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1. 01:01 PM - Re: RV7-List Digest: 3 Msgs - 02/15/10 (John Russo)
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| Subject: | Re: RV7-List Digest: 3 Msgs - 02/15/10 |
Regarding the W-818 Pushrod Assembly, there was a thread whether or not this
could be weleded on Vansairforce a while back. Lots of good info in here,
some people are pro, some are con.
http://www.vansairforce.com/community/showthread.php?t=25581&highlight=welded+pushrods
On Mon, Feb 15, 2010 at 11:58 PM, RV7-List Digest Server <
rv7-list@matronics.com> wrote:
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> RV7-List Digest Archive
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> Total Messages Posted Mon 02/15/10: 3
> ----------------------------------------------------------
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> Today's Message Index:
> ----------------------
>
> 1. 07:56 AM - Subject: W-818 Pushrod Assembly (David Stuebner)
> 2. 10:04 AM - RV-7 F-7114 L and R fit (David Stuebner)
> 3. 09:52 PM - Re: RV-7 F-7114 L and R fit (Joseph F. Giallo, II)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 07:56:29 AM PST US
> From: "David Stuebner" <david.stuebner@earthlink.net>
> Subject: Subject: RV7-List: W-818 Pushrod Assembly
>
>
> Tom,
> I wouldn't be a conservative as the others. The plans call out the option
> for welding, so it is an acceptable method of joining he pieces. I would
> expect that if you told a competent welder what the materials are he/she
> would pick an appropriate filler material and weld prep procedure. The
> bead
> doesn't have to be flush, so he/she may not even bevel the egdes. As for
> the existing holes, I definitly wouldn't worry about the hole in the end
> fitting. It's designed to have holes in it. And I wouldn't worry about two
> 1/8" holes in the tubing, except one of the goals is to seal the tube up as
> best as possible. So, I would rotate the fitting 90degrees and have the
> welder fill in the tubing holes. The one drawback to welding is it burns
> the primer off the inside. Trade-offs.
> And yes, a quick call or email to Van's to confirm won't hurt.
> Dave
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 10:04:18 AM PST US
> From: "David Stuebner" <david.stuebner@earthlink.net>
> Subject: RV7-List: RV-7 F-7114 L and R fit
>
>
> Anyone building a -7 have problems with the spar bolt hole locations in the
> F-7114 gussets? I am having trouble getting bolts to go through the
> center
> section and then through the gusset holes. I know the bolts are close
> tolerance, but.... I can rationalize that the close tolerance is needed for
> the heavy spar end and the heavy components of the center section. Do you
> think I can open up the holes in the gussets a bit?
> Dave
>
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 09:52:06 PM PST US
> From: "Joseph F. Giallo, II" <jgiallo@mindspring.com>
> Subject: Re: RV7-List: RV-7 F-7114 L and R fit
>
>
> Dave,
>
> This is a known problem - fortunately solvable. Van's will tell you that
> the affected components are match drilled, unfortunately the assembly is
> what counts and mis-alignments creep in to their assembly processes. I
> had special endmills made that fit inside the holes (both sizes) and
> would only cut on the end rather than the sides - thus clearing the
> interference without damaging the precision holes. If your misalignment
> is slight it may be possible to clear using a machinists scraper in a
> careful way. If you can't make this work send me your address off-list
> and I'll send you the endmills. Make sure to check both sides of the
> fuse spar as well as the wing inserts - I found issues in both (yes it
> is a quickbuild). The most difficult part of the repair was aligning the
> spar holes once the interference was cleared - I had some expert help
> from Van's east coast representative to unrivet the forward portion of
> the spar within the fuse, the wings were then plugged in and
> pseudo-precision pins (also available if you need them) inserted to
> align the parts. The spar was then re-riveted to hold the (now correct)
> alignment. Hope this last step isn't necessary in your case but I
> mention it as it does happen (mine is not the only case.....)
>
> Regards,
>
> Joe
> N813MJ 80hrs
>
> David Stuebner wrote:
>
> > <david.stuebner@earthlink.net>
> >
> > Anyone building a -7 have problems with the spar bolt hole locations
> > in the F-7114 gussets? I am having trouble getting bolts to go
> > through the center section and then through the gusset holes. I know
> > the bolts are close tolerance, but.... I can rationalize that the
> > close tolerance is needed for the heavy spar end and the heavy
> > components of the center section. Do you think I can open up the holes
> > in the gussets a bit?
> > Dave
> >
> >
>
>
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