Section: 42
Hours: 4
Today I shot the top coat on the floor cover panels. I used my new DeVilbiss spray gun and Stewart Systems EkoCrylic Dawn Patrol Gray epoxy paint. In the last couple days I watched the YouTube videos on how to prep and shoot this painting system https://www.youtube.com/playlist?list=PLA25476026D68521C
I had already primed the parts using EkoPrime epoxy primer so today I scuffed the parts using Scotch Brite maroon pads and then blew the parts off with compressed air, followed by a wipe down with a lint free rag soaked with rubbing alcohol. I set the air pressure to the recommended setting of 20-22 psi and layed down 2 fog coats separated by 10 minutes and then applied a wet coat.
I had problems getting good atomization for the fog coat spray. I ended up with rather large droplets and I'm not sure if it is a viscosity problem or air pressure/spray gun adjustment problem. Also, since the epoxy paint uses water for thinning, it tends to bead up on the the parts rather than flow out. In revisiting the videos, I discovered that they sparingly used 90% alcohol for the final rub down. I used 70% rubbing alcohol rather generously so that may have caused some of my wet out problems.
I weighed out the resin on my gram scale. The instructions specify that you divide the weight of the resin by 3.3 to compute the amount of catalyst and divide by 3 for the water. I added the catalyst and carefully mixed them together and then added the water. I may not have waited long enough for catalytic induction before adding the water. The video recommends 10 minutes. I'll have to double check that next time. I didn't have a viscosity cup so I'm not sure what viscosity my catalyzed and thinned mixture came out to.
If you don't get the fog coat even, the wet coat does not flow evenly. I ended up with quite a bit of orange peel on the finished parts. I like that the epoxy paint seems very tough and has a nice high sheen finish, but I will have to learn how to apply it with a smoother finish. I'll try color sanding the parts I just shot, but that is a lot of work...
Disclaimer: This blog is to provide others insight into my experience and for my own historical purposes. Airplane construction is a serious affair. I have no authoritative skills relating to airplane construction. As such, any use of the information contained on this blog is at your own risk.
Showing posts with label Section 42. Show all posts
Showing posts with label Section 42. Show all posts
Wednesday, October 5, 2016
Thursday, September 22, 2016
Section: 42
Hours: 6
I primed the cover plates this morning while it was still cool.
This afternoon I scrubbed up the upper forward fuselage parts so I'll be able to prime them tomorrow morning.
Hours: 6
I primed the cover plates this morning while it was still cool.
This afternoon I scrubbed up the upper forward fuselage parts so I'll be able to prime them tomorrow morning.
Tuesday, September 20, 2016
Section: 42
Hours: 3
I spent a few hours this afternoon washing the cover plates and prepping for primer painting.
Woody always supervises operations involving the hose and water.
Hours: 3
I spent a few hours this afternoon washing the cover plates and prepping for primer painting.
Woody always supervises operations involving the hose and water.
Sunday, September 18, 2016
Saturday, September 17, 2016
Section: 42
Hours: 4
I finished doing the inventory for the finish kit and then reviewed the chapter 42, titled Miscellanea, which shows how the various cockpit cover and finish pieces go together. I think I will paint all these parts at the same time as I do the interior. Now that I see what they cover I also know what I will have to mask off before painting.
All the pieces with blue wrapping are from the finish kit. They cover up the central wiring and cabling tunnel and the area under the seats that give access to the wing plumbing and wiring. All these parts are screwed on so they can be removed to access the wiring and plumbing later.
I could not figure out how to get the F-01439 seat ramp cover to fit. The bend in the seat ramp panel does not match up with the bend in the seat cover panels. I wrote to Van's tech support to ask if the part is correctly manufactured, but I won't hear back from them until sometime next Monday.
Hours: 4
I finished doing the inventory for the finish kit and then reviewed the chapter 42, titled Miscellanea, which shows how the various cockpit cover and finish pieces go together. I think I will paint all these parts at the same time as I do the interior. Now that I see what they cover I also know what I will have to mask off before painting.
All the pieces with blue wrapping are from the finish kit. They cover up the central wiring and cabling tunnel and the area under the seats that give access to the wing plumbing and wiring. All these parts are screwed on so they can be removed to access the wiring and plumbing later.
I could not figure out how to get the F-01439 seat ramp cover to fit. The bend in the seat ramp panel does not match up with the bend in the seat cover panels. I wrote to Van's tech support to ask if the part is correctly manufactured, but I won't hear back from them until sometime next Monday.
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