|
|
|
|
Kurt Haller RV-9A
|
Date: 9-2-2006
|
Number of Hours: 4.25
|
Manual Reference: 6-3,4
|
Brief Description: Rudder
|
|
Donned some vinyl disposable gloves. Washed rudder stiffeners R-915 in Dawn dishwashing liquid. Used the red scotch-brite to dull the Al-clad surface. Rinsed in hot tap water. Mixed AFS aluminum etch/cleaner 1:2 with water in a shallow plastic tub. Soaked the ribs about 3 minutes in the sol'n, then rinsed again in hot tap water. Sped up drying with a hot air gun (hair dryer style--model airplane covering shrinker!) as they sat on paper towels. A couple water spots showed up--next time a final dunk in distilled water, maybe?
Made some hooks out of solid 14 AWG copper wire to hold ribs while spraying. Decided for such a small job to use a Krylon Rust Tough zinc-rich rattle-can primer. It won't seal the stiffeners in hermetic epoxy, but they're already Al-clad, and now they'll have a film of 90% metallic zinc on top of that.
Unfortunately, I held the stiffeners horizontal for spraying. One hook wire fixed to a metal shelf unit in the side yard, the other hook wire in my left hand. Spray pattern from the can is vertical (duuuh!), so I got all of the right stiffeners done, but ran out of paint on the third left stiffiner.
Went to Kragen for more Rust Tough--d'oh! Livermore store is sold out. Stopped into OSH and picked up Rustoleum's Cold Galvanizing rattle can. Basically the same thing, right?
For the last 6-1/2 stiffeners, I hung them in front of the compressor enclosure (painted with rattle-can grey too) vertically. Was a lot quicker than doing them one at a time. The Rustoleum stuff was a lot runnier than the Krylon...but even with a rattle-can spray handle doo-hickey, it's hard to get even sweeps.
OK, time to back-rivet the stiffeners to the skins. Rivet gun was set as for the training project, so a fast four count set the AN426AD3-3 rivets consistently.
|
|
|
|
|
|
|
|
|
Copyright © 2001-2024 Matronics. All Rights Reserved.
|
