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NC12350 Monocoupe 110 |
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Ailerons |
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As you can see from the picture to the right, I received a good right aileron and most of the left aileron. The right was actually usable and the left wasn’t repairable. Since I had to make a new left aileron I decided to make a new right one while I was at it. |
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First task was to make a really flat and true jig table large enough to layout each aileron. I then used the originals to layout a pattern on the table.
Hardest part was to make the trailing edge. It has a compound shape which took multiple passes on the table saw to get the correct original profile.
The jig had plenty of wood blocks screwed in place as needed to hold everything really well. |
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I got one aileron bellcrank in very good shape and gave it to George Evans at Evans Aviation to use as a pattern to make another one. |
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The finished new ailerons are shown alongside the originals. |
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Right aileron about ready to come out of the jig, just need to cut off the extra trailing edge. |
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Plastic wrap taped to the jig table surface protects the jig, allows you to see the lines marked on the jig and any excess glue won’t stick.
The ailerons were a fun part of the project. Manageable in size, and easy to see progress and reasonably short time to finish up.
The trailing edge piece was steamed in the tip bow steamer to facilitate the bending to shape. |
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Aileron Hinge Drawings
Here are two links to files which are scans of drawings for the Monocoupe aileron hinges. They are pretty poor quality and hard to read, but if you stare at them long enough, it will start to make sense! The second link has a little better readability and detail. Note the size of the files. Also, the pictures below, of my original hinges, should help decipher the drawings. Also, the pictures below, of my original hinges, should help decipher the drawings.
The best way to do this is to right click on the link that follows and select “Save target as...” to save the drawing (.jpg) to your local hard disk. You can then view the file with whatever program you normally use to view pictures.
Link to aileron hinge drawing #1 (14.0 MB)
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An original hinge on the aileron false spar.
I replaced these with mil-spec extruded hinge. |
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This is what the corresponding hinge looks like on the aileron. The notch in the top piece, right in the center, is for the aileron horn.
I couldn’t find the orginal center piece, the long one that goes vertical (it’s in a box somewhere), so I simulated it to give the idea. The long vertical piece is captured by AN4 bolts that hold the aileron horn on.
One of the pictures higher up on this page, shows this hinge on an original aileron before I took it apart. |
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Final installation of ailerons, including drilling for 8-32 countersunk machine screw used to attach hinges to structure. |
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The aileron cables cross in the bay just in board of the pulleys. Need to make sure they do not rub against each other. |