Larry wrote:
> This is my first post to this forum. I have been following, with interest, the different threads.
> I own an ElectraCraft 14LS(Silent Runner). It has a 5HP GE motor that is being controlled by the stock ElectraCraft controller using 24VDC. The label on the motor says that it is a 36 VDC motor.
The motor on my boat will run at 72v, (I'm running 36v) but there would
be little point in me doing so with out re-gearing to get the prop speed
back into the proper range. All it would do is make me carry more battery.
> This would seem to indicate that I am using only 2/3 of the rated power. I would like to try adding another 6V battery to the string, but do not know if the ElectraCraft controller can handle 30 VDC. Does anyone know if the ElectraCraft controller can handle 30VDC?
>
I'm using less than 1/4 the rated power of my electric motor - but
since my hull reaches maximum speed with approx 2.5kw of power, putting
more in is a complete waste - the hull wont go any faster!. I'v got the
motor I've got as it had the best power/efficient/
time. Electric motors don't care if you run them under rated.
Do you have any reason to believe that spinning your prop faster will
give you any extra speed ?, and would the increase in drag at the
increased speed reduce the efficiency so much that range will be terrible ?
More is not necessarily better.
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