We wanted a bit of flexibility in the frame and as weight was a problem, we had to do a box type system to get the strength.Dawie wrote: Tue Oct 20, 2020 10:49 am What type of steel was the frame made out of, normal mild steel?
So we used hot rolled mild semi HT steel with cold rolled boxing.
we could not use full HT steel as then we would have had to use rivets and could not weld it as it would get brittle and crack under stress.
Herman