Model Boat Mayhem

Technical, Techniques, Hints, and Tips => DC Motors (Brushed) and Speed Controllers => Topic started by: Maverickuk01 on June 01, 2013, 06:08:25 pm

Title: Which ESC should I fit
Post by: Maverickuk01 on June 01, 2013, 06:08:25 pm

I currently have a boat fitted with 3 x Graupner speed 500E 12v motors running through a ripmax no limit ESC. I am not happy with the performance and feel a better quality ESC would make a difference. I want to run all 3 engines off one channel. Any suggestions please {:-{

Title: Re: Which ESC should I fit
Post by: Martin (Admin) on June 01, 2013, 06:52:38 pm

"not happy with the performance", not happy with the speed range, top end speed, slow speed control?

Title: Re: Which ESC should I fit
Post by: Maverickuk01 on June 01, 2013, 06:57:59 pm

I am not happy with the top end speed and slow speed control. Since posting my question I have also been told the Ripmax does not like getting wet. As I did not build this boat this ESC was not my choice. Thanks for your interest

Title: Re: Which ESC should I fit
Post by: Netleyned on June 01, 2013, 07:04:16 pm

We model boaters like to keep our ESC's dry.

Ned

Title: Re: Which ESC should I fit
Post by: Bob K on June 01, 2013, 07:19:14 pm

My preferance is for the ACTion P94 Dual High Power twin ESC & Mixer.  Runs on 6 to 24V.  20A.
No set up required, remarkable solid and tolerant, it has the advantage that the inbuilt mixer will allow L or R props to automatically adjust speed according to your rudder position, allowing very tight turns using just a single Rx channel.
 
http://action-electronics.co.uk/pdfs/P94.pdf (http://action-electronics.co.uk/pdfs/P94.pdf)
from Component Shop http://www.component-shop.co.uk/html/esc.html (http://www.component-shop.co.uk/html/esc.html)
 
I have them in all by boats now.

Title: Re: Which ESC should I fit
Post by: Maverickuk01 on June 01, 2013, 07:22:29 pm

I need a min 30 amp ESC each of my motors have a stall amp of 10. I like the idea of the mixer though. Thanks for your interest

Title: Re: Which ESC should I fit
Post by: Shipmate60 on June 01, 2013, 07:52:40 pm

What model is it that needs 3 x 500 motors?
Stall at 10 Amps shows these are not powerful motors.

Bob

Title: Re: Which ESC should I fit
Post by: john s 2 on June 01, 2013, 08:12:28 pm

If the motors stall at 10 Amp. Then why do you require an esc that gives 30 Amps per motor. Or do you mean that you require one 30 amp esc? You could use three escs, Suitably fused of course.The lads await clarification to be able to advise. John.   

Title: Re: Which ESC should I fit
Post by: inertia on June 01, 2013, 08:33:56 pm

See diagram for Graupner Wiesel here http://http://www.action-electronics.co.uk/wd.php (http://http://www.action-electronics.co.uk/wd.php)
Runs the whole model from two channels (Throttle and Steering).
Suit yourself.
DM

Title: Re: Which ESC should I fit
Post by: RantandRave on June 01, 2013, 10:02:29 pm

 
FR30HX Controller - Heavy duty 30 amp rated microprocessor controller
 
(http://traves.webplus.net/images/green_Fr30hx.jpg)

http://traves.webplus.net/fr30_series.htm

Title: Re: Which ESC should I fit
Post by: Stan on June 01, 2013, 10:53:58 pm

Hi Maverick only uses one ESC. 3 500 motors combined stall current is 30 amps  10 amps per motor.
 
Stan

Title: Re: Which ESC should I fit
Post by: Shipmate60 on June 01, 2013, 11:08:14 pm

From Cornwall Models website.

Graupner Speed 500E (1788) Economy 540 size motor with low current drain. Ideal for tugs

Nominal voltage 12V, Operating voltage range 6-12V
No-load rpm 12000, Current drain at max. efficiency 2A
Shaft diameter 3.17mm, Weight 158g


At 12000 rpm and 3 shafts she should be flying.
What props are fitted?

Bob

Title: Re: Which ESC should I fit
Post by: Stan on June 02, 2013, 07:23:10 am

No idea.
 
Stan

Title: Re: Which ESC should I fit
Post by: Maverickuk01 on June 02, 2013, 08:04:05 am

Thanks for the replies.
My boat has 3 x 35mm M4 twin blade plastic props

Title: Re: Which ESC should I fit
Post by: malcolmfrary on June 02, 2013, 10:57:19 am

Silly question - what voltage is it running on, and what size and type of battery?

Title: Re: Which ESC should I fit
Post by: Maverickuk01 on June 02, 2013, 11:04:49 am

I will be using a 12v NiMH battery. The motors are 12v. I think I now have enough information to make a decision on which way I will go. Thank to all those who contributed

Title: Re: Which ESC should I fit
Post by: Martin (Admin) on June 02, 2013, 01:52:33 pm

Let us know the results    :-))

Title: Re: Which ESC should I fit
Post by: Maverickuk01 on June 02, 2013, 01:54:09 pm

Will do with pleasure, very grateful for the suggestions

Title: Re: Which ESC should I fit
Post by: malcolmfrary on June 02, 2013, 03:16:43 pm

Quote from: Maverickuk01 on June 02, 2013, 11:04:49 am

I will be using a 12v NiMH battery. The motors are 12v. I think I now have enough information to make a decision on which way I will go. Thank to all those who contributed

Less weight = faster boat, unfortunately also usually means less ability to deliver current and shorter run times.  Just a question of getting the right balance.