MIME_QP_LONG_LINE
on 1/30/04 5:42 PM, Kenneth Gresham at kgresham@mtco.com wrote:
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> I am looking for suggestions for routing antenna cables (nav, comm, and
> transponder) and 12 volt wiring from aft of baggage bay. This is a tri-gear
> and I think I would prefer going through the center tunnel but I do not know
> what problems this may present. I am installing the finger brakes so there is
> access through the top front of tunnel just below the panel. Would a conduit
> bonded to the floor work? Do I need to separate antenna cables from other
> wires, if so, by how far? I need to bond on top of fuselage and want to do all
> steps possible with it off.
>
> Ken Gresham
> A268
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Ken,
I took a piece of 3" PVC slightly longer than the doorsill and quartered it
length wise so to make a mold to temporarily place under the doorsill from
the inside flange of the doorsill to the wall of the fuselage. Cut it in
half and place it from the rear to the middle, and one piece from the front
to the middle of the doorsill. This is important, as later you will need to
pull them out. I covered them in clear packaging tape and a little grease
before I placed them so as to act as a release agent. Then I made a 2 ply
tape on plastic the length of the doorsill as its called to do inside the
wing lay-ups. After scuffing the sill & wall with sandpaper, I place the
lay-ups on the PVC the whole length of the door seal over lapping onto the
wall and the door flange by at least 1 inch. After Its cured pull the PVC
out and you will have a nice strong doorsill with a tunnel to send all your
wires through. Not to mention it will be lighter than if the conduit stayed
in there. Plus it makes the doorsill stronger as well as less intrusive when
your arm is against it later when youre flying. Something I learned at
Flight Crafters. If its possible and you havent been there, go & take
pictures, or better yet, go and do some building there. It's great to see 10
or 20 other planes in stages in front of you.
Jeff
A258 Engine installed, still Fitting cowling with landing light.
Contemplating the perfect simple panel and engine monitoring system.
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