Model Boat Mayhem

Mess Deck: General Section => Tugs and Towing => Topic started by: Mach1 on September 08, 2021, 03:55:46 pm

Title: Brushless outrunners in tug
Post by: Mach1 on September 08, 2021, 03:55:46 pm
I have two ROXY C42-50-06 800kv that were intended to go into a 1/12th scale lifeboat but this may now not happen.
Would it be possible or difficult to install these into a single screw large tug by somehow coupling them together with a gearbox that would limit the speed of the motors ? They description of these motors says they are high torque.
Title: Re: Brushless outrunners in tug
Post by: mogurnda on September 08, 2021, 04:34:53 pm
It would be much easier to fit a single large brushed electric  motor than to run 2 outrunner brushless motors through a gearbox.   

David
Title: Re: Brushless outrunners in tug
Post by: Mach1 on September 08, 2021, 04:44:23 pm
Yes thatís exactly what I thought. I will forget the idea.  Many thanks for your reply.
Title: Re: Brushless outrunners in tug
Post by: JimG on September 08, 2021, 05:24:36 pm
Probably no need to go to a big brushed motor, just use one of the brushless. With a kV rating of 800 it should turn a good sized prop. Need to limit the speed of the motor then either use a transmitter which allows you to change the end point of the throttle stick or just reduce the voltage of the battery, a 6V  will give you off load revs of 2400 and 12V 4800 revs off load.
Jim
Title: Re: Brushless outrunners in tug
Post by: Taranis on September 08, 2021, 06:18:09 pm
Surely you meant 800rpm per volt Jim? 6x800 = 4800 etc


I agree one motor is plenty for a tug and I would use a Hobbywing Quicrun car ESC as they are so appropriate in my experience.
Title: Re: Brushless outrunners in tug
Post by: Mach1 on September 08, 2021, 06:59:47 pm
Thank you very much for the advice it is much appreciated.