Sorry I can't help much with the positioning - although
I'm sure there's something in the archives ....
One thought though - several builders have put the
2 supporting channels together, back to back, with a
spacer - makes it a bit easier to position the rails wherever
you want them ... like this = ].[
You need the spacer (it can be scrap alum.) to get proper
edge distance on the rivets for the rail which sits on top.
--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble08
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com
-------------------------------orig.-------------------------
On Tuesday 19 August 2008 22:54, bransom@dcsol.com wrote:
I've hit on the archives and MAM pretty heavily, and still am perplexed on
this subject...
It's difficult to reference MAM's Fig 12.15.1 channel layout as that
amounts to defining how it can't be right, at least if one wants to end up
with a floor channel under each of the 8 rows of seat rail rivets (2 seats
x 2 rails x 2 channels). The 10-5/8 dimension matches the outer edge
rivet rows for a pair of rails (on one seat), and that is almost all that
is certain from that figure.
One clue that seems reasonable is <a
href="http://mae.ucdavis.edu/ransom/Murphy/mi ... cement.jpg
">Figure 22.3.1</a> where MAM shows the outer rivet row of a seat rail
going straight into the outer-most floor channel, matched up with the
inside corner wrap. If the rails were placed in this way, we also get the
pilot's side 7-1/8" dimension called out in 12.15.1. Good. But if I were
to place the passenger side seat rail in the same way, it does not meet
the 6-1/8" dimension in 12.15.1. Furthermore, that 6-1/8" dimension would
require that the outermost row of rivets on right rail of the passenger
side be into the corner wrap.
My temptation is to just place the outside channels and rails so that the
outer edge of each outer rail, is directly over the outermost channel as
in Figure 22.3.1. Then place the other channels such that I match to be
under the rails in all other places. This doesn't give me the 6-1/8
dimension on the passenger side and I can't imagine that matters. I have
to wonder if I'm missing something -- I surely don't want to screw up such
that I don't leave room on the pilot's side for the aileron push-pull
tube.
If this puzzle makes sense to anyone, I'd really appreciate feedback.
Thanks,
-Ben/ 496R
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