While working on my in cabin FG lamination repair, I have started to cut sections of marine ply ready to glue to the upper skin.
I was looking closely at unpainted/uncolored linc fence FG tensioning rods(Lowes 2$). Looking close at this product, it looks like it is constructed of parallel course FG fibers, rather than random fibers. I think it is the same engineering makeup of those target bows for shooting. This made sense to me, has the extreme tensile strength of this just 5/8 X 1/4 X 48" rod, would require it to have the same structure has tree fibers. I'm restricted to 3/8" between skins, so that leaves me the option to incorporate other load resistant/FG friendly material in the mix. What I don't like is the smoothness of the material, so I would need to roughen the rods for adhesion.
It occured to me that fence tensioners of galvanized steel of the same dimensions could be imparted with the slight bend of the cabin roof(just enough not to crack the coating.) Better still, galvanized hardware rod of 1" wide X 1/4 would be better choice. The area that needs a rebuild is 24" X 4'. Just 2 on the roof spaced 12" apart would add to the strength. The only thing I need to solve, if it is something to be concerned about is expansion to the sides due to heat and differing FG expansion rates, and, compression at the sides when someone or a load is on the roof.
I will use the FG material for other purposes, as this is exactly what I need for encapsulating to help alleviate rudder tortion problems and the resulting external crazing BWL. (In my opinion it required another 2 plys at this location.) I'd place 2 to a side horzintally on the inside at the tumble home.
They also make this rod in aluminum, but I would rather not use this as it has no tortion and spring back strength laterally. To it's credit, this exterior aluminum is probably 6061.
Your thoughts?
I was looking closely at unpainted/uncolored linc fence FG tensioning rods(Lowes 2$). Looking close at this product, it looks like it is constructed of parallel course FG fibers, rather than random fibers. I think it is the same engineering makeup of those target bows for shooting. This made sense to me, has the extreme tensile strength of this just 5/8 X 1/4 X 48" rod, would require it to have the same structure has tree fibers. I'm restricted to 3/8" between skins, so that leaves me the option to incorporate other load resistant/FG friendly material in the mix. What I don't like is the smoothness of the material, so I would need to roughen the rods for adhesion.
It occured to me that fence tensioners of galvanized steel of the same dimensions could be imparted with the slight bend of the cabin roof(just enough not to crack the coating.) Better still, galvanized hardware rod of 1" wide X 1/4 would be better choice. The area that needs a rebuild is 24" X 4'. Just 2 on the roof spaced 12" apart would add to the strength. The only thing I need to solve, if it is something to be concerned about is expansion to the sides due to heat and differing FG expansion rates, and, compression at the sides when someone or a load is on the roof.
I will use the FG material for other purposes, as this is exactly what I need for encapsulating to help alleviate rudder tortion problems and the resulting external crazing BWL. (In my opinion it required another 2 plys at this location.) I'd place 2 to a side horzintally on the inside at the tumble home.
They also make this rod in aluminum, but I would rather not use this as it has no tortion and spring back strength laterally. To it's credit, this exterior aluminum is probably 6061.
Your thoughts?
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