How to connect waterpump to 75200?

Build, Repair & Mod
#1

Hi,

I am on the finishing track of my inflatable efoil and wondering how to connect the waterpump to my 75200 ESC.

I think it should start and stop with the motor signal.

The ESC has many cables and I have no clue which to use.

My remote is a VX3 which I connected to uart2 (it seems to work out of the box).

Could you please help?

Many thanks
Best
Christof

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#2

If you remove the pump and use pressure from moving, you get less parts that can fail and also solve the problem to switch the pump on and off. As soon as you move, you get water flow. Many successful builds take the water from an inlet tube at the front of the motor pod.

#3

Thanks sat_be.

Interesting thought - like in my little race boats.

I will try first to set up a closed circuit of water or cooling liquid for my 12x12 system.

Best
Christof

#4

I will control the waterpump via a temperature sensor relay. Seems straightforward and simple. The switch costs 6 Euros.

Best
Christof

#5

Hi Chrizztof, waterpunp is really unnecessary weight & complexity:
The Flipsky ESCs works pretty well for approx 15min without any cooling in my setup (130kg AUW, 5kw 12s12p) before thermal throttling occurs.
With forced induction from the motorpod I never exceed 35°C - in our 120+ German/Austrian builders group everybody moved away from the waterpump setup. Save yourself the trouble, except if you expect to run 6kW+ sustained…

#6

Thanks Foliengriller. This makes me really refraining from the waterpump. I don’t like the idea of a water inlet where the ESC is. I will buy a temperature logger to check the heat in order not to destroy the electronics.
Best
Christof

#7

Guys, what is the minimum tubing diameter for ram pressure-driven cooling? Any info on curvature radius of the tubing in the mast clamp? Getting rid of the pump seems a good idea…

#8

I have 4mm and 6mm without any isue…