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Old Mar 29, 2008, 04:36 PM
Registered User
USA, IN, Carmel
Joined Feb 2006
349 Posts
Proportional Scale Cooling Pump.

By request on this forum, this attachment shows how I use a simple electric fuel pump (glo-engine refueling pump) to simulate cooling water discharge from an operating boat. It easily simulates the flow of heat exchanger cooling water from the boat when running ahead or astern, proportional to engine speed. When the model boat is dead in the water, a small battery pack incorporated into the circuit keeps the flow of water going at a reduced rate just as an idling boat would continue to flow cooling water with its engine running but transmission at neutral. It's on my blog as well.

The components needed are small enough to mount on or near the pump selected for use. The largest component is the AA battery pack. Way cool (pun intended.)

Fair winds and following seas...
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Last edited by Swift16; Mar 29, 2008 at 05:04 PM.
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Old Mar 29, 2008, 05:01 PM
Grumpa Tom
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United States, CA, Los Angeles
Joined Sep 2003
24,266 Posts

That is sweet, thanks John!
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Old Mar 29, 2008, 05:54 PM
Yacht Captain
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Canada, BC, North Vancouver
Joined Oct 2007
341 Posts
Nice one,
thanks John
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Old Mar 29, 2008, 08:56 PM
Boats on the brain!!
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Arnold, Mo.
Joined Jul 2005
4,651 Posts

More toys.
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Old Mar 30, 2008, 01:25 PM
RELAX. You'll live longer
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Brisbane- Australia
Joined Jul 2007
3,414 Posts
Thanks for that John. Even I can manage that. Great stuff.
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