For those with slider canopies. It appears common for most builders to enlarge or oversized drilled holes in the plexi canopy for fasteners (screws or rivets) attaching the sliding canopy to its steel frame. This allows for some thermal expansion and may reduce some inherent stress from slight alighment issues.
However, I can?t find if builders are typically over sizing the holes through the plexi windscreen where it attaches with #6 screws to the rollbar. If so, by how much, as #6 screws require a fairy small countersink. Thus, the expanded hole can?t be enlarged very much. I think a #6 screw requires ~#21 drillbit (I was thinking of drilling up to #17: but that may be too much). If course, the fiberglass fairing is build up over this area as well as these screws, as well.
I would be interested in anyone?s response.
However, I can?t find if builders are typically over sizing the holes through the plexi windscreen where it attaches with #6 screws to the rollbar. If so, by how much, as #6 screws require a fairy small countersink. Thus, the expanded hole can?t be enlarged very much. I think a #6 screw requires ~#21 drillbit (I was thinking of drilling up to #17: but that may be too much). If course, the fiberglass fairing is build up over this area as well as these screws, as well.
I would be interested in anyone?s response.