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Author Topic: Torpedo 500 motor / battery info  (Read 1619 times)

al2612

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Torpedo 500 motor / battery info
« on: October 16, 2017, 09:08:50 pm »

First attempt at a full scratch build, a 32" Downeast / Lobster boat style hull in ply, to be built to my own design as a picnic / fun boat. Have  acquired an MFA Torpedo 500 and a 40mm 4 blade Raboesch prop, 175 series I think. Hoping to run direct drive. Any advice on battery size  voltage and Mah to get a turn of speed if required and a reasonable run time. Lipo preferably as I have a 2/3 cell charger from a previous project.  TX
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dougal99

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Re: Torpedo 500 motor / battery info
« Reply #1 on: October 16, 2017, 09:18:27 pm »

I use a 12v 7Ah SLA in my Sea Queen, which planes quite nicely. These motors can call for <13 Amps, so for a decent run you will need a big capacity battery.
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al2612

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Re: Torpedo 500 motor / battery info
« Reply #2 on: October 16, 2017, 09:53:48 pm »

TX for your input Dougal. Dont really have enough room for a big  SLA as the rear of hull has no depth.  Had been considering 2 x 11.1v lipos in parallel  to get between 4000 / 6000 mah. which could fit each side of hull in forward third of hull. PDF attached of drawings used in basic hull construction to see restrictions
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al2612

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Re: Torpedo 500 motor / battery info
« Reply #3 on: October 16, 2017, 10:01:58 pm »

Looks like i did not send previous post correct - should read - dont really have room for big SLA  was considering 2x 11.1v lipos in parallel to get more Mah fitted each side of hull in forward part of hull - please see pdf for restrictions
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Stan

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Re: Torpedo 500 motor / battery info
« Reply #4 on: October 16, 2017, 10:18:08 pm »

HI Please see my p/m sent to you.

Stan.
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