T-Pain Is On A Boat: Re: [Electric Boats] motor overheating

Thursday, June 18, 2009

Re: [Electric Boats] motor overheating

Denny, I don't know the Dia and pitch of the prop. I do know the prop is 2 blade and was mated to a Renault 8 HP diesel,My guess is the dia of 8"-10". The motor is a Mars, 48v I have measured the current. To move the boat at 5kts requires 90a/h,at 20a/h the max speed is 2.7kts. I cannot measure the shaft RPM. I have not measured the motor temp, it goes into the reduced power mode after about 15 min of motoring @ 90a/h. The conroller is not getting hot.
Thanks,Bob--- In electricboats@yahoogroups.com, "dennis wolfe" <dwolfe@...> wrote:
>
> Bob,
>
> More data would help us help you.
>
> Prop Dia? Pitch? Speed reduction? What motor? Voltage? How hot is the motor? How long does it take to get hot? How hot is the Controller?
>
> Can you measure motor or shaft rpm?
>
> Do you have a ammeter to measure motor current? Current creates the heat.
>
> Alex at Thunderstruck is a good resource.
>
> Denny
>
> ----- Original Message -----
> From: rbrt.beebe
> To: electricboats@yahoogroups.com
> Sent: Thursday, June 18, 2009 9:13 AM
> Subject: [Electric Boats] motor overheating
>
>
>
>
>
> I installed the Thunderstruck sailboat kit in my Hunter 27.
> I'm having problems with the motor overheating.
> I've adjusted the packing gland so as to have the proper drip for cooling and the prop shaft is turning freely.
> I would appreciate any other considerations/advice to resolve this condition.
> Thanks,Bob
>
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> [Non-text portions of this message have been removed]
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