[PSUBS-MAILIST] motor pod testing

[Alan via Personal_Submersibles]

Hi Brian,
you should get a lot more cooling in the water. When testing my lights, they
heated to the point where you could only touch them for a few seconds
after 5 minutes but stayed warm for an hour in water.
You were testing with no load on the thruster. It will heat up quite a bit
quicker with a load on. 
Cheers Alan

Sent from my iPad

> On 3/04/2018, at 2:52 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi All ,         Tested my motor pods today for about an hour at about 3/4 maximum speed.   Had about 8 feet of 1/2" vinyl tubing coming from the top of the motors going straight up into the air and hanging from my overhead I beams.  Had the vinyl tubing connected to small inner tubes that had the air evacuated out of them.  It was a cool day ( overcast, 60 degrees) . I ran the motors for over an hour, by the end of the hour the wd40 had climbed the whole 8 feet of tubing to the base of the inner tube.  The motor pods were warm.  If the sub had been in the water I don't think I would have had as much expansion of the oil.  So I think that is going to work pretty good.   Gives me a chance to run the batteries down significantly to see how my battery charger works with drained batteries, and how long it takes to bring them back up.
>  
> Brian
>  
>  
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