Wing Lockers and additional wing stiffeners

I originally installed per the drawings, but I have 2 Dzus fasteners on either side to hold down the door. I wasn't happy with 2 L angles and talk at the time, 4 years ago, was to add at least one additional stiffener. And I didn't like the way the hinge protruded or that the door was in the way when opened if you were loading from the front, figured I would address these issues later. Now is later ;-) Pictured above is Version 1.

First, I don't believe that the wing locker door is structural and inflight movement with the softer wing seems logical. I added an additional L angle in the center, .025 with 20mm flanges. It's a bit bigger than the stock ZAC L angles. Version 1 uses shims to compensate for the 1/8" extrusion and a .025 40mm full length strip to slide under the extrusion, it is notched for rivet clearance. I used a new piece of Aluminum to match the opening.


Version 2 uses the existing door.

I used a strip of .025 40mm to cover the gap and hold down the front edge.

The center stiffener is used to maintain pressure on the front and to pull down the rear of the door. This required a bit more effort bending the center L angle, but it does offer a lighter option than Version 1, 3 ounces and is lighter than using a hinge.


I mentioned earlier that I had added false bottom rear ribs and expanded on that to the remainder of the wing. This adds 8 ounces to each wing, 1 pound total.

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Comment by Jeff Webb on April 13, 2010 at 7:45pm
Jake,

You have inspired me! I have never really liked the hinge on the wing locker. I have an idea, based on your idea, and will try it out. It's only in my head right now but I will keep you posted! ....So far, the only 2 things I don't like about this airplane is the the wing locker design (not the option,,I like that) and the nose gear. If I could put a Gruman or RV style on it I would but I probalby won't.

Thanks!
Comment by David Gallagher on February 27, 2010 at 6:42am
Look good Jake. I love my wing lockers. Only use them on long trips, but they pay for themselves then. Only issue is that they are not waterproof so pack accordingly.

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