AdrianH
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| posted on 1/4/13 at 02:09 PM |
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Help on rollbar backstays to MSA
Adding a diagonal to the roll bar and wondering what is the best way to proceed. The first picture shows the general setup I am trying to achieve.
 
backstays1
Now what I am trying to decide is do I shorten the diagonal so it is not interfering with the back-stay, or do I shape the back-stay to fit around
both tubes
 
backstays2
 
backstays3
Backstays. These are compulsory and must be attached near the roofline and near the top outer bends of the main rollbar on both sides of the car.
On the Diagonal. The upper end must join the main rollbar not further than 100mm from the junction of the backstay joint, or the backstay not more
than 100mm from its junction with the main rollbar.
One other action could be to make the diagonal butt against the backstay by cutting out a section of the diagonal.
Any advice?
Cheers
Adrian
[Edited on 1-4-13 by AdrianH]
Why do I have to make the tools to finish the job? More time then money.
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minitici
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| posted on 1/4/13 at 03:34 PM |
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The rear stays don't need to run parallel - you could angle them towards the corners.
Also the diagonal can also brace from a backstay foot to the main hoop corner if required.
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cerbera
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| posted on 1/4/13 at 03:51 PM |
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Not sure this will help, but this is how they were on my Stuart Taylor Loco.
 
Description
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renetom
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| posted on 1/4/13 at 05:21 PM |
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Hi
Doesnt the cross brace have to go
to top on the drivers side as per
cerbera ?
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AdrianH
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| posted on 1/4/13 at 05:44 PM |
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I think that the comment
On the Diagonal. The upper end must join the main rollbar not further than 100mm from the junction of the backstay joint, or the backstay not more
than 100mm from its junction with the main rollbar. so when the diagonal is on the downward side of the bend it would be out of the 4 inches.
If the top of the diagonal should be behind the driver or passenger side I am not shure.
The pictures in the blue book show passenger side. I have shortened the diagonal at present and will post a pic soon. i can put this either side at
present until welded up. So will send an email to the scrut.
Adrian
Why do I have to make the tools to finish the job? More time then money.
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AdrianH
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| posted on 1/4/13 at 07:04 PM |
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This is a picture of the revised layout with a shorter diagonal.
 
backstays4
On if the diagonal should be behind driver or passenger side there is a comment below drawing K6
which is
Note: Diagonal may be handed to left or right
Drawing No. 6
So I think it does not matter, I have still asked a question anyway.
Adrian
Why do I have to make the tools to finish the job? More time then money.
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AdrianH
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| posted on 3/4/13 at 08:29 AM |
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Drivers side is preferred but not mandatory!
Welded up thanks Joe
 
Welded
Adrian
Why do I have to make the tools to finish the job? More time then money.
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welderman
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| posted on 3/4/13 at 08:45 AM |
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Looking good there fella, no problem doing the welding.
You did all the hard work preping the tubes etc 
Thank's, Joe 
I don't stalk people
http://www.locostbuilders.co.uk/forum/23/viewthread.php?tid=172301
Back on with the Fisher Fury R1
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