water cooled speed controler

[Brian MorrisParticipant @brianmorris30448]

building the shamrock (model slipway ) i have a watercooled speed controller , does it need a pump and also where do i put the water scoop? thanks

[Brian MorrisParticipant @brianmorris30448]

[Paul TParticipant @pault84577]

Hi Brian

 

What make of speed controller is it?

 

Paul

[Brian MorrisParticipant @brianmorris30448]

ripmax sea sprint p-xtra

[Mike DavidsonParticipant @mikedavidson22772]

Hi Brian most ESC’s today are claimed to be waterproof, but if cooling is required, a fair flow of water through the heat exchanger will be required, therefore, I would put a scoop down through the hull, and an exhaust on the transom so that a through flow is not impeded in any way. some correspondents claim that their ESC’s run hot, and that will not help. I guess that to be kind, you don’t make the ESC do too much work by fitting too high voltage battery, and remember the maker fitted it with water cooling for a reason, so my thoughts are that if you do cool it, it will notsustain heat damage and reward you with many years faithful service……………………………………………Mike Davidson…………..

[Paul TParticipant @pault84577]

Hi Brian

 

ESCs do run hot and as yours is water cooled I would think that it will need a constant flow of water so I would imagine that a pump will be required however I suggest that you check with ripmax.

 

Paul

[Dave MilbournParticipant @davemilbourn48782]

I’ve just seen the Tech Spec of this thing and you would probably need a 10-turn motor running from 16 cells to make it even break sweat. 280A continuous current? Who are they kidding? Even on 12v that’s more power than my workshop fan-heater uses at full blast!

I have more than a slight acquaintance with Shamrock and you won’t need anything more powerful than a Speed 600 ECO on 6 cells. Trust me. I wouldn’t worry about water-cooling the ESC, mate.

Dave M

Edited By Dave Milbourn on 24/03/2009 23:35:33

[ashley needhamParticipant @ashleyneedham69188]

Brian, I think that unless yours is a go-fast, then a scoop arrangment will not provide a good continuous water flow and so a pump is the safe bet. Shame you couldnt cut a small hatch in the bottom of the hull and glue the ESC into it and then you would have permanent water cooling !   or is that an idea too far????    Ashley

[Brian MorrisParticipant @brianmorris30448]

thanks for all your sugestions , i have a windscreen washer pump spare so i may as well fit it , it may also look perhaps more realistic!!

[60wattParticipant @60watt]

Brian,while your esc would need watercooling with a 700bb turbo on 12 cells it wouldn’t  in most racing classes.Your esc will cut out if it overheats,which I doubt will happen.

 

Watercooling was needed when fast electric boats used small high frequency at 40+ amps or where linear bec was used with 20 cells..The resultant losses in a small package required forced cooling.

 

You put a bent scoop inlet close to the prop or one  the underside of the hull or sponson and that pressure differential does the pumping for you. Googling for other fast-electric foruum posts and pictures will show you how it is done.

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