Pete and Bob
Had the same kind of idea. Putting a slotted tube bored for the pins
and use flush riveted nutplates in the tube with bolts to clamp the
tubes together. Install by sliding in the nutplated tube and aligning
the holes. However, that still will distort the tubes when the bolts
are turned down making removal almost impossible as in tapered pins. My
other idea was an expanding bolt. A 1/4 inch bolt with a steel insert
in the center and two bronze bushings at the ends so that as the bolt is
tightened, the bronze expands like a rivet and fills the small gap,
making it tight. My A&P said, why not just rivet it in place. Just
change the stab to allow it to rotate a full 90 degrees to allow
riveting.
However, what we have works, is maintainable and can be assembled by
amateurs using drift pins and bolts (which allow a loose fit) during
assembly and allows for a solid install provided the holes and pins are
correctly sized for zero clearance.
Good ideas though,
Bud
----- Original Message -----
From: Pete<mailto:peterz@zutrasoft.com>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Sunday, October 14, 2012 5:51 PM
Subject: Re: Europa-List: Re: Mod 73
Thinking out loud here, what about very accurately machining
substantive internal bolt bushings (made of a material to not cause
galvanic corrosion), tap them all the way down the tube to their proper
location, then bolt tight the two tubes without fear of distortion?
Just throwing it out there,
Cheers,
Pete
On Oct 14, 2012, at 4:47 PM, "Bob Harrison"
<ptag.dev@tiscali.co.uk<mailto:ptag.dev@tiscali.co.uk>> wrote:
You could drill and thread the heads of the parallel pins and use a
bolt to Jack the out if needed.
Regards
Bob Harrison G-PTAG
From:
owner-europa-list-server@matronics.com<mailto:owner-europa-list-server@ma
tronics.com> [mailto:owner-europa-list-server@matronics.com] On Behalf
Of GRAHAM SINGLETON
Sent: 14 October 2012 18:14
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Subject: Re: Europa-List: Re: Mod 73
No, they would distort the torque tube which must be perfectly
circular
Graham
-------------------------------------------------------------------------
---
From: Pete <peterz@zutrasoft.com<mailto:peterz@zutrasoft.com>>
To: "europa-list@matronics.com<mailto:europa-list@matronics.com>"
<europa-list@matronics.com<mailto:europa-list@matronics.com>>
Sent: Sunday, 14 October 2012, 14:04
Subject: Re: Europa-List: Re: Mod 73
I fully understand the requirement for an interference pin fit to
avoid the hammering out of the holes over time.
That said, could "taper pins" be used?
cheers,
Pete
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