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Author Topic: Motor Cooling  (Read 1142 times)

tassie48

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Motor Cooling
« on: November 10, 2023, 10:40:19 pm »

Hi Crew my new build is yet another 1/12 Scale tid tug running a 142mm four blade propeller a tad oversize but I have one from Simon in my build box with a  8mm shaft my motor is  12 Volt 2750 rpm motor I am looking at cooling it via a pump and cooling coil copper around the motor can along with the normally computer cooling fans looking at a inline pump 12 volt caravan type  11 lpm flow rate ,is any one else running big motors with cooling coils tassie48
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derekwarner

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Re: Motor Cooling
« Reply #1 on: November 11, 2023, 08:35:32 am »

Hi tassie48 ......


12 volt x 2750 RPM reminds me of a very substantial motor, however what is the current draw with some resistance over the output 8mm shaft?
Is the motor a Smiths 12 volt motor vehicle air conditioning dash blower fan type?
Do you have a digital lazer pyrometer [shoot the spot & read}?


So unless a temperature rise [motor shell] is unacceptable, is it really necessary to add the complexity of water motor cooling?


Remembrance Day for us both


Derek
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Derek Warner

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Illawarra Live Steamers Co-op
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www.ils.org.au

nemesis

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Re: Motor Cooling
« Reply #2 on: November 11, 2023, 12:10:12 pm »

One method I used was to fix a fan onto the coupling so that it blew air over the motor, worked very well. nemesis
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nemesis

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Re: Motor Cooling
« Reply #3 on: November 11, 2023, 12:29:23 pm »

That is a big prop for that boat, could you not gear it down, say 2 to 1, that would reduce the amps somewhat, nemesis
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tassie48

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Re: Motor Cooling
« Reply #4 on: November 11, 2023, 05:50:09 pm »

Derek we ran the Red duster up the port side halyard the White ensign up the stb side the Blue national flag from the flagstaff with my neighbors flying the Australian flag at Jamie's place and Bruce flying the Union Jack down the road becoming a tradition both Remembrance Day and ANZAC day all ex sea farers in one street , back to the Tid Tug I like to run cooling water over the side as a feature of the model and use the water as cooling coil around the can just to aid the cooling not that I think it will get to a point of overheating rather a useful detail , i run computer cooling fans over the motor and the ESC just because it makes sense in my mind being an enclosed environment with heat etc just one of those things i do I suppose,  one feature is when the head door opens via servo the crew member sitting on the head the pump via switches discharges water out the stb side light turns on as well , nemesis I will look into gearing it down did think about it was going to do some testing when installing the motor tons of room in the hull many thanks for your input crew regards tassie48
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