Model Boat Mayhem

Technical, Techniques, Hints, and Tips => BRUSHLESS Motors and Speed Controllers => Topic started by: darrencuk on July 29, 2011, 09:11:58 am

Title: Brushless motor
Post by: darrencuk on July 29, 2011, 09:11:58 am

How do you work out on a brushless outrunner motor how fast there going to be I'm just confussed over the hole thing

Title: Re: Brushless motor
Post by: MikeA on July 29, 2011, 09:22:16 am

the motor speed is in Kv if a motor is for instance 2300Kv

that means 2300 rpm per volt

if ya have a 2300kv motor and stick it to a 7.2 battery

you do 2300 X 7.2 = 16560 rpm

Title: Re: Brushless motor
Post by: darrencuk on July 29, 2011, 09:38:40 am

What happens if u run 7.4 sorry for all questions xxx

Title: Re: Brushless motor
Post by: MikeA on July 29, 2011, 09:45:55 am

use the same formula. what motor are you looking at? take the kv mulitply it by the battery volts and theres ya answer

Title: Re: Brushless motor
Post by: john s 2 on July 29, 2011, 06:09:10 pm

Please remember this is only approx Battery voltage can vary as can revs under load. John.

Title: Re: Brushless motor
Post by: Meyer on August 07, 2011, 10:14:23 pm

Hi , can any one recommend a charger for 5000 mah lipo battery 2cell (2s) 7.4v I'm looking for a mains charger 240v if available,
thanks again,

Title: Re: Brushless motor
Post by: Nige52 on August 08, 2011, 07:58:05 am

IMAX B6 will charge most batteries. I find them excellent value as they will charge all Lipos, Nimahs, Nicads, Lead Acids, even the new LiFe batteries.
Nige  :-)

Title: Re: Brushless motor
Post by: Martin (Admin) on August 08, 2011, 01:08:24 pm

Re IMax B6 charger - http://www.rcgroups.com/forums/showthread.php?t=746574

Title: Re: Brushless motor
Post by: John Mk2 on August 08, 2011, 06:59:20 pm

Quote from: Nige52 on August 08, 2011, 07:58:05 am

IMAX B6 will charge most batteries. I find them excellent value as they will charge all Lipos, Nimahs, Nicads, Lead Acids, even the new LiFe batteries.
Nige  :-)

Been using a B6 for over 3 yr's now on a laptop p.s.u & car battery at the lakeside  ok2  Not missed a beat  :-))