REFLECTOR: Aileron Turque Tube

[Joe]

Al,
Thanks for your reply.  Useful information as usual.  To your first point about purchasing from Velocity,  I would love to give the sales to Velocity but,  that would cause a delay in my current schedule.  I am preparing a painting session for this weekend and I would not have this unit ready in time.  My past experience with Velocity is slow in the delivery area.  It may be due to UPS, but here is an example: some months on a Tuesday, ago I placed an order with Velocity I then placed an order from AS&S.  In both cases the items were stock.  On Thursday I received the AS&S order, on Wednesday of the following week I received the Velocity order.  2 days vs. 8 days, so when I need something expediently I order from AS&S.  This is not meant to detract from Velocity, but for me transit time is often important to an efficient building process on a kit that has parts missing.  Not having a web site or current catalog does not help in the time management department either.

Since the left aileron was constructed to the manual's specifications I will do the same for the right, so at this point I need a 10" section of alum tubing.
 
Thanks for the balance of the info, sound like the U-Joint is the wasy to go for my application.

Joe
  ----- Original Message ----- 
  From: Al Gietzen 
  To: 'Velocity Aircraft Owners and Builders list' 
  Sent: Monday, August 23, 2004 11:51 AM
  Subject: RE: REFLECTOR: Aileron Turque Tube


  Subject: REFLECTOR: Aileron Turque Tube



  Joe;

  1.      When I purchased, my kit the aileron torque tubes were missing.  I believe they are 3/4 with a .065 wall.  Can anyone confirm the dimensions and let me know what grade is used.



  You have the dimensions correct, but seems you could call Velocity and have them send it to you.



  2.      I remember a discussion on this subject where someone indicated he eliminated the connection at the aileron and used 1 piece of tubing from the aileron to the bell crank.



  Yes; you can eliminate the connection (and U-joint) at the aileron by putting a slight bend in the tube just at the exit from the aileron.  This does introduce more "springyness" into the system, and you may not want to take this approach, especially with the long-wing version or XL.  You may also want to consider going to SS tubing, although IMO it is not necessary if you use the U-joint.



  3.       Under this arrangement, how does one check/correct the balance of the aileron?



  Good question.  For balance you are basically interested in the vertical inertia of the mass distribution.  The torque tube is supported at the end by the bellcrank bearing, so if you consider it to be 'rigid' it is not an element in the balance equation.  You then balance the aileron without the tube.  The problem is; you generally want to complete the tube installation prior to finish work, and once the bent tube is in place you can no longer balance the aileron in any simple way.  You either do finish paint on the aileron and balance before installing the tube, or; as I did, allow for a couple ounces of paint, and assume it's close enough.



  Al



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