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ThunderTiger Rare Bear
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07-28-2012 | 01:12 PM
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Cougar429
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Tecumseh, ON, CANADA
RE: ThunderTiger Rare Bear
Here is the product of a few days effort. I followed my common technique and sandwiched glass cloth between two thin layers of ply and allowed it to dry. The first two ribs from the root are 4 bids added and the outer is 8 bids added. The remainder of each sheet will be used to add doublers and gussets. along with a reinforcement to the root rib.
Ripping off the lower skin allowed me to get at the stock ribs and they were very easy to remove. I also opted to hack out the original shear web as the grain was aligned with the spars, (DOH!) and this also allowed me access to fit the new ribs directly to the spars and gear mount assembly. Removing the original tube sleeves was a bit of work to ensure they came out undamaged. Phew:rock:.
I also followed a plan that added a bit of extra work. Since the stock ribs were damaged and not to be trusted I repeatedly mounted the wing to the fuse, held it in place and slid the joiner tube in from the opposite side of the fuse. Once against the next rib in sequence I marked where the cutout had to go. Rib 2 was a bit of a mess and the doublers will cure that anyway. Once everything is in place there will be epoxy and flox added and the much tighter fitting doublers sandwiched against the ribs. Squeezing out any excess epoxy mix should ensure a good bond from the tube to the ribs.
Final fitting of the outer rib is the next step and once that is done I can start by adding balsa runners to the top and bottom of each rib to provide a greater bond area for the skins. Unfortunately I hopped over to the LHS this morning to find they were closed from this date for a weeks vacation!:yikes:.
Oh well, it's not like I don't have several other projects on the go. Hoping to put the first flight of the Harvard with the new retract installation tomorrow.
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