibrated 3D printer so I can print everything quite easily. Actually I already tested a propeller but it wasn't properly balanced.
I've red that Kaplan propellers would be adequate for my application (Ka-4-70?). Can anyone tell me where I can find the foils to use for the blade profile?
I've included figures of my current design.
Thanks for your help!
I'm new on this forum although I've been browsing the watercraft section for a while.
I am an avid fisherman and I usually use my trolling motor on a 4.4m deep V boat. It weights about 400kg.
The trolling motor is a 12VDC, 55lbs (245N) thrust installed at the bow. At 12.8V, the motors runs at 1540 RPM.
I want to optimize the design for efficiency at low speed (1m/s) and low noise.
Ideally I would like to keep the maximum shaft power under 600W.
I forgot to do readings over the last weekend, so I'll be doing them this Saturday.
Since I do not want to modify the internals of my trolling motor, I decided to add a Kort 19A nozzle and redesign my propeller.
My stock propeller does not have a spinner so that was one of my first additions. I also wanted to quickly replace blades so I created a modular hub. I can parametricly change the number of blades.
For the blade design, I started fiddling with JavaProp where I optimized off the available power, insuring that the prop would not go beyond 600W. I have access to a well calibrated 3D printer so I can print everything quite easily. Actually I already tested a propeller but it wasn't properly balanced.
I've red that Kaplan propellers would be adequate for my application (Ka-4-70?). Can anyone tell me where I can find the foils to use for the blade profile?
I've included figures of my current design.
Thanks for your help!