Hi Ferg,
Machine shop accuracy and composite construction just don't go together in
this area. You have to get six 1/2 inch bushes to all to line up perfectly
to get both pins in. The composite parts will move around with temp and
humidity changes so you will never get the pins in when "in the field". A
bit of slack is your friend on this occasion.
Regards
Brian Davies G-DDBD
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of
f.kyle@sympatico.ca
Sent: 25 June 2013 19:31
Subject: Europa-List: wing pins/sockets
I have written a challenge about a week ago regarding trying to
free a tapered pintle jammed in to the port wing bushing group. More on that
later.
However, in the process of building my Europa, we changed from
3/8inch wing pins to 1/2inch jobs. This invoved removing and replacing the
bushings - and I had a pin made (say 6inches long) which was 3/8inch for 3
inches and then 1/2inch for the remaining 3. This way, the bushings were
exchanged by tacking the spars together for spacing/siting.
I now have three potential wing pin forms, the 3/8-1/2 one, the
company-supplied starboard hand pin, and the company pip-pin model for the
port side. Call them A, B.and C. A measures 0.491", B is 0.496" and C is
0.498". in the port fuselage bushing, C is 'stickier' than either A or B -
but not by much. The measurements are pretty accurately done by three of us,
two licensed mechs and Yours Humbly..
AND YET. when these are presented to the spar bushings, they
rattle around like a whistle pea. I am not familiar with such freedom of
travel and beg to ask if this sounds usual.
afellow speculations gratefully received (Bud, say something)
Cheers, Ferg
P.S: The tapered pintle spree is soon to be released.
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