In order to make more progress on the rain gutter strip, I need to lock the canopy frame
in the correct position. The most logical way to do this is to drill the popup tipup arms
to the goosenecks of the canopy frame weldment, and also to the upper, forward fuselage ribs.
I match drilled these up to 1/4". The holes in the gooseneck arms will eventually need to
be drilled (reamed) up to 3/8" to accomodate the bronze bushing which needs to be pressed in.
I actually used a reamer to get these to .250" so they would be a good fit for a 1/4" bolt.
After drilling both gooseneck arms, I positioned the canopy frame and popup tipup arms
in the space between the ribs. Because the ribs hadn't been drilled yet, there wasn't
room for a 1/4" bolt to join the popup tipup arms to the goosenecks. I cut a couple
stubs of 1/4" rod to temporarily install at those pivot points. Clamped the arms in the
correct position using some 1/8" aluminum scraps as spacers.
Lots of clamping, drilling, removing and reinstalling ribs, etc... later, both of the popup
tip arms were drilled to the ribs. The canopy frame is now well positioned so i can get
back to fitting the rain gutter strip.