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f.kyle(at)sympatico.ca
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 Posted: Tue Jun 25, 2013 10:31 am Post subject: wing pins/sockets |
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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.
[quote][b]
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Gilles.Thesee(at)ac-greno
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| Posted: Wed Jun 26, 2013 3:08 am Post subject: wing pins/sockets |
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f.kyle(at)sympatico.ca a écrit :
| Quote: |
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.
|
Hi Fergus,
Not sure this can apply to the Europa, but in several aircraft I know of
the pins are machined oversize and then the wing spar bushings are
reamed in place to ensure correct fit.
Best regards,
--
Gilles
http://contrails.free.fr
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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brian.davies(at)clara.co.
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| Posted: Wed Jun 26, 2013 3:41 am Post subject: wing pins/sockets |
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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(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of f.kyle(at)sympatico.ca
Sent: 25 June 2013 19:31
To: 5EUROPALIST
Subject: 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. | Quote: | | http://www.matronics.com/Navigator?Europa-List |
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[quote][b]
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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