Rear spar bolt access through rear windshield.

[jdmcbean]

The rear corners are bent up for clearance when the wings fold... otherwise the windshield will cut into the fabric on the #1 rib as the wing fold back.

[jtpitkin06]

I notice the windshields are trimmed differently on these aircraft.

On one the windshield extends laterally beyond the outboard edge of the butt rib and overlapping the #1 rib.
On the other, the windshield is trimmed even with the outboard edge of the butt rib.

Anyone have a preference on this?

John Pitkin
Greenville, TX

[HighWing]

John,

I am holding my breath on your question. That is exactly where I am on an LP Aeroplastics windshield. My series V instructions says to trim to the edge of the butt rib, but then again is also says to clecko the windsheild in place so my presumption, it is referring to a Laxan windshield.
My guess is that the overlapping example is a Lexan windshield on a Model IV and that was the original instructions on that model. I think that the Lexan being able to take some pressure without failure, an overlap with a less than perfect fit would work. I suspect with the acrylic windshield it could result in cracks with some pressure from the #1 rib. I hope someone responds soon as that is my task tomorrow - trim the sides.

Lowell

[Dick B in KY]

For what it's worth, I trimmed my LP windshield to the outboard side of the butt ribs and drilled the mounting holes on the inside of the butt rib capstrip. By the way, my aircraft is a SuperSport.

Dick B

[jtpitkin06]

I think I will trim my skylight flush with the outboard edge of the butt ribs as directed in the manual. I can see there might be a chance for the wing to wedge the overhanging plastic when unfolding and cause a crack. I don’t know if wing flex could cause any problems in flight, but it’s best to avoid any.
The only advantage to overlap I can see is slight rain protection at the butt rib to wing rib joint.



Clecos make sense as you'll need to drill the screw holes twice. Once for the screw hole in the rib and again for screw clearance in the plastic to avoid stress points.


JP

[cap01]

this is how the windshield was trimmed on my model IV for access to the aft spar attach bolt .

[jtpitkin06]

Cap01

very clean and neat. Nice detailing.

[cap01]

thanks john , i wish i could take credit for it but i cant .

[Pingert]

Thanks Chuck looks very clean sure helps to see different finishing touchs