Model Boat Mayhem

Technical, Techniques, Hints, and Tips => DC Motors (Brushed) and Speed Controllers => Topic started by: Ben Tickle on September 12, 2011, 09:11:26 am

Title: Advice- 2x Graupner Spedd 900BB motors
Post by: Ben Tickle on September 12, 2011, 09:11:26 am

Hi All,
I have a friend who has got a boat with 2x Graupner 900BB motors. The boat has 2 propellers which are both approximately 50mm. Could anyone please suggest an ideal esc?

Thanks

Ben

Title: Re: Advice- 2x Graupner Spedd 900BB motors
Post by: MikeA on September 12, 2011, 09:46:51 am

a 30 amp esc for each motor will do it what voltage is he running though?

Title: Re: Advice- 2x Graupner Spedd 900BB motors
Post by: Ben Tickle on September 13, 2011, 10:16:21 am

Hi,

He is running the boat on 12v

Thanks

Ben %%

Title: Re: Advice- 2x Graupner Spedd 900BB motors
Post by: MikeA on September 13, 2011, 11:00:15 am

this will do it. well 2 of these anyway:

http://www.mtroniks.net/details1.asp/ProductID/726/sid/2/tioMarine30.htm

Title: Re: Advice- 2x Graupner Spedd 900BB motors
Post by: Ben Tickle on September 13, 2011, 06:50:33 pm

Hi Mate,

Do you have a wiring diagram to shoe how the motors would need to be wired up?

Thanks

Ben

Title: Re: Advice- 2x Graupner Spedd 900BB motors
Post by: MikeA on September 13, 2011, 07:35:00 pm

heres one. you will need to isolate the BEC from one of the esc's. this shows a brushless set up but the principle is the same, ibrushed has 2 wires to the motors instead of 3.

(http://s4.postimage.org/f5z9cqjo/2_motor.jpg) (http://postimage.org/image/f5z9cqjo/)

you will need to connect the esc cables with a y lead

(http://s4.postimage.org/f6chnihw/P_CFYL.jpg) (http://postimage.org/image/f6chnihw/)