M. Adam Davis wrote: > That seems non trivial since you're actually tracking several > different variables, and it sounds like you don't know at least two of > them: > > What was hit > - dimensions > - deformation/hardness/malliability Yes, that's my conclusion so far. Even with assuming these, calculating how much energy goes into the tire and how much then into deforming the rim is IMO non-trivial... hence my hope I could fine a nice collection of pictures with descriptions to give me some feel for the range involved. Thanks for all your responses, Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist