Marcos Maniacs

Hal,
   Here is the scoop.
    We have no actual plans as it was thirty years ago and back then racing 
was far from scientific.
However here is what Roger remembers:
  The bar was a cockpit wide hoop mounted on the wooden frame immediately 
behind the driver and passenger seats. Two diagonal braces attached to the 
top of the hoop on either side slanting back and down to meet the frame just 
below the rear most part of the rear window. Two additional braces went from 
the rear pickup points back to the center point of the main hoop. There
was no forward brace. As my car is a steel frame I chose to reinforce the 
cross member where the seat belts are attached and mount the main hoop 
there. I have a single diagonal and two rear braces, plus a forward brace to 
the upright where the passenger door mounts..

I don't have any pictures here on this PC but will E mail you some when I 
get back to Atlanta on thursday.
I would suggest that you reinforce the area where you plan to mount the bar 
with steel angle to spread the load as much as possible. Many of the Bars 
you see on road cars are more for show than
effect so you may have to give up some esthetics for safety.

Garry


>From: Meggsief@....
>Reply-To: MarcosManiacs@yahoogroups.com
>To: MarcosManiacs@yahoogroups.com
>Subject: Re: [MarcosMaforce theniacs] Re:roll bar
>Date: Mon, 12 Jul 2004 23:31:52 EDT
>
>garry,
>          Have you been able to find the roll bar plans for my 66 vintage
>racer?
>   Hal
>5006