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Michael Valentine
Joined: 09 Jan 2006
Posts: 108
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 Posted: Wed Jun 21, 2006 5:50 pm Post subject: Engineering or Voodoo? |
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Listers - need some help again - on the Landing Lights.
The acrylic shield is approx. 280mm wide. The opening is 235mm wide.
The guide says slide it toward the rib and then slide it back toward
the riblet. I'm 95% sure that it is not physically possible to do
with the lens unit installed.
Do I not understand physics or do I lack Voodoo powers?
Also, related question - the shield is not quite flush with the nose
curve. Any reason I can't heat it a bit to make it fit?
Please inform...
Thanks,
Michael Valentine
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dredmoody(at)cox.net
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| Posted: Thu Jun 22, 2006 4:22 am Post subject: Engineering or Voodoo? |
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I found that you have to trim at least the corners of the shield to get it
in place through the hole once the light bracket/channel is in place. Heat
is not a problem as long as you don't get carried away with it. Trouble is,
by the time you figure out that you got carried away with it, it is too
late. Just get it to feel warm to the touch and it will be okay. Remove the
protective layer before heating. Since the protection will be gone, you need
to almost polish the edges of the cutout before dragging the lens past it.
I just finished doing that assembly myself so it is all fresh in mind.
Ed Moody II
Rayne, LA
601XL / wings
| Quote: | Listers - need some help again - on the Landing Lights.
The acrylic shield is approx. 280mm wide. The opening is 235mm wide.
The guide says slide it toward the rib and then slide it back toward
the riblet. I'm 95% sure that it is not physically possible to do
with the lens unit installed.
Do I not understand physics or do I lack Voodoo powers?
Also, related question - the shield is not quite flush with the nose
curve. Any reason I can't heat it a bit to make it fit?
|
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Jaybannist(at)cs.com
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| Posted: Thu Jun 22, 2006 4:30 am Post subject: Engineering or Voodoo? |
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Michael, My setup must be the same as yours, because I had to trim the side
edges of the lense, at angles, to get it lense into the opening. Mine does fit
the curvature of the wing leading edge, though. I have not made the final
installation because I want to be able to aim the lights after the wings are
attached to the fuselage. I am more than a little concerned about those sheet
metal screws that hold the lense in place. I'm hoping that Locktite will ease my
concern.
Jay in Dallas, XL, working on fuselage
Do not archive
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dredmoody(at)cox.net
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| Posted: Thu Jun 22, 2006 6:06 am Post subject: Engineering or Voodoo? |
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Guys, I too was insecure about the sheet metal screws holding the lens in place, particularly once they have been removed to replace or aim a bulb a few times.
I opted to use the aluminum strips but installed four K-1000-6 platenuts along the top and four along the bottom edge. I dimpled the skin then used a spin deburring tool to countersink the plastic lens. I used flush solid -3-4 rivets set with a squeezer to hold lens, aluminum backing strip, and platenuts together. I ordered some #6-32 stainless flathead screws from BoltDepot.com because they were available with an Allen socket head..... no stripped Phillips screws to gripe me.
With that arrangement, the lens can be placed and removed an ifinite number of times without any serious hassle. I also deleted the little nose "riblet" and replaced it with some standard angle facing aft instead. Now when the lens is removed, the opening serves as an access port to the inside of the wingtip. On the other wing, I'll make a conventional access port on the underside of the nose skin.
Ed Moody II
Rayne, LA
601XL / wings
---- Jaybannist(at)cs.com wrote:
| Quote: |
I am more than a little concerned about those sheet
|
| Quote: | metal screws that hold the lense in place. I'm hoping that Locktite will ease my
concern.
|
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