HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Oct 04, 2004, 07:03 PM
Registered User
Bob Blackburn's Avatar
UK, Greater Manchester, Manchester
Joined Jul 2004
357 Posts
contra rotating gunther props?

Hi,

Does anyone know if contra rotating gunther size props are available, even copies but must have left and right hand versions?

I have the beginnings of a heli experiment and I am struggling with the torque reaction on two clockwise rotating props.

I know I can make them but it would be better with off the shelf parts.

Gunthers are 125mmX110mm

P.S. No lessons on articulated heads please I am reasonably aware of the forces involved :-)


Cheers.
Bob Blackburn is offline Find More Posts by Bob Blackburn
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 04, 2004, 07:30 PM
Registered User
Bob Blackburn's Avatar
UK, Greater Manchester, Manchester
Joined Jul 2004
357 Posts
I forgot the piccies.

This arrangement is hard to hold down at 5volts but I need to cure the rotation before I worry about cyclic control.

I am expecting the twin contra rotors to get rid of a lot of the single rotor issues.
Bob Blackburn is offline Find More Posts by Bob Blackburn
Reply With Quote
Old Oct 07, 2004, 05:31 PM
Me likes Depron...
Pjotrrr's Avatar
Amsterdam Schiphol, Netherlands
Joined Mar 2003
1,577 Posts
Toddsmodels has some counterrotating prop sets, but not that small...

Peter
Pjotrrr is offline Find More Posts by Pjotrrr
Reply With Quote
Old Oct 07, 2004, 10:11 PM
Team 30 Micro EDF
Mike Taylor's Avatar
Camarillo, California
Joined Apr 2002
4,516 Posts
Larry Parks sells extremely light weight contra-rotating props set in a number of sizes. http://www.smarttoolsinc.com/
Mike Taylor is offline Find More Posts by Mike Taylor
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Novel idea for contra rotating props/EDF fans. vintage1 Power Systems 28 Oct 13, 2005 09:32 AM
contra-rotating props Larry Dudeck Electric Plane Talk 29 Nov 10, 2004 10:25 PM
Contra rotating props frankenfoamy Electric Plane Talk 9 Apr 14, 2004 06:29 PM
contra rotating props flyinjack Parkflyers 7 Nov 16, 2002 06:54 PM