RC Scale Boating Enjoy rc scale boating? Talk about it here.

twin motor advice please

Reply
Old 04-07-2012, 07:30 AM
  #1
tshark35
Thread Starter
 
Join Date: Aug 2010
Location: Harrogate, UNITED KINGDOM
Posts: 48
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default twin motor advice please

Could someone please advise me if useing two hpi saturn 20 t brushed motors would be a good choice to replace 2 mfa 540 motors on my mtb that's about 3ft long.its currently running 2 mfa 540 motors each supplied by a 30 amp esc with a 20 amp fused link using 7.4v lipo .both props are 38mm 2 bladed .if my research is correct each saturn motor pulls 19 amp at 7.4v at max efficiency, am I correct in assuming that my turnigy 30 amp esc should handle these motors and give my mtb that needed extra boost to plane on the water at full throttle ? Many thanks in advance for your info .
tshark35 is offline  
Reply With Quote
Old 04-07-2012, 04:29 PM
  #2
Apismelifera
 
Apismelifera's Avatar
 
Join Date: Oct 2008
Location: Schenectady, NY
Posts: 188
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: twin motor advice please

Ask you question in the "Speed Electric" forum and you probably get a lot more, and better answers there.
Apismelifera is offline  
Reply With Quote
Old 04-07-2012, 11:07 PM
  #3
lslewis
 
Join Date: Aug 2002
Location: Cape Coral, FL
Posts: 353
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: twin motor advice please

Do your self a favor, I find manufacturers specs are seldom accurate, get a watt meter, then you will know what your dealing with. It is a good investment this is a typical meter:: http://www.hobbyking.com/hobbyking/s..._Analyzer.html

To answer your question; I doubt the 30 amp ESC you have is good enough.

Larry
lslewis is offline  
Reply With Quote
Old 05-13-2012, 12:31 PM
  #4
tollytime
 
Join Date: Oct 2010
Location: xxx, IL
Posts: 9
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: twin motor advice please

I would look into a 540(36mm)sized brushless motor with 1300kv to 1500kv. I'm not sure on the amperage, Depends on what your battery setup is. I'm not an expert, but nobody else is much help.
tollytime is offline  
Reply With Quote
Old 05-13-2012, 09:00 PM
  #5
Hydro Junkie
 
Join Date: Nov 2004
Location: Marysville, WA
Posts: 6,327
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: twin motor advice please

Even better than a watt meter is an amp clamp. When properly used, they will tell you what your motor is drawing though, unless you're holding the boat still, htey can be hard to use
Hydro Junkie is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 05:33 AM.