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indigoonlatigo(at)msn.com
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 Posted: Sat Nov 01, 2008 7:16 am Post subject: OPPS! Windscreen and faring |
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Confession time!
I made an opps! I have to say that the instruction for building the windscreen faring could be written much better for someone with instructionitis.
I have a fare amount of experience with fiberglass.
The directions tell you to use a 7 inch radius to determine the forward edge height of the fiberglass overlap onto the windscreen. The trailing height near the door intersection is determined by the curve in the door window joggle.
In any case, from what I can determine, I sanded my windscreen about one and a half inch higher than it needed to be. I didn't realize this until I started cutting the strips of fiberglass and wonderred, man if the widest strip of glass is only 3.5" and I am centering each layer of glass on top of the other, that is only going to make a 1.75" plexi glass overlap.
Some of the confusion was that the directions stated to sand the aluminum 4" forward of the base of the windscreen. Why they ask this if the widest glass layer is only going to extend 1.75" forward is beyond me.
If I were to do it all over again...I would use the height of the rear corner to define the height of the plexi glass overlap and extend that height forward and all the way around. I would make the fiberglass widths wider so that they cover more of the aluminum, but I wouldn't center them on one another. obviously, the overlap would progressively get wider over the aluminum than it does over the plexiglass.
I would also mix some flox into the micro mix for the base of the windscreen. The first few layers of glass should be wider IMO because they should slightly over lap the plexiglass and it doesn't SEE FIGURE in manual.
Because I sanded the windscreen, I did something different. Of course I was doing something different from the beginning because I was using 8.1oz satin weave cloth, so I planned on more laminations from the beginning.
I ended up using the same beginning widths but after the 3.5", I did 4, 4.5, 5, 6, 6.75.
Well, I have a bullet proof faring, I just want to say my profile and head on view will look different than the rest of them. I have never had the seats in the plane, but I don't think the view over the cowl will be too much different.
HEADS UP IF YOU AREONE WITH INSTRUCTIONITIS.
John G. 409, It almost looks like the Lancair Evolution, just kidding.
Moving on now that I have purged.
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Deems Davis
Joined: 09 Jan 2006
Posts: 925
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indigoonlatigo(at)msn.com
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| Posted: Sat Nov 01, 2008 7:57 am Post subject: OPPS! Windscreen and faring |
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Thanks Deems.
Your plane looks just great too.
JOhn G
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