Thank you Mark.
I was actually in the process of drawing up the WAF's in SolidWorks to 
illustrate the difference, but you nailed it right there.
Cheers.
Pete.

On 3/10/2010 13:30, Mark Langford wrote:
> Replacing the two bolts with one longer one and a spacer replaces two bolts
> in single shear (not the best) with one bolt in double shear, which is far
> better.  Although I knew it already,  I relearned that lesson when I checked
> my flaps after 930 hours and found the oilite bushings elongated and some
> slop in the flap...because I'd used two short pins in each hinge rather than
> one longer one (due to clearance reasons).  Simply replacing the two with
> one longer one eliminated the slop.  All the spacer does in between two WAF
> fittings is enable you to tighten the bolt up without pinching the WAF
> fittings together and breaking some wooden stuff.  I did the single bolt and
> spacer thing when I revamped my wing tips, added the gas tank, and put my
> WAFs in double shear.  I guess I should conjure up a picture to show the
> point...
>
> Mark Langford
> N56ML "at" hiwaay.net
> website at http://www.N56ML.com




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