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Q500 aileron torque rods - 7/5/2008 4:19 PM   
wkevinm


 

Posts: 230
Score: 100
Joined: 9/17/2004
Last Login: 6/17/2013
From: Calgary, AB, CANADA
Status: offline 		I am wondering what folks are using for your aileron torque rods.

I make a vacuum bagged foam, balsa & glass wing and use a .005" FG sheet for a skinned hinge. Other dimensions;
-wing center to aileron start 4"
-aileron length varies from 10"-12"
-aileron width varies 1.25" - 1.5"
- torque rods use collars on drive ends with 4-40" allen head cap screws

In the past I had used 1/8" music wire and extend the rod to the center of the aileron but in an attempt to reduce weight I have been reducing wire diameter. The last wing I used 3/32 and found the torque rods are not stiff enough and the ailerons are mushy on roll.

I saw pictures in a post somewhere of people using larger diameter(relative) hollow aluminum torque rods and am curious about sizes and experience with this as well attachment methods.

Kevin M

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RE: Q500 aileron torque rods - 7/17/2008 10:52 AM   
SSAN



Posts: 515
Score: 105
Joined: 1/19/2002
Last Login: 4/23/2013
From: Tempe, AZ, USA
Status: offline 		Kevin,

You can use the DU-BRO "Heavy Duty E/Z Adjust Strip Aileron Horn Set" cat no. 558. This is what we use for our Q-500 wood kits and has work wonders for the stiffness we were looking for. I would recommend that if you're looking for a nice and stiff aileron torque rods. See web link below for torque rods info!

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD948&P=7

BTW... Wing center to ailerons should start at least 6-7 inches or more for most effective ailerons response. Depending on your airfoil design, 10-11 inches by 1.5" would be fine. Anything more is not necessary and may create fluttering at high speed if ailerons size are too long or too big. Just a thought!

Hope this helps.

Sam

_____________________________

Precision Composites Manufacturing
www.Sam-RaiRacing.com

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RE: Q500 aileron torque rods - 7/17/2008 5:38 PM   
StanDouglas


 

Posts: 117
Score: 100
Joined: 8/28/2003
Last Login: 3/24/2010
From: Austin, TX, USA
Status: offline 		I use 1/8" welding rod. Which I copied from the Neme-Q. I thread the ends 6-32 to accept the large horn brackets. The rod is heavy, but my Q500's come out under 3 1/2 lbs. I would suggest you need to look elsewhere to save weight. The Quik-V (Jim Allen design) starts the aileron at 5" from the center.

Welding rod is relatively inexpensive. For bearings I use Dave Norman's method of epoxy and Crisco. You can see this method in his write up on the NMPRA.org website under Techniques/Skinned Hinges. While you're there take a look at the V-tail hinges by Bill Vargas.
Skinned Hinges Minnesota Style

V-Tail Skinned Hinges

Stan D.

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RE: Q500 aileron torque rods - 7/19/2008 4:02 AM   
AllanU



Posts: 48
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Joined: 7/19/2002
Last Login: 3/7/2013
From: St.Albert, AB, CANADA
Status: offline 		Hey Kevin

1/8" weldable rod from Canadian Tire. Just bought 2- 3 foot lengths today for $1.99 each. I have done the crisco and epoxy thing but now use aluminum tubing. It adds next to nothing for weight. and seems to be alot smoother of an operation. I found that the epoxy seems to have a problem with thermal expansion and contraction greater than the steel rod leaving them stiff when cold. But it is never cold when we fly in Alberta.

I have done both methods for linkage. Bend to an angle and thread or leave them cut straight and use the wheel collar and 1-1/4 x 4/40" bolt. I now use the later since it will be easier to do the bagging with the mylar.

Aileron length 11 1/2" starting at 5" from center of wing. Aileron width 1-5/16"

AL

< Message edited by AllanU -- 7/19/2008 4:04 AM >

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