Cliff. Ditto Ray. If they actually needed watercooling, you have the wrong setup.

i would run the thing first before fiddling around with water cooling.. I have a 96 inch destroyer on two hectoperm motors (about 50 watts each I think) and they don’t even get warm on 45mm props

Ashley

Hi Richard,

It's a question on another thread where Cliff has said he's using 775's for which your mentioned size of motor would be fine

We did never hear from Cliff what type of carrier he's building.

Regards Ray

Cliff – If your motors need water cooling, I can think of two ways of achieving that :

1. A pair of water scoops under the hull – these would be filled by the forward motion of the boat, a pipework coil around the motor(s) and exit out at the stern.

2. A separate pump, with similar pipework, driven by the ESC /main drive battery (or, perhaps, a dedicated pump battery).

I think I would try 1. first for simplicity. If the motors are getting too hot to touch after a good run, then I would consider the second option.

If you can rig up some sort of bench test for this, it could save a lot of work later on.

Good luck,

Dave

Hi Cliff,

I've had a look at your album of photos and the hull and installation is in place, it may help others to have a look to see how far you have progressed, it sounds like you are trying to achieve a cosmetic looking rooster tail out the back which would be interesting !! (Looks good on a jet ski)

But to answer your question the water pump will need a power source ie a battery and a switch maybe operated by a servo which would be simple or a seperate speed controller which you could plug directly into your receiver.

The plan your using as a basis looks like one of Glynn Guest's flat bottomed designs so you will need plenty of ballast low down to keep it up the right way with a flight deck 17" wide.

Regards Ray