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Kupe's Zodiac 650B
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Date: 4-13-2013
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Number of Hours: 3.00
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Manual Reference: 6-W-12
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Brief Description: Left Aileron Balance Bar
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After a hectic week at work, I finally made it back to the shop on Saturday. The only task I worked on was completion of the left airleron balance bar. The balance bar is a long square aluminum extrusion that fits between 2 ribs in the aileron and extends forward into the (not yet built) wing. Once the aileron is mounted onto the wing, weights are attached to the forward end of the balance bar so that the aileron balances in a neutral position with no control inputs. One of the primary reasons for the balance bar is to pretty well eliminate any possibility of aileron flutter inflight.
The challenge of this part of the assembly is the ribs have to be aligned carefuly in the aileron, the balance bar needs to fit snugly between the ribs, the bar is bolted to the two ribs at a precise 94 degree angle from the verticle face of the aileron, and the bar needs to fit through a small 22 mm square hole in the front of the aileron. Needless to say, there was a lot of assembling, checking, disassembling, checking, reassembling, checking...
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The two ribs, drilled and clecoed to the balance bar.
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A side view of the balance bar assembly just before updrilling to 3/16th bolt size.
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The balance bar extending out the front of the aileron - at precisely 94 degrees!
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