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[Colin Bishop]

Some advice welcome please!

I am currently builing a traditional Greek fishing boat (motorised).  I am fitting an old Monoperm motor with is ideal for the job. I also have a Mtronics Micro Viper 10 to use as the ESC.

The motor only needs 6v but the ESC is rated at 6-12v. Is it OK to use a 6v NiMH pack on the bais that there is a bit of 'wriggle room' in the stated ESC minimum voltage (in case of voltage drop) or should I play safe and go for a 7.2v pack and use the dual rate function on the TX to limit the throttle range?

Colin

Edit: I have decided to go with a 7.2 power supply as 6x 1.2v 2600MAh low self discharge batteries will fit nicely into the space available. The motor draws 0.42amps at 6v on the bench and 1.3 amps when the 30mm prop is submerged. (I shall probaly use a 25mm prop). This setup should be good for a couple of hours running time.

I would still be interested in any comments as to whether the ESC might not work if a 6v battery suffers a voltage drop after a run.

[captain_reg]

Hi Colin
I would assume the lower voltage limit is to give the voltage regulator in the BEC some headroom to work in supplying its 5v output. If you were to disconnect the red wire and use an external receiver battery then I assume you could use whatever voltage battery to drive the motor without issue, but that is just an assumption.
I'm sure I can recall having seen the RX voltage (reported back via the flysky transmitter) drop to 4.5v but that was caused by a greedy servo trying to draw too much current from the BEC.
Sound like you have come across a sensible solution with the 7.2v pack

RegardsRichard