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Zenith CruZer & Sonex Logs
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Date: 7-16-2011
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Number of Hours: 2.20
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Manual Reference: SNX-L05
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Brief Description: Misc Measuring
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It has been so bloody hot here in DFW. The official high yesterday was 107 at DFW airport. Of course, that is usually the coolest place in the summer, but it's official, so it doesn't matter if it's 110 here. it's just no fun to work on the plane when you're dripping more sweat (corrosive) into all the airfame joints regardless of how much you wipe. But enough griping.
When I rigged the wings last month, I was bothered by the perception that the wheel alignment was off and that the left side of the plane appeared to sit lower than the right. So tonight I just spent time making myself feel better.
I made up a jig using meter sticks and spacers to test the toe-in of the main landing gear. I was happy to see that there wsa in fact toe-in. I measured the distance between the front and back of the meter sticks just to make sure the front reflected toe-in. I didn't bother converting to degrees since I will be removing the main gear later on to install the wheelpants soon. At that time I will re-install the spacers that allow one to check for 0.7 deg of toe-in. Also still have to do the mandatory SB for replacing the SS bolts holding the axles on.
Next to tackle the perceived left side low issue. First off, my driveway apparently has a bit of a slope to it; I'd have to put a 3/4" board under the left wheel to level the plane. Still, I was bothered by one other point; even if the driveway sloped, the measurements from one side of the fuse to the other should be close to the same, right? As in, a sloped a/c on a sloped driveway should have at least the bottom parallel to the driveway, resulting in even distance. Mine wasn't. I then spent a lot of time measuring the length of the gear legs. One is a bit shorter than the other. I measured from many different points but kept coming up with the left side short. Finally noticed that the length of the axle tube on the right side is shorter, which gave the appearance of that leg being longer.
It's all about perception, I guess.
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