bitsilly
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| posted on 30/12/06 at 03:14 PM |
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Me and Jon have been discussing our top mountings. I cannot see how they passed as they are a classic cantilever mount. The higher they are the more
leverage they have to snap, and this is more lightly the harder the bolts are.
I will add a triangular fillet to a bush running up the mounting bolt, as detailed above, for my own peace of mind as this would greatly spread and
change the nature of the loading. However for SVA it would be best to get rid of the cantilever bit IFF the resultantant line of the belt does not run
upwards to your shoulder or upwards to part of the seat not designed to take that type of loading. You can put in a seat that is intended to take the
seatbelt loading by having the necessary bracing but this is expensive and the chair will have to be examined as a solid part of the chassis! You
could also use inertia reel to reduce the number of problem points to one till after SVA!
Gardner Douglas weld in the bolts through their roll bar. On my Cobra I have had to weld on a whole new triangulated frame to pass the SVA.
If I was you I'd bite the bullet and properly triangulate the point with the same bar as the roll over bar. Whatever you do for the SVA, I would
not rely just those cantilevers. Good luck.
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Winston Todge
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| posted on 30/12/06 at 05:51 PM |
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Just my 2 pence worth...
I have Triton seats mounted directly to the chassis and have had to chop down the harness mounts considerably to slot the harnesses through without
fouling the holes in the seat... They look much 'stronger' now. Definitely a smaller moment around the welded area.
Anyway good luck Paul. Hope you pass on the retake! 
Chris.
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bitsilly
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| posted on 1/1/07 at 08:29 AM |
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Could you just clarify, is the 'bar' which needs triangulating the cross bar of the chassis or the bar the mounting bolt runs through?
Cheers
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chockymonster
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| posted on 1/1/07 at 07:04 PM |
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quote:
Originally posted by bitsilly
Could you just clarify, is the 'bar' which needs triangulating the cross bar of the chassis or the bar the mounting bolt runs through?
Cheers
It's not the bar but the mounts that I've been told I need to strengthen
PLEASE NOTE - Responses on Forum Threads may contain Sarcasm and may not be suitable for the hard of Thinking.
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bitsilly
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| posted on 2/1/07 at 12:03 PM |
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Looking at the mounting you fabricated and bent around the roll bar (the one you have the other mild bars bolted to).
I had an off road racer fully FIA approved, which had both top harness points bolted to a single bracket like yours. It had to be welded onto the roll
over bar and was obviously much beefier. Do away with the other mounts completely, or keep for after SVA.
I can get a link to the SVA guide if it helps (the one the government sells).
These photos don't show much I'm afraid but hey-ho!
http://bus-wad.sihe.ac.uk/gorc4x4/images/trials/res%20Feb%2005/pages/res21.htm
http://bus-wad.sihe.ac.uk/gorc4x4/images/trials/res%20Feb%2005/pages/res34.htm
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bitsilly
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| posted on 2/1/07 at 12:10 PM |
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Heres the link to the VOSA guide but it charges a contribution of £1.24 now
http://hotrodphotos.co.uk/SVA.htm
Best of luck
Ed
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Dillinger1977
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| posted on 5/1/07 at 08:54 AM |
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i might be wrong but ive just been to have a look at the mounts on mine and they seem a bit shorter than some of the ones in photos here. (mine are
about 30mm high)
is it my eyes playing tricks, or were they a bit shorter on earlier chassis' Marc?
if so, I might not have as much as an issue as people with higher ones. Also, it looks like i've got the option of shortening them further
still if needs be. I'll just see what the inspector says and would advise.
-Rog
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Agriv8
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| posted on 5/1/07 at 09:05 AM |
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Rog I would think yours are on the shorter ones ( same as mine ) they are also attached to the chassis sligtly diferently Shouldnt be any problems
unless you are getting SVA'ed at southhampton 
regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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