Bellcrank choice for plane  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       


Canopy Rails for Warbirds
Seller:  NCIS
Details:   $20.00   |  1/2/2009   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> Bellcrank choice for plane
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Bellcrank choice for plane - 8/21/2008 3:36:38 PM   
Macommy


 

Posts: 86
Joined: 2/15/2005
From: Macon, GA, USA
Status: offline 		You guys use Bell cranks so please give advice. I have an electric .40 size aerobatic plane I want to use a Bell crank on.
It is tail heavy so I want to take the two elevator servos out of the tail and mount one in front of the rudder servo in the center of the fuse.

The servos are butted back to back with one on each side several inches in front of the horizontal stab. A control rod leaves each going to an elevator.

This is the plane, http://www.3dhobbyshop.com/detail.aspx?ID=2328

This is what I want to copy or to purchase something similar

http://www.centralhobbies.com/control_linkage/Bellcrnk.html

World models has this on their web site,

http://www.theworldmodels.com/para/products/accessoriesdetail.php?id=26&subcat=0
I don't know where to buy it or if it is light enough and good quality and the width etc.

I've been told I would do better to copy this design or find something like it. The central hobbies MK model has short arms and other problems.

The width of my fuse at that point goes from 1 & 1/2" to 1 & 3/4" at the wider point.

Basicly one carbon control rod would go from the servo to the center arm half way back and the lite weight bell crank would take this to control horns on both side of the fuse then back to the elevators. If someone has a better idea then I'll listen to that also. Thanks for the time.

John

< Message edited by Macommy -- 8/21/2008 3:44:52 PM >
       Post #: 1

RE: Bellcrank choice for plane - 8/21/2008 4:42:39 PM   
denoferth


 

Posts: 7
Joined: 9/25/2002
From: Portsmouth, NH, USA
Status: offline 		You could fabricate a music wire connector or run a “Y” shaped pushrod from one servo to both elevator halves.

(in reply to Macommy)
       Post #: 2

RE: Bellcrank choice for plane - 8/21/2008 5:56:20 PM   
arobatx


 

Posts: 1820
Joined: 1/18/2006
From: Kalona, IA, USA
Status: online 		The MK dual elevator bellcrank works very well....used with ball link ends it is slop free, and a nice choice. If you don't want to worry about the width of your fuse, if it will fit...etc. I also really like this: http://www.centralhobbies.com/control_linkage/deps1.html I've used it on several planes with good luck.

Chad

_____________________________

Chad

(in reply to denoferth)
       Post #: 3

RE: Bellcrank choice for plane - 8/21/2008 6:41:17 PM   
Stickbuilder



Posts: 5821
Joined: 11/20/2005
From: leesburg, FL, USA
Status: offline 		The bellcranks are available from Sig and Rocket City. Check your hobby shop.

Bill, AMA 4720
Waco Brotherhood #1

_____________________________

It's easy, just glue all the pieces together, and sand off everything that doesn't look like an airplane.

(in reply to arobatx)
       Post #: 4

RE: Bellcrank choice for plane - 8/21/2008 7:39:37 PM   
Macommy


 

Posts: 86
Joined: 2/15/2005
From: Macon, GA, USA
Status: offline
quote:

ORIGINAL: arobatx

The MK dual elevator bellcrank works very well....used with ball link ends it is slop free, and a nice choice. If you don't want to worry about the width of your fuse, if it will fit...etc. I also really like this: http://www.centralhobbies.com/control_linkage/deps1.html I've used it on several planes with good luck.

Chad



Someone who flies pattern for years now told me the MK bellcrank is sensitive to a very precise setup. He said many people have it suddenly slip and lose their elevator. Or they don't properly support the control rod going to the bellcrank from the servo and this causes some kind of problem. Have you seen this?

(in reply to arobatx)
       Post #: 5

RE: Bellcrank choice for plane - 8/21/2008 10:41:35 PM   
arobatx


 

Posts: 1820
Joined: 1/18/2006
From: Kalona, IA, USA
Status: online 		No, I haven't seen this happen. But I can certainly see with any good quality hardware, the installation can still beg for failure.

_____________________________

Chad

(in reply to Macommy)
       Post #: 6

Page:   [1]
All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> Bellcrank choice for plane
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.500RCU2