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Learning how to build Lotus Seven replicas...together!
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PostPosted: Wed Feb 22, 2012 10:41 pm 
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Joined: Tue Jan 31, 2012 12:49 pm
Posts: 1022
Location: Raleigh-Durham NC
I've seen several builders lament that, if they had it to do all over again, they'd build their roll cage first. However, building a roll cage, or even a roll tube, without either plans or a chassis, seems to be a losing proposition. And, I don't have a tube bender in my budget, which means that I might have to contact a local person to bend up the hoop / cage (I'm moving to NASCAR team country, so perhaps someone knows how to do that).

What would be really great is if someone-who-does-CAD, who knows SCCA regs (yeah, I know, I know), would have some basic plans for roll cages / roll hoops for the most popular designs (book, McSoreley, etc). Has anyone done that? I realize that no one wants to take liability in case the design doesn't work, but can't we at least have something besides a few pictures?

Thanks!

Tim


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PostPosted: Thu Feb 23, 2012 9:59 am 
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Joined: Thu Jul 17, 2008 9:11 am
Posts: 2998
Location: West Chicago,IL
Purchase a 5 tube rollbar and add to it from Kinetics:
http://www.kineticvehicles.com/parts.html
http://locostusa.com/forums/viewtopic.php?f=23&t=12684

Or purchase your own full design from Jimmy at RollCageComponents.com . Just give them a drawing of what your car needs. A few of us have purchased our roll bars this way.
http://www.locostusa.com/forums/viewtopic.php?f=19&t=6352&p=72079&hilit=roll+bar+jimmy#p72079
http://www.locostusa.com/forums/viewtopic.php?f=35&t=4145&p=72061&hilit=roll+bar+jimmy#p72061

Every Locost chassis is different as are the desires of the builder. If you want a full cage, you'll either have to design it yourself or hand off the chassis to an experienced frame builder. The basic plans are in the appendix of most major racing organizations. The requirements may change depending on your intended use/class. I did the hand-off process on an older Formula Vee chassis to get it into current compliance.

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Chuck.

“Any suspension will work if you don’t let it.” - Colin Chapman

Check out my rotary build log: click here


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