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Old Apr 28, 2009, 05:45 AM
More like crunchman....
dsman's Avatar
United Kingdom, Cheshire East
Joined Mar 2007
908 Posts
Question
Wingbolt crimping "cups"

Help please!

We're all familiar with the recessed 3-dimensional washer "cups" (I apologise for not knowing their proper description) fitted to moulded wings, enabling the wingbolt/s to be crimped up sufficiently & distribute the load/protect the underlying glass/carbon structure.

Does anyone know a source?

I have a carbon Destiny wing which lacks them (all my previous Dessies had them fitted), and oddly - given the general quality of construction - my carbon Bird wing also lacks them (perhaps explains why the well-bolted wing shifted forward slightly & cracked the forward lip on the fuz during a mild impact into soft ground: that lip has now been filed off!).

I'm based in UK.
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Old Apr 28, 2009, 08:03 AM
David Cairns
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Orange, CA
Joined Apr 2002
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Do you mean a Blind Nut?
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Old Apr 28, 2009, 08:34 AM
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Screw cups? More properly- "escutheons"?
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Old Apr 28, 2009, 08:47 AM
Embrace the suck
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Joined Nov 2004
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Tinnerman washers?


Nauga,
and his $15 bolts
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Old Apr 28, 2009, 04:03 PM
More like crunchman....
dsman's Avatar
United Kingdom, Cheshire East
Joined Mar 2007
908 Posts
Thanks, guys, for your contributions; though none so far appears to identify the little rascals.

Slopemeno - "escutheon/escutcheon" could be it, but a Google search suggests not.
dcairns - the "blind nut" would certainly do a decent job, but it isn't the receptacle found in most mouldie wings, which are cup shaped with sides almost reaching the wing surface.
nauga - "Tinnerman" washers, ditto above remarks on the blind nut.

Anyone able to identify them?
They must have a name & there must be a source.
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Old Apr 28, 2009, 04:35 PM
Biting ankles since '53
No Pants Island
Joined Feb 2007
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Plain metal washers sunk at the bottom of my Bird60 wings. Not cup washers though. And don't worry, no matter what you do that lip on the Bird fix goes on a heavy arrival.
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Old Apr 28, 2009, 05:21 PM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
2,314 Posts
Do you mean a washer that is quite thick with a counter sunk hole in the middle? Also machined into a domed profile? If so, don't know the name but they are occasionally used in the motorsport world to fasten body panels down. Try aerospace fastener suppliers or do you know anyone with a lathe?

S

PS last time I saw them was on a Group C Toyota so it's possible they had them machined 'cos their budget was 'sufficient'!
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Old Apr 28, 2009, 05:32 PM
Say when.....
quigley257's Avatar
United States, MO, Hillsboro
Joined Sep 2005
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Possibly Google "finishing washer"...?

--quigley
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Old Apr 28, 2009, 05:49 PM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
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Quote:
Originally Posted by quigley257
Possibly Google "finishing washer"...?

--quigley
The ones I had mind had a much larger outside diameter in relation to the hole through the middle and much flatter dome profile.

S
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Old Apr 28, 2009, 05:52 PM
Put in all the lead
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Devon, UK
Joined Dec 2003
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Are these what you're looking for Graham? Sorry had a helluva job trying to get a sensible picture of them with my cheap camera in poor light conditions.

Tim Avago put them in my carbon Sniper. I don't know what they are or where he got them from but he works for a metal fabricating / engineering company so maybe from there. I need to get some too but I won't get to talk to him for a couple of days. I suggest you e-mail him through this forum as he's not on here much at the moment. Otherwise I'll ask him on Thursday.

Steve
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Old Apr 28, 2009, 06:34 PM
More like crunchman....
dsman's Avatar
United Kingdom, Cheshire East
Joined Mar 2007
908 Posts
Thanks for that Steve - those flush units would appear to do the necessary & could well be an adequate substitute if I can't locate any of the recessed cup variety.

(BTW, Jools & I had a great 3 days in S.Wales, warm & sunny with rather more wind than forecast: Skirrid first day, Mickeys the second & Black Hill the third. Still to sample PYF)
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Old Apr 28, 2009, 08:08 PM
David Cairns
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Orange, CA
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Cone Washer?
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Old Apr 28, 2009, 08:13 PM
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I'd probably buy a brake line flaring tool from Kragen and make my own. I did get something similar from Orchard Supply called "compression inserts" (pn#9061045). They are made from brass and flared, so you'd end up with the equivalent of a countersunk area when you were done.
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Old Apr 28, 2009, 09:49 PM
find me @samotage
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Melbourne Australia
Joined Jul 2005
8,362 Posts
I usually just epoxy a normal "nut" with flocs to hold the thing in place.
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Old Apr 29, 2009, 01:31 AM
H.A.L. 9000
checkenbach's Avatar
Benicia Ca. USA
Joined Jan 2001
730 Posts
I call them wing bolt pylons.(He's talking about the piece that goes in the wing that the bolt cinches down on). Get some thick wall alumin(i)um tubing and get out the dremel, and epoxy and get to work.
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