McHenry Forum - Crash Reconstruction & Simulation

May 2024: moved 2nd post to first so guests can read

April 23, 2024 new version uploaded

minor updates added

Here are the redacted conclusions from our initial report to which the pc-crash expert wrote the aforementioned rebuttal report: and note line feeds added for readability SUMMARY AND CONCLUSIONS The PC-CRASH program includes a simplifying assumption of an instantaneous exchange of momentum. In real ...

WHY Use Simulation to “Test and Refine” Traditional Crash Reconstruction Results This topic is a follow-up on some other related topics: Should an Expert Rely Solely on PC-Crash for an Opinion? Simulation Analysis: Effects of Input Variations Classic Example of Sensitivity of Momentum Solutions The...

March 2024: Interesting coincidence. Earlier this year we were contacted by Chris Distin who's written a book on the movie with the stunt And the interesting coincidence: From the book a few items: The jump was filmed on the 1st of June 1974 , the 31st day of movie production. The patent had been a...

March 2024, Ray is 95 and healthy and doing great.

• Unfortunately in June 2023, Connie, his wife and my mother, passed away.
  • Constance McHenry Obituary

March 2024: edited updated and added the graphics

March 2024, added mention and link For restitution effects, please see Effects of Restitution on the Application of Crush Coefficients for details on effects of restitution, which "reduces the residual deformation while increasing the total impact speed change". In this forum topic, we foc...