rparigor(at)suffolk.lib.n
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 Posted: Fri Oct 27, 2006 9:09 pm Post subject: Shoulder harness attachment to door frame? |
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Was looking tonight at the door frame, near the lift strut attach point as
a very nice spot to attach shoulder harness (aft side of frame).
Looks like a nice piece of 4130 chrome moly, .750" OD .083" wall bent into
a roll bar to follow the fuse door frame up and around, with a welded in
place 1/2" tapped insert for attachment would do the trick.
Weight of the metal is a few pounds (plus glass) for a roll bar that
begins just above the shoot bolts.
Seems Uni wrapped around the roll bar, lets say 3 ply 4 inches wide and
staggered 16", 17" , 18" long three times each side would get it pretty
good and stuck nestled against the rear door frame.
(can sneak between the Uni wrap around of 3/4" rollbar, 7/16 rigid Poly
wiring tube that will punch through top hat stiffener to get you into
ceiling panel area, foam can be used to make nice routing for Uni, then
Balsa cover to make for very nice transition for headliner from door frame
to fuse)
I will need to take another look, but think could just tap into the roll
bar for Lift Strut pivot ball attachment.
Anyone do this? Pictures?
Opinions?
Thx.
Ron Parigoris
Unscientific calculation:
200 pound person, lets say 2/3 weight can be on shoulder harness OK 132
pounds
Now lets say we want to tolerate 15 Gs, thats 1980 pounds
Without grinding numbers, lets say there will be 2000 pounds forward force
and 500 pounds downward force on rollbar. This is only 1 side.
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