L
lohring
Guest
I was actually complementing Aquacraft for building better equipment than they advertised. I am always impressed at the spike currents you get as the prop changes immersion. The UL-1 ESC is a good unit as well, it just has a higher internal resistance than some others. Our former UL-1 class, now the 1/12 scale class, mandates that both the motor and speed control be from either the Proboat or UL-1. Something like that is probably the best option if you are serious about controlling costs. A real electronic fuse or sealed data logger can also be used.
Current draw is everything in electrics. Heating is what destroys things and it's proportional to the current squared times the resistance. In the short run, overheating motors doesn't cause an immediate problem. Over time the insulation breaks down and the motor fails. That's why it's hard to decide what you can get away with. We slowly worked up to the present setups over several seasons. If you start there, you probably will melt things since the current draw is determined by hull resistance as well as propeller efficiency. The P spec hydros started as 55 + mph boats. They are now 65+ mph boats. The UL-1 has been run over 60 mph.
It's racing and no one should expect things to run forever. Electric motors can be hugely overloaded compared to internal combustion motors. The 48 volt hydraulic pump motor in our
was run at 140 volts and 900 amps. In a lift truck it will run for years. We were happy it ran at that power for minutes.
Lohring Miller
Current draw is everything in electrics. Heating is what destroys things and it's proportional to the current squared times the resistance. In the short run, overheating motors doesn't cause an immediate problem. Over time the insulation breaks down and the motor fails. That's why it's hard to decide what you can get away with. We slowly worked up to the present setups over several seasons. If you start there, you probably will melt things since the current draw is determined by hull resistance as well as propeller efficiency. The P spec hydros started as 55 + mph boats. They are now 65+ mph boats. The UL-1 has been run over 60 mph.
It's racing and no one should expect things to run forever. Electric motors can be hugely overloaded compared to internal combustion motors. The 48 volt hydraulic pump motor in our
was run at 140 volts and 900 amps. In a lift truck it will run for years. We were happy it ran at that power for minutes.
Lohring Miller
