SMALL - Telemetry SMALL - Radio
Thread Tools
Old Feb 11, 2012, 04:42 PM
zeezee is offline
Find More Posts by zeezee
Yea, I fly dusty planes..
zeezee's Avatar
United States, LA, Angie
Joined Apr 2009
2,052 Posts
Cool
Contra-rotating motor

I was scanning some RC sites this A.M. and saw a contra-rotating motor and am curious as to what the benefit of using one would be. I believe reduction of torque or elimination would be one, but what else. I know how twin blades work on a co-axial heli with two motors and inner and outer shafts. How do you get two shafts spinning in different directions? Some type of gearing? Dave
zeezee is offline Find More Posts by zeezee
Last edited by zeezee; Feb 11, 2012 at 04:57 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Feb 12, 2012, 06:35 PM
rob.rice is offline
Find More Posts by rob.rice
Registered User
Joined Jan 2012
25 Posts
2 motors one wired for CW the other wired for CCW on the same ESC
rob.rice is offline Find More Posts by rob.rice
Reply With Quote
Old Feb 12, 2012, 07:25 PM
olmod is offline
Find More Posts by olmod
Good Better Best quest.
olmod's Avatar
Australia, VIC, Cranbourne East
Joined Apr 2004
10,574 Posts
There is a good thread in power systems that should help.
olmod is offline Find More Posts by olmod
Reply With Quote
Old Feb 12, 2012, 09:06 PM
scatsob is offline
Find More Posts by scatsob
Bypass Ratio = Infinity
scatsob's Avatar
United States, NC, Jacksonville
Joined Apr 2006
1,653 Posts
No gearing, on shaft for the front bell and one shaft for the rear. In theory this setup eliminates prop wash and increases efficiency. I am building an ESM spitfire with the big version of what you have in the picture. There is also a thread in this forum where several people have made their own CR motors.
scatsob is offline Find More Posts by scatsob
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion contra-rotating motor from AEO Technology AEOTech Power Systems 127 Feb 28, 2015 04:57 AM
Discussion HobbyKing CR23L Contra Rotating Brushless Motor aerophilia Power Systems 39 May 06, 2013 01:24 PM
Discussion Contra rotating motor question milo12 Power Systems 6 Sep 25, 2011 04:36 AM
Pogo #2, Contra-Rotating Motor Ed Couch Scratchbuilt Indoor and Micro Models 8 Nov 30, 2004 11:05 AM