08/10/2019
Steve
Looking (again) at an electric for my Ericson 35. (displ 12000#, beam 10ft, LWL 27ft, draft 5 ft).
So maybe a 10KW kit from Thunderstruck.
Anyone know if it is possible/practical couple the electric to the shaft aft of existing engine (an A4). I would run the electric for getting in and out of the harbor only, so don't need much of a battery bank. For longer hauls, would use the A4 (which is running fine - for now).
thanks
--Steve
08/10/2019
Tom
Hi Steve,
I believe it should be possible, but there would be a problem with the gear box. You would have to make sure your gearbox is in neutral. I also don't know how much power would be lost when you are turning your gears as well as the prop. It might be a good idea to install a clutch after the gearbox that would let you disconnect the motor and gears from the driveshaft.
08/10/2019
Steve
Thanks Tom,
With the ICE put in neutral, the shaft spins free. I will not run both motors running at the same time, so I'm thinking it would work without (another) clutch. But not sure how to mechanically couple the electric to the middle of the shaft, not the end (which is coupled to the ICE). Any ideas ?
--Steve
08/11/2019
Tom
SteveNo matter what you decide to do, you will need to disconnect the shaft from the motor. You will need to put a pulley or sprocket on the shaft to accept a belt or chain drive. As far as I know, that is the only way to add the electric motor and still maintain the connection to the ICE. Be sure the belt or chain are rated for the power you will be putting on the shaft.
If it is a problem to re-engineer your drive system you might wish to investigate getting an electric outboard and keep it completely separate from your ICE since you will be using mostly to get in and out the harbor. There are a number of these on the market today. The one I saw that might meet your needs is from Elco (48 volt - 185 amp) for about $5000. All you would need is the batteries and a motor mount for the back or side of the boat.
Tom
Steve
Looking (again) at an electric for my Ericson 35. (displ 12000#, beam 10ft, LWL 27ft, draft 5 ft).
So maybe a 10KW kit from Thunderstruck.
Anyone know if it is possible/practical couple the electric to the shaft aft of existing engine (an A4). I would run the electric for getting in and out of the harbor only, so don't need much of a battery bank. For longer hauls, would use the A4 (which is running fine - for now).
thanks
--Steve
08/10/2019
Tom
Hi Steve,
I believe it should be possible, but there would be a problem with the gear box. You would have to make sure your gearbox is in neutral. I also don't know how much power would be lost when you are turning your gears as well as the prop. It might be a good idea to install a clutch after the gearbox that would let you disconnect the motor and gears from the driveshaft.
08/10/2019
Steve
Thanks Tom,
With the ICE put in neutral, the shaft spins free. I will not run both motors running at the same time, so I'm thinking it would work without (another) clutch. But not sure how to mechanically couple the electric to the middle of the shaft, not the end (which is coupled to the ICE). Any ideas ?
--Steve
08/11/2019
Tom
SteveNo matter what you decide to do, you will need to disconnect the shaft from the motor. You will need to put a pulley or sprocket on the shaft to accept a belt or chain drive. As far as I know, that is the only way to add the electric motor and still maintain the connection to the ICE. Be sure the belt or chain are rated for the power you will be putting on the shaft.
If it is a problem to re-engineer your drive system you might wish to investigate getting an electric outboard and keep it completely separate from your ICE since you will be using mostly to get in and out the harbor. There are a number of these on the market today. The one I saw that might meet your needs is from Elco (48 volt - 185 amp) for about $5000. All you would need is the batteries and a motor mount for the back or side of the boat.
Tom