McHenry Forum - Crash Reconstruction & Simulation

You mention many of the types of items we have seen and are looking at and into. For example, Collision Speed may or may not be after significant decelerations have occurred (since which vehicle make/model/etc and what is the criteria for deciding it is 'in a collision'? I expect due to vehicle make...

Some additional information posted to the other forum in response to the question on the "2007 Reust reference** for the quoted " 8% - 18% " All of their vehicles are older GM models (compared to 2023). They range from 2002 to 2005, ACM’s have changed over that time. They further note...

In recent crash investigations with EDR pre-impact data and stability control monitoring data, we have found different speed results when we compare the speed of a vehicle based on the EDR reported pre-impact speed and the Speed calculated and/or simulated through applying the pre-impact recorded de...

Dec 2023: While posting a note on the Princess Diana Crash investigation we did for 48 Hours/CBS News, we referenced this post since for that tradgedy: Speed, Seat Belts & Drunk Driving were major causes of the deaths For additional information also see Effects of Speed on Accident Frequency Dr...

December 2023: We have recently been experiencing an uptick in interest in this topic. We now see why: Series 6 of The Crown which covers "Queen Elizabeth II reflects on her legacy and lineage as Diana dazzles the public in the final weeks of her life and the monarchy faces a reckoning." F...

Did it again!
4 hours to backup my 2 TB drive,
then swap out drives and now 4 TB!!
with cloud files more and more space required so just added more space!

clarified the original book Ray relied on when formulating HVOSM, SMAC, etc and checked when SAE adopted SAE coordinate conventions.

Question from another forum: Q: Does anyone have experience of a high speed ~90 -95 mph frontal impact in which the front seat occupants may have been already been in very close proximity to the steering wheel and/or dashboard when the airbags fired?. eg speed high enough to be fatal despite airbags...

Another important warning posted to the NAPARS Facebook page (thanks Wade): Right up there with ' don't put yer feet up on the dash! " From NHTSA comes a warning: Consumer Alert: Don’t Buy or Use Steering Wheel Decorative Emblem Decals Decals may detach in a crash and cause serious injury The N...

From INCR forum : Q: looking for any references on bicycle speed/velocity, specifically looking for child or 12 year old male A: See Accident Reconstruction Journal (ARJ) 26-4 If you join NAPARS you get access to all ARJs! for a summary article on the topic, for 11-13 year olds, it was 9.9mph (repor...