McHenry Forum - Crash Reconstruction & Simulation

Be sure to also see the topic Momentum "Cone of Departure" Question which includes documentation of an impact between a Freightliner truck/trailer combination and a Chevrolet Silverado Pickup and includes a sideslap. The following is a video of that collision interaction: https://www.youtu...

The following is some additional information on the crash test between a tractor trailer and a pickup truck This was from an article published in Collision - Collision Magazine 5(2), Fall 2010 entitled Cone of Departure: A Good Idea, but NOT a Law In that publication they state A conservation of lin...

Some subject material from replies moved to other subjects to streamline information.
See posts above with related new links.

This Sept 2019 post moved from What is ECF to here The Brach book was updated to 2nd edition (edition 1 2005, edition 2 2011) Vehicle Accident Analysis and Reconstruction Methods, Second Edition R-397 We recently viewed a copy of 2nd edition and initially it appears no changes were made to items dis...

This Q&A moved from the ECF Thread to here: Q: In the ECF thread you mention "Looking at the Brach book Table 6.2, the listing for the RICSAC staged collision analysis, the value for MU for identical impacts varies arbitrarily" and also present values for RICSAC 9 from the book in Figu...

We moved the following Question and Full Response from the ECF thread since more related to Planar Impact Models: Q: In planar impact mechanics spreadsheet in the Brach book "Vehicle Accident Analysis and Reconstruction Methods" , there are PDOF angles, not correction factors. For example,...

Dug up some of the comparisons of Measured time histories v msmac3D
More refinement and discussion to follow

NOTE: DEC 16 2020: A question on the Momentum "Cone of Departure" came up and we had our response here but decided to split into a separate topic. We are doing an evaluation of a referenced full scale test between a tractor trailer and a pickup truck published in article in Collision - Co...

On another forum in a discussion of the 'cone of departure' referred to in momentum crash reconstructions there was a reference to a full scale test documented in SAE paper 2000-01-0464 . The following is additional information on that paper, the test and the crash reconstruction with sideslap! Here...

Dec 16, 2020 this Question, from another forum, was originally posted to Some Momentum Misconceptions , however once we saw a full scale test on the topic we spun if off to a separate topic. On our response to this thread ( see below ) we posted a video so why not bring it to the top, read through ...