Quote:
Originally Posted by Gandalf
Rodger - I hope that Krylon is the stuff from Walmart - they have theirs made from a special formula that makes it 3.75x stronger than the Krylon available off the shelf anywhere else LOL.
You guys are all bad-azz just for being able to HAVE these conversations and I apprecate you for being willing to have them in public. I always come away having learned something new.
Looking great guys! Keep it coming.
G
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Thanks Gregg - it's coming together.
One of the difficulties that seems to occur from time to time in forum conversations on the interweb is that (a) comments can be made without knowing all of the facts, (b) opinions can be presented as facts with minimal or partial support, and (c) it's difficult to know the tone of the intended commentary and replies. I guess that's why questions and answers always seems more palatable to me. These conversations are great but I always prefer to make sure that some background is given as well - and to that end...
The roll cage in this car is being built following the NASA Rally Sport rule set, which is founded in the FIA Article 253 Safety Equipment rule set. Both the NRS and the FIA rules are fundamentally the same but there are differences beyond the FIA's use of french and somewhat difficult to follow layout - the FIA rules call for CDM tubing only whereas most North American sanctioning bodies allow for (and provide specifications for) DOM. The FIA rules also specify dimensions in cm rather than inches (which don't always convert the same) and there are rules and specifications the FIA have in place that are not included in some other rule sets. Regardless of the differences, most sanctioning bodies pull their specification (and even diagrams) from the FIA rules and most sanctioning bodies will recognize approved roll cage designs from alternative bodies provided they are not fundamentally different. I chose the NRS rules because they are very clearly laid out, they exceed the NASA CCS minimum in most regards, and they are applicable to most of the events that I will be running. I know that I am comfortable using the NRS rules and we're building the cage out of DOM which is acceptable just about everywhere in North America but this means that the car would not be legal per FIA rules. I am, however, still following the FIA rules as a foundation.
These rules may not be the same as the rules that you will need to follow when you construct your car so I suggest that you follow the rule set that you need and, if you have specific questions regarding your cage design, that you consult the applicable sanctioning body directly.