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Date:  1-17-2019
Number of Hours:  5.00
Manual Reference:  Sec 9; DWG 41-43
Brief Description:  More Canopy Frame Adjustments

So…it was wishful thinking when I said in the last post I was done with the canopy frame adjustments. The sides were almost what I wanted and then I checked the top (both fore and aft). This was a different story. The rear bows of the canopy frame closely match the contour of the F-7112 “Turtle Deck” upper aft skin but are inset about 1/16”. When viewed from the front, the roll bar should look centered on, and symmetrical to the canopy frame forward bow. Here’s where the problems started; the canopy frame was not centered and the contour of the back skin did not mimic the back-canopy frame. This led to Plan “B” …I used the same concept to adjust the frame, but this time everything (sides-forward and rear top) had to be manipulated at the same time so any one adjustment for curvature could be compensated for in every bend. I did this by getting the front where I wanted it and clamping it down onto wood blocks, but this time I made an adjustable ‘frame stretcher” by taking two 1x3 boards that are longer than ½ the distance between the fuselage sides. When I needed to create a curve to match the sides, I pushed these two boards outward to about ¼” more than the bend required and clamped the boards together. Then I used the ratcheting hold-down straps on either side of the clamped boards to create my bends. Magically, this also centered the canopy frame on the center of the roll bar. I did this process every 3 inches from fore to aft, and it appears like everything is lining up properly. I still have to cut off about ¼” of the frame holding the wheel assembly and make some adjustments on the back-sliding rail before I’ll know if everything matches curvatures. I’ll do those tomorrow.
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Adjustable Board Pushing Out

Adjustable Board Pushing Out

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All Curves & Centers seem OK

All Curves & Centers seem OK

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