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Old 10-06-2012 | 12:52 PM
  #230  
VincentJ's Avatar
VincentJ
 
Joined: Mar 2011
Posts: 4,994
Received 186 Likes on 166 Posts
From: Hancock, NH
Default RE: Sig Ryan STA

I've been busy in the shop today. I spent most of the day deciding how I wanted to transition the aileron tipto the wing tip. As I said in an earlier post, the plans are vague in how this is accomplished. This is my interpretation of how I thought it should be done as you can see in the photos. It took quite a bit of time getting the fit just right

Anotherchallenge was to hinge the ailerons and flaps using Robart hinge points. Ihave used these hinges inthe past with great success, however this was my first attempt at using them in a "scale" type situation. I had already decided which bays that I wanted them to go in. You can see that I added the necessary blocking these hinges need . I drilledall of the holesusing the drill press to ensure all holes were straight. Now it's time to installthe hinges...each hingehad to be sunk pretty deeply into the aileron leading edge. I first marked/scribed with a pencil the hinge centerpoint visible in the photo. Next was setting up a simple back stop on the drill press to act as a depthgage to ensure all 6 holes were sunk at the same depth. I used the small drum sander that comeswith a Dremelgrinder that I'm sure everyone is familiar with chucked in the drill press..After all holes were countersunk I had to sligtly further enlarge the first 1/8"of the hole by handusing a drill bit.This is done because if you notice on the Robart hinges they are slightly tapered near the knuckle end. If you ommit this step the hinge will never seat properly. The holes in the wing's trailing edgedid not need any further enlarging due to the fact that the hinge standsproud of the trailing edgefor it to work correctly in this application.


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