Originally Posted by Munter
You are taking a lot on trying to make a hybrid drive train as well as integrating differential steering into this craft. I can't comment on the specific design parameters you have sought advice on but I can suggest that adding multiple layers of innovation can create incredible unnecessary complexity and multiple potential points of failure for the concept. I would include a rudder.
I do not think my project has much innovation. Motors, Batteries and Controller are well proven and simple adaptations. Controlling the Thrust-mixing for steering is also pretty simple - Just some initial calibration needed.
I'm more concerned about the "boating" stuff, since i have do admit my knowledge on hull design is next to nothing.
Getting the Prop position and angle right. Angle will most likely be fixed so do i need a way to trim the boat(plates). Setting the center of gravity and so on....
Originally Posted by Mr Efficiency
Why the twin props ? You just dropped a lot of mileage right there.
My idea was to loose some fabrication work, since making two identical propshafts vs shaft+rudder seemed like the easier way.
Also i thought by elimination rudder drag and maybe using energy recovery on the trailing motor it could be more efficient.
To energy recovery in general:
I could go for max maneuverability by allowing the motors to run in reverse during steering or use Braking(Energy Recovery) on one Motor boosting overall power to the remaining motor. But there probably no way to know the better route before trails and that's an easy Software change anyway.
Originally Posted by Irie
What motor and battery pack are you considering?
I've seen your thread, great information there.
Motor: the NeuMotors 8038 15KW cont. 30KW peak is my current pic(but some Paramotor-Motors also look very promising)
Battery: Custom 18650 Pack around 14S14P - 2,4KWh total storage
Battery Pack will be the limiting factor at 20-25KW and will be empty after 6 minutes at full load. Using the generator to recharge takes about 75minutes.
Or i can go 4KW für 60min an then have tor slow to 2KW.
I do realize the limited range is a huge drawback for most, but it fits my use case(lake) pretty good.
"sprint and drift" like a good old russian sub*G*