Now we install L-angle stiffeners to the rear bottom wing skins:
This is an easy job with the top rear skin removed. We trim the L-angle piece to length, pre-drill it, and then drill and cleco it into the bottom rear skin:
We'll share the position measurements and exact details with the final drawings. The Upgrade drawings are nearly finalized (which will allow us to then release and ship the Upgrade Package kit) and allow us to finish the upgrade on our Zodiac XL
Here's the video clip of us installing the L-angle stiffeners to the rear wing skins:
The CH 650 model already incorporates the L-angle stiffeners on the top rear skin. The CH 650 model also has diagonal L-angle stiffeners in the rear fuselage side skins.
Here's a view from inside a CH 650 fuselage under construction:
Note of Corrosion: As we've disassembled various sections of the factory demonstrator Zodiac XL to install the Upgrade Package, we've inspected for any signs of corrosion, and though it was built back in early 2001 this aircraft shows virtually no signs of corrosion anywhere. The 6061 T-6 aluminum alloy and the blind rivets have held up very well. The only signs of corrosion that could be found anywhere was minor surface oxidization on chrome-moly steel parts where the paint had rubbed off (on the rudder pedals).
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