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Zenith CruZer & Sonex Logs
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Date:  10-18-2018
Number of Hours:  2.30
Manual Reference:  C75-WA-3
Brief Description:  Leak test fuel tank, rivet top skin,

No rain today, so the wife's car could be moved out into the driveway, allowing the wing to be finished.

I was concerned about the fuel sending unit leaking fuel; I had tested it during tank installation, but a few weeks ago, I took a picture of the sending unit to show it's position to another builder. I had noticed some traces on the tank that looked like it had been leaking; the sealer is a non-hardening sealer, and I thought that some condensation perhaps caused the runs. But, I didn't want to get the wings all mounted and THEN determine the sending unit was leaking fuel. So, I propped-up the trailing edge of the wing and added 5 gals of gas to the tank. Using a dip stick, I determined that 5 gals basically took the tilted level to the top of the sending unit. I let it set for an hour, and no leaks! yay! Draied the fuel back into the storage tanks.

I then proceeded to rivet the top fuel tank skin and the last rib edges that held the skin attach angles. I cleco'd the upper root skin in to position (remember - not riveted until final installation) and my son helped me move it into the wing cradle.

On to the fuselage!
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Angled wing to concentrate gas near sending unit

Angled wing to concentrate gas near sending unit

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no leaks!

no leaks!

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Upper tank skin and leading edge skin angle riveted

Upper tank skin and leading edge skin angle riveted

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