hi iam making a chassis out of folded sheet but what rad on the sheet would i need to pass the sva. on the bender i have at work its a very tight bend. because where your sitting in the car the sheet folds up and over where your sitting to make the side frame like a double skin.
adam

quote:

---

Originally posted by oadamo
hi iam making a chassis out of folded sheet
adam

---

Depends what it's a sheet of

I believe the rad you need is 2.5mm, but check the SVA manual to be sure.

quote:

---

Originally posted by James

quote:

---

Originally posted by oadamo
hi iam making a chassis out of folded sheet
adam

---

Christ!

Really? Why?

After the problems Robin Hood have encountered/caused I'd steer well clear myself!



Maybe I'm just unimaginative!

cheers,
James

---

The problem is when using aluminium sheet as a monocoque. You need to really understand what you're doing to get good strength and avoid (as far as possible) work hardening.

The racing cars that use that kind of construction tend to get rebuilt every season or two, which isn't practical for a roadcar.

If using stainless steel (as quantum do) there are fewer problems with longevity, but they get heavy.

Congratulations to you for being different.

Good luck with the sheet construction.

Minumum Radius is 2.5mm on protruding and open elements that have a curved edge to them

I believe that is stated in the SVA book.

If I am wrong I am sorry

Agree with Designer on well done for being different!

One Robin Hood builder couldn't get his car through SVA. The examiner said it wasn't inherently strong enough. I can't remember the exact details.

It led to a huge (and as yet unresolved AFAIK) issue for all the Lightweight builders.

Cheers,
James

I seem to remember that the seat belt mounts were the issue, the chassis is mainly made from 16g(?) ally and although fairly strong overall, it had no single strong node points to attach the the belt mounts.