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Old 04-22-2013, 05:21 PM
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Dean Bird
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Default RE: CARF-Models 2013 Series 3.1m Extra 330SC

The first of the "New 2013 series modifications and improvements" is the "Aileron hinging". I asked Andreas what that meant. He told me, "Previously it was one long hinge pin through the center hinged aileron. The aileron therefore had to have a long spar. Now it is 4 separate hinges with only short pins, no spar anymore. The aileron is not so easily removable any more but it saves approximately 100 gram in each wing."
Cool. Since I'm shooting for no less than 41 pounds and no more than 42 pounds, any help from the designer to save weight is good. A little over 7 ounces removed from the plane.
When I asked Andreasabout the "4 separate hinges with only short pins" he told me, "the short tubes are squeezed with a pair of pliers on both ends, when installed, so that they actually press slop free into the outer bearings. That way they can't create wear because there is no movement, and they will not be able to slide out. We were testing this method the full last year's flying season with Niklas Roth, a young German pilot."
Here are the pictures of the "4 separate hinges with only short pins".
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