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W18 plate alignment problem

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asarangan(at)YAHOO.COM
Guest

Posted: Sat May 19, 2007 10:22 am Post subject: W18 plate alignment problem

While fitting the outrigger assembly to the outboard double-W18 plates

in the wing, I discovered that the fit was not very snug. It appears

that I might not have clamped the plates properly when I bonded the

W18's into the wing long time ago. The plates are not perfectly

parallel; the leading edge of the W18's are fine, but the trailing edge

is 1-2mm wider than necessary. If I bolt the outrigger assembly this

way, it may pull the W18 plates inwards and cause undue stress. The

thought of removing one of the W18 plates with a heat gun and

re-bonding did cross my mind, but that seems a bit extreme. Is there

anything wrong with shimming the gap with some aluminum sheets? Any

advice would be appreciated.

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fklein(at)orcasonline.com
Guest

Posted: Sun May 20, 2007 12:06 pm Post subject: W18 plate alignment problem

On Saturday, May 19, 2007, at 11:21  AM, Andrew Sarangan wrote:

 	  Quote: 	
		  

  outboard double-W18 plates in the wing...

  The plates are not perfectly parallel; the leading edge of the W18's 

 are fine, but the trailing edge is 1-2mm wider than necessary.


	


Andrew,



In case you have yet to determine how to address this, IMHO any 

reasonable solution should be focused on not generating bending 

stresses on any of the components (including the portion of W18 

embedded in the wing) when the bolts are tightened.



It would also be worthwhile to determine as best you can that the 

misalignment did not result in air bubbles within the W18 embedment  

and rib reinforcement.



I suspect we all have those occasions when we get to look at our 

personal standards; as I used to tell my staff, "we can only strive for 

perfection".



Fred

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