May 06, 2012, 05:36 PM
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Australia, QLD, Woody Point
Joined Nov 2006
3,457 Posts
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I have an Opus wing here that's in the same state as Alex's D60. The spar is intact, even most of the beautiful paint job is still perfect ...but almost the entire length of the front of the wing in front of the spar has gone to total mush. I have done many complex and big repairs on moldie wings, but you need at least SOME intact wing to use as a reference for the repairs. I remember when I posted pics of the Opus wing there was a chorus of "it's fixable", but it's not.
One good thing with vac bagged wings is that you can always pull out your wing beds and re-set the whole thing. But that's a moot point, because vac bagged wings don't delam and shred to bits like moldies that have balsa skin cores.
Ampreg filling the LE would likely confer huge additional durability. I keep talking about doing it to a bought moldie but haven't yet. I'd like to buy a cheap DSable moldie that's fragile and drill holes on the underside behind the LE, one hole every 5cm or so, and inject 5 - 10mL of Ampreg into each hole. Tape over the holes, leave the wing standing vertically with the LE down and let the Ampreg foam up to 2 or 3cm deep behind the LE. Really easy to do ... someone needs to do it pronto, and see how it goes.
But making them with solid foam cores is the way to go. The Scratcho wings with skins set in the mold and then filled with Ampreg which swells while the mold closes, are just unbelievably tough. One day we're going to wonder why we ever DSed hollow moldies in dodgy places.
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Last edited by AvB; May 06, 2012 at 05:43 PM.
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