Lou
having the charge figure it does look like it was pulling 30 amps which is a very good level for this motor on 24 cells. It is the current at maximum effciency - but from the motor sound and boat speed it isnt there yet. BTW output from cell tests and rated efficiency at hose amps loads is approx 620 watts.
I, would not go to 30 cells yet. Even at the amp draw you have now your draw will rise to approx 69 amps, give or take 1 or 2 amps.
IMO your priority of COG is correct. The hull is running very wet. The speed is down from where it should be if the motor was winding out on 24 cells.
Ie right now 30 amps (the current at the max efficeincy point ) is being drawn at well below the max eff rpm. If you can loosen the hull up you should be able to run faster without additional current draw.
Try the other props but the current prop might do you for a while given the current draw. Once you get it down a bit then start loading it up with extra cells, 2 at a time. Then recharge at the pond if possible to see how u are going with current draw.
BTW how are you cutting the prop - all the toungue off, the tips rounded the back edge tapered to a point like a wing instead of a wedge and the prop back cut from the hub to give more of a scimitar shape? The scimitar shapes are very efficient. But dont loose the cupping on the prop that is important
having the charge figure it does look like it was pulling 30 amps which is a very good level for this motor on 24 cells. It is the current at maximum effciency - but from the motor sound and boat speed it isnt there yet. BTW output from cell tests and rated efficiency at hose amps loads is approx 620 watts.
I, would not go to 30 cells yet. Even at the amp draw you have now your draw will rise to approx 69 amps, give or take 1 or 2 amps.
IMO your priority of COG is correct. The hull is running very wet. The speed is down from where it should be if the motor was winding out on 24 cells.
Ie right now 30 amps (the current at the max efficeincy point ) is being drawn at well below the max eff rpm. If you can loosen the hull up you should be able to run faster without additional current draw.
Try the other props but the current prop might do you for a while given the current draw. Once you get it down a bit then start loading it up with extra cells, 2 at a time. Then recharge at the pond if possible to see how u are going with current draw.
BTW how are you cutting the prop - all the toungue off, the tips rounded the back edge tapered to a point like a wing instead of a wedge and the prop back cut from the hub to give more of a scimitar shape? The scimitar shapes are very efficient. But dont loose the cupping on the prop that is important