Search found 1789 matches

by MSI
Sat Dec 16, 2023 12:27 pm
Forum: Vehicle Safety
Topic: Is a Telsa "Recall' an Actual Recall? or Merely a Software Update?
Replies: 0
Views: 2897

Is a Telsa "Recall' an Actual Recall? or Merely a Software Update?

Drives me crazy when they talk of safety 'Recalls' of Telsa. Tesla issues massive recall of more than 2 million vehicles over autopilot safety concerns Tesla’s largest recall won’t fix Autopilot safety issues, experts say It even has topped the lists of many: The Biggest Car Recalls in History, Upda...
by MSI
Fri Dec 15, 2023 9:52 am
Forum: Specs, Crash Tests, Etc.
Topic: Motorcycle Downshift Acceleration Studies
Replies: 0
Views: 4145

Motorcycle Downshift Acceleration Studies

Question on another forum brought up this article SAE 2020-01-0880 , Quantifying Engine Braking for Various Common Street Motorcycles by Jansen, LeBlanc, Wilhelm, Shaw, et al. _________ ABSTRACT Motorcycle engine braking was measured in each forward gear for a cross-section of typical street motorcy...
by MSI
Wed Dec 13, 2023 12:12 pm
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

Added some comments, links, etc to several of the posts
NOTE: since this is the 11th post, use the icon in lower right of the screen to go to other postings on this topic
11 posts.png
11 posts.png (10.95 KiB) Viewed 6 times
by MSI
Tue Dec 12, 2023 9:30 am
Forum: EDR CDR Related Topics
Topic: 109 MPH Crash, Collision Magazine Article, msmac3D Recon
Replies: 9
Views: 17230

Re: 109 MPH Crash, Collision Magazine Article, msmac3D Recon

Moved a link to the DRAFT copy of the article to the first post for folks who don't register...
by MSI
Mon Dec 11, 2023 8:01 am
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

Figure, comments and references added to prior posting from SAE 2016-01-1497 paper.
by MSI
Sun Dec 10, 2023 10:53 am
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

Another response was posted to the other forum i will summarize here and provide my answer: Q: Just to throw in an example the vehicle had speeds reported every 0.1 seconds. The collision was on wet roads, so realistically we are probably looking at values of mu no higher than 0.8 g. The last few re...
by MSI
Sun Dec 10, 2023 10:36 am
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

Look forward to evaluating that, if possible. First question: where did the speedometer data come from? a video? was this a full scale test? and/or why no EDR data? and how did you synch the speedometer with the ADR data? Second question/observation: location, location, location! In the picture it a...
by MSI
Sat Dec 09, 2023 11:41 am
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

When you mention ADR (Accident Data Recorder), i'm not sure what you mean? Do you mean the accelerations of the crash from airbag module data and then integrating to get the impact speed change and then when combined with the other vehicle (unless into a wall) get the impact velocity? Could you prov...
by MSI
Fri Dec 08, 2023 4:20 pm
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

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...
by MSI
Fri Dec 08, 2023 9:42 am
Forum: EDR CDR Related Topics
Topic: Effects of Vehicle Braking on EDR Pre-Impact Speed
Replies: 10
Views: 21781

Re: Effects of Vehicle Braking on EDR Pre-Impact Speed

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...