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Matt Dralle's RV-8 Project
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Date: 7-6-2009
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Number of Hours: 3.00
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Manual Reference:
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Brief Description: Rigging Ailerons & Flaps - Part 1
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Well, this project took a whole lot longer than I thought it was going to. But, in the end all of the fiddling around paid off and I proved tonight using the 'ol digital level that the control throws are in perfect spec!
First you attached this little jig to each of the aileron bell cranks in the wing. This sets the neutral position of the bell crank and gives you a reference for neutral for the aileron. But then you have to make this little wooden jig to attach to the wing tip using the tooling holes in the end rib to find the exact neutral position for the aileron. Once these two are perfectly centered, you adjust the length of the short push rod between the bell crank and the aileron to the exact length necessary. Once this is done on both the left and right sides, you go into the cockpit and exactly center the control stick. Lastly, you adjust the lengths of the long aileron push rods so that the stick remains perfectly centered. Once that's done, your ailerons are perfectly rigged.
Once the ailerons are rigged, you can use them to rig the flaps. The flaps attached to the flap motor via the flap weldment in the fuselage and though two small push rods that you have to fabricate and adjust to get just the right position. Took a while, but it came out very nice and the flaps work as great as the ailerons.
I have to make a couple of small control stops for the ailerons yet, but for the most part the control rigging is complete! Yahoo! Best part is they all work extremely well. The ailerons give 32 degrees of UP, 17 degrees of DOWN, and the flaps give 40 degrees of down (in three steps), all of which match the designed throw limits perfectly.
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Aileron Centering Jig
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Aileron Centering Jig
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Aileron Centering Jig
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Copyright © 2008-2024 Matt Dralle. All Rights Reserved.
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