Ok, so I have more or less decided to go for the Leaf drive train as it is the only drive train that is proven to work as is outside the car as far as I know, and I do not know how to hack any systems.
https://www.diyelectriccar.com/forums/showthread.php/re-using-complete-leaf-drive-system-151458.html
The Tesla drive trains are of course very appealing with their large battery packs and tons of power, but they do cost a whole lot more, which makes them out of reach for me.
The Leaf can apparently provide full power for about 30 seconds, and then scales back to ~55 horsepower according to an unconfirmed source. I guess that could be acceptable for a smaller boat.
The sustained load will probably be higher than in the car, so maybe it would be a good idea/nessesary to dismantle the battery pack and water cool the cells?
Which brings me to my next point. Electricity and water... I assume the Leaf drive train has a decent amount of water proofing since most cars are exposed to water from underneath? The low voltage components are probably a bigger risk since they usually are more inside the car...
I've also decided to mount the motor straight to the drive, instaid of using the Leaf transmission. This will give me an rpm range more similar to that of a boat engine than if I use the transmission. Custom building a transmission feels like over complicating things...
The two main problems that I've predicted so far is:
1. How to physically mount the motor and all other components in a good way.
2. How to make it have a true boat feeling - replacing the gas and brake pedals with a boat throttle lever and maintaining gear shift functionality.
Apparently it's possible to shift the car from D to R and back whilst the car is creeping without pressing the brake pedal, making a throttle lever conversion a little closer to possible. "All that is needed" is to have two gas pedal sensors, one for forward and one for reverse, as well as shifter sensors to tell the system when to shift from drive to neutral, and from neutral to reverse. In D and R, the boat will of course creep forward as the car does, but a regular boat does that when in gear anyway so that is just a good thing.
Maybe all this will be possible with a little bit of imagination and some motivation and tools...
https://www.diyelectriccar.com/forums/showthread.php/re-using-complete-leaf-drive-system-151458.html
The Tesla drive trains are of course very appealing with their large battery packs and tons of power, but they do cost a whole lot more, which makes them out of reach for me.
The Leaf can apparently provide full power for about 30 seconds, and then scales back to ~55 horsepower according to an unconfirmed source. I guess that could be acceptable for a smaller boat.
The sustained load will probably be higher than in the car, so maybe it would be a good idea/nessesary to dismantle the battery pack and water cool the cells?
Which brings me to my next point. Electricity and water... I assume the Leaf drive train has a decent amount of water proofing since most cars are exposed to water from underneath? The low voltage components are probably a bigger risk since they usually are more inside the car...
I've also decided to mount the motor straight to the drive, instaid of using the Leaf transmission. This will give me an rpm range more similar to that of a boat engine than if I use the transmission. Custom building a transmission feels like over complicating things...
The two main problems that I've predicted so far is:
1. How to physically mount the motor and all other components in a good way.
2. How to make it have a true boat feeling - replacing the gas and brake pedals with a boat throttle lever and maintaining gear shift functionality.
Apparently it's possible to shift the car from D to R and back whilst the car is creeping without pressing the brake pedal, making a throttle lever conversion a little closer to possible. "All that is needed" is to have two gas pedal sensors, one for forward and one for reverse, as well as shifter sensors to tell the system when to shift from drive to neutral, and from neutral to reverse. In D and R, the boat will of course creep forward as the car does, but a regular boat does that when in gear anyway so that is just a good thing.
Maybe all this will be possible with a little bit of imagination and some motivation and tools...