Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[Dicky-P]

Could you please tell me if running a 7.2v motor on 8.4v batteries will cause damage to the motor

I have had my boat out once under these conditions and it got quite hot

Thank you

[barriew]

It will almost certainly shorten its life, but is unlikely to cause it to expire suddenly.

Barrie

[Martin (Admin)]

Just keep an eye (finger) on the how hot the motor gets.
As a rule, it's too hot if wet finger sizzles on it!

[scoop]

Could you please tell me if running a 7.2v motor on 8.4v batteries will cause damage to the motor

I have had my boat out once under these conditions and it got quite hot

Thank you

In the good old days I ran a Graupner 8.4v BB Turbo motor on 14.4v (2 x 7.2v Ni-Cads <remember those> in series) with a water cooling coil wrapped around the can, prop was an Octura around 45mm diameter, can't remember if it was a 4 or 6 series prop though.
It (the motor) never did get hot, mind you the batteries came in useful as hand warmers in brass monkey weather 
Your problem may be the loading on the motor, try a smaller diameter prop 

Cheers
Scoop