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Jim's Web Site
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Date: 10-4-2015
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Number of Hours: 9.00
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Manual Reference:
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Brief Description:
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Weather in Atlanta has been bad, as has a lot of the Southeast, for over two weeks now. I'm racing against the calendar to get the wings and fuselage back indoors before it gets too cold for working outside. This weekend, between showers, I did make some significant progress.
My goal this weekend was to get the aft wing fairing ribs completed and bonded to the fuselage and the lower fairings. The manual suggest that it is important to have this rib, which contains the flap bearing block bolted to it, parallel to the fuselage, and vertical. This will prevent binding of the flap torque tube. Other builders have had to do rather substantial flox releases to get these blocks aligned. I thought about ways to minimize this potential for misalingment, and finallly came up wht what I hope is a pretty good idea. The fuselage of course is tapered, so parallel to the fuselage means little. What the objective really is is to have the rib parallel to the centerline of the fuselage. The way I figured to do that was to temporarily screw angle iron the the rear spar box bulkhead. I carefully measured the mounting to make sure that the angle iron was vertical. This serves to make the torque tube mounting phenolic perpendicular to the bulkhead, thus parallel to the fuselage center line, and vertical. May not be perfect, but it will certainly minimize the need for flox releases. After all that, I bonded the rear ribs on, and partially reinforced them. After cure, I'll remove the angle iron and reinforce the remaining joints.
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Right aft fairing rib final fitting
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Angle iron for positioning rib
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Aft fairing ribs ready to mount
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