We decided on a target deflection rate of 1 degree at 1200 lbs-ft of torque. Just how did we decide that? Well, it isn’t very scientific. I looked at the internet. Thank you Mr Google! Modern race cars have incredible rates of around 15, 000 lbs-ft per degree, but for a good strong braced ladder frame the value of 1 degree at 1200 lbs-ft kept popping up. So that was our target.
However, in the previous version of this blog entry I asked if anyone had other values. Well, Ken H, a well known chassis builder, gave me a valuable hunk of information – the original chassis was capable of 3500 n.m /degree (roughly 2500 lb-ft/degree). That is amazing considering what the original chassis is made of. Anyway we should at least match the resistance of the original chassis.
We also debated a scheme for testing torsional resistance and I started to put something down in this blog entry. However Ken H also sent us a link to some photos to show how testing should really be done. So, I have decided to remove all of our ramblings from this entry as, although interesting from a thought experiment point of view, they were not quite on the right track.
So thank you for the valuable input Ken.
We are now rethinking our strategy.