Notices
Ask the Expert Sal - Electric Airplane Advice Here is your chance to ASK SAL, the expert for all your electric flight related questions. If you are not Sal, please do not answer questions in this forum.

twin motor amp draw???

Old 04-15-2007, 06:49 AM
  #1  
Thread Starter
 
Join Date: Oct 2006
Location: Rockford, IL
Posts: 140
Likes: 0
Received 0 Likes on 0 Posts
Default twin motor amp draw???

Sal

Twin set up

using (2) e-flite power25BL motors rated at 32 continuous and burst of 44 amps

(2) CC45 esc with a Y harness to (2) lipo's in parallel, BEC disabled on both , using RX battery

Question

When using 2 motors, each have an amp draw rate, HOW do you select the lipo's
do I select a battery rated at one motor amp draw 32/44 amps and go up from there???
or do I treat this as one motor at 62/88 amps and go up from there ???

when you wire in parallel the mah are at x2 ( 2 6000mah batterys =12000mah
but do the continuous and burst amps also x2 when in parallel, I know the volts stay the same buit do the amps????

Thanks
Dave

Thanks
Dave
Old 04-15-2007, 04:14 PM
  #2  
Junior Member
 
Join Date: Apr 2005
Location: Spring Grove, IL
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default RE: twin motor amp draw???

Hi Dave,

Yes, you can treat this as one motor at 62/88 amps .
And yes, the continuous and burst amps are 2x when in parallel....

Best of luck ,

Brad
Old 04-15-2007, 06:01 PM
  #3  
Thread Starter
 
Join Date: Oct 2006
Location: Rockford, IL
Posts: 140
Likes: 0
Received 0 Likes on 0 Posts
Default RE: twin motor amp draw???

Thanks Brad


Dave
Old 04-19-2007, 01:01 PM
  #4  
Senior Member
 
Join Date: Aug 2002
Location: Williston, VT,
Posts: 218
Likes: 0
Received 0 Likes on 0 Posts
Default RE: twin motor amp draw???

Of course the total draw of the motors will depend on what prop, how many cells, and what is the discharge rate of the battery but for example: Let's assume that we are using a 3-cell li-Poly battery. If each motor with designated prop draws 25 amps. Then you will need a battery that can handle 50 amps or more continuous. so two motors double the draw. You might also consider two batteries depending on how the batteries will fit best in the airplane.

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
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Thread Tools
Search this Thread

Contact Us - Manage Preferences Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.