I have a glass fibre car with a rotten mild steel space frame chassis. Is it feasible to replace (partially replace) with your carbon fibre tubes and sections? I mean would they be strong enough. The main rust is in the main backbone chassis and the sections that come out along the sills. If i have a 1inch mild steel tube section what would i replace that with for same strength?

I would replace complete section for instance the whole backbone not just patch up the rusty bit.

Graham

If you dont have the engineering know how/experience to design a chassis and measure it to be safe, then you need to use either other designs you know to be sound structurally as the basis for your car or pay someone to do the design for you.

In most cases its easy to overengineer such things with some simple knowledge and experience, and with lightweight composites that is usually fine and still achieves what the guy wants.

The hard part is cutting things down to a minimum and designing your chassis to have the least weight and least material in certain places etc.  Get it wrong even a tiny bit and your chassis could fail at the worst moment.

But generally most of us arent in the game of getting 110% out of the materials.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant