I'll see if I can shed some more light on this 'generator' problem.
In posts # 29 & 30, sundog & Disar got it spot on.
When you release the throttle at 30,000revs & say 60mph, the motors own inertia & the water flowing over the prop keep the revs up higher & for longer. Yes the motor is slowing down from the moment you release the trigger but it takes a lot longer than it does for a dry run on the bench. But the highest voltage is generated in the first instant that you chop the throttle.
It must be remembered that this really becomes a problem with ESC's that have a BRAKE mode, as many of the car & aircraft ESC's that a lot of us use, do. If the 'BRAKE' is programmed to the ON mode, a lot of ESC's apply an amount of brake automatically, without you actually pushing the trigger into the brake zone on the Tx.
This is where the problem arises. Especially if the battery voltage is already at the max (or close to) limits of the ESC.
If you didn't read the PDF I posted earlier in this thread here it is again. It's interesting reading.
Cheers.
Paul.
In posts # 29 & 30, sundog & Disar got it spot on.
When you release the throttle at 30,000revs & say 60mph, the motors own inertia & the water flowing over the prop keep the revs up higher & for longer. Yes the motor is slowing down from the moment you release the trigger but it takes a lot longer than it does for a dry run on the bench. But the highest voltage is generated in the first instant that you chop the throttle.
It must be remembered that this really becomes a problem with ESC's that have a BRAKE mode, as many of the car & aircraft ESC's that a lot of us use, do. If the 'BRAKE' is programmed to the ON mode, a lot of ESC's apply an amount of brake automatically, without you actually pushing the trigger into the brake zone on the Tx.
This is where the problem arises. Especially if the battery voltage is already at the max (or close to) limits of the ESC.
If you didn't read the PDF I posted earlier in this thread here it is again. It's interesting reading.
Cheers.
Paul.
Comment