Search found 1788 matches

by MSI
Mon Oct 19, 2020 9:38 am
Forum: General Topics
Topic: A Needle(slap) in a Haystack...aka Stuck Speedometer Reliability
Replies: 5
Views: 9944

Re: A Needle(slap) in a Haystack...aka Stuck Speedometer Reliability

Oct 2020A: Postings on INCR included the following references: I preface this list with the conclusion from a reference above... In general, the practice of representing a residual speedometer reading as that vehicle’s speed at impact is strongly cautioned against. Speedometers and Collision Reconst...
by MSI
Fri Oct 16, 2020 1:29 pm
Forum: Vehicle Safety
Topic: Automatic Braking Seeing "Phantom" Objects
Replies: 0
Views: 4571

Automatic Braking Seeing "Phantom" Objects

Couple of articles on Automatic Braking and issues with "Phantom" braking, etc. When investigating a crash any influence or actions by any automatic steering or braking (if it is an option on either vehicle involved in the crash) must be investigated. Wired Magazine: Split-Second ‘Phantom’...
by MSI
Mon Oct 12, 2020 11:35 am
Forum: 3D Vehicle Simulation, msmac3D
Topic: What happens when a vehicle hits a pothole or rut at high speed?
Replies: 3
Views: 14559

Re: What happens when a vehicle hits a pothole or rut at high speed?

A query about potholes came up and so i did an initial review of the pothole paper (SAE 2015-01-1572) and unfortunately it does not include any full-scale tests (see Summary/Conclusion 5) and an important missing element is what shape/size might cause de-beading/air-out? The study does include an im...
by MSI
Wed Sep 30, 2020 2:20 pm
Forum: General Topics
Topic: 18% Restitution at 35 MPH??
Replies: 4
Views: 5206

18% Restitution at 35 MPH??

Sept 30 2022: this topic split off from related topic What is Restitution? (w/r to Vehicle Collisions) Sept 2020: As part of the NAPARS facebook page presentation Today: An NCAP Report, Part5, Restitution they included NHTSA Crash test #10156 which was a 2018 Chevrolet Traverse 4D SUV 35 MPH barrier...
by MSI
Wed Sep 30, 2020 1:28 pm
Forum: Simplified Momentum Analysis, PC-Crash, Virtual Crash
Topic: A Negative Coefficient of Restitution? An Irresponsible vCrash Video!
Replies: 0
Views: 7501

A Negative Coefficient of Restitution? An Irresponsible vCrash Video!

In a recent post on the NAPARS facebook page which was presenting what type of information is contained in NHTSA Crash test database reports they presented results from test #10156 which was a 2018 Chevrolet Traverse 4D SUV 35 MPH barrier crash. As part of the section on restitution (they have daily...
by MSI
Sat Sep 26, 2020 1:07 pm
Forum: General Topics
Topic: What is Restitution? (w/r to Vehicle Collisions)
Replies: 3
Views: 14271

Re: What is Restitution? (w/r to Vehicle Collisions)

This topic came up on the NAPARS facebook page so i added a couple other sources for the definition: Oxford Reference The coefficient of restitution always satisfies 0<=e<=1. When e=0, the balls remain in contact after the collision. When e=1, the collision is elastic: there is no loss of kinetic en...
by MSI
Thu Sep 24, 2020 9:45 am
Forum: 3D Vehicle Simulation, msmac3D
Topic: Pavement Shoulder Dropoff
Replies: 3
Views: 8514

Re: Pavement Shoulder Dropoff

Sept 2020 a couple references/links added
by MSI
Tue Sep 22, 2020 4:41 pm
Forum: McHenry News!
Topic: McHenry Software - Still Innovating After All These Years!
Replies: 2
Views: 6082

McHenry Software - Still Innovating After All These Years!

Recently a thread on INCR included some comments related to McHenry Software and small software companies in general. Below was our response: Thanks for the comment in the INCR REC-TEC topic (note INCR you have to be a member for that link to work) of 'McHenry is a name etched in the history of cras...
by MSI
Tue Sep 22, 2020 4:15 pm
Forum: Simplified Momentum Analysis, PC-Crash, Virtual Crash
Topic: Some Simplified Momentum Assumption Misconceptions
Replies: 6
Views: 22669

Re: Some Simplified Momentum Misconceptions

Sept 2020:Added to the first part of the thread a NOTE...see the first thread above for the NOTE