[PSUBS-MAILIST] T-Rex Thrusters & Cooling

[Jon Wallace]

Never inquired about it with George.  My guess is it had as much to do 
with the overall design as anything else.  He used dog-ears at the open 
end to hold the motor which required a certain amount of material to 
support the 1/4 inch attachment bolts.  I suspect the can size was based 
upon convenience.


On 10/9/2013 8:48 PM, Joe Perkel wrote:
> I am trying to understand George's design intent reference his 1 ATM 
> SCH40 pipe housings and cooling.
> Where #8 SCH40 O.D. being 8.625" and your typical 2-3 HP DC enclosed 
> fan cooled motor being roughly 6", was it his intent to have this 
> airspace between the motor and inner wall for air circulation, or is 
> this space simply incidental?
> I am wondering if these housings can be slimmed down to a more snug or 
> custom fit with a reliance on conduction for cooling? Perhaps even 
> filling the 1 ATM housing with non-compensated oil for the sole 
> purpose of efficient conduction?
> I am also noting that the bow thruster industry likes to get the motor 
> out of the props way with a 90 degree drive arrangement. This has 
> interesting implications for potentially more efficient and downsized 
> lateral thrusters.
> Some musings.
> Joe
>

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