Search found 757 matches

by MSI
Tue Jun 23, 2009 5:43 pm
Forum: msmac3D General Q&A
Topic: Questions on the CCI Option
Replies: 0
Views: 810

Questions on the CCI Option

Questions about the CCI option: CCI Question #1? I am reviewing a SMAC analysis which was run in McHenry and was wondering what the CCIX and CCIY variables represent? I am assuming it has something to do with the CG location but am not sure. If it does have to do with the CG I am not positive as to ...
by MSI
Mon Jun 22, 2009 4:08 pm
Forum: Collision & Trajectory Analysis
Topic: SMAC/HVOSM tire model analytical formulations
Replies: 2
Views: 162

SMAC/HVOSM tire model analytical formulations

Q: I am doing a study of the tire force models used in various vehicle dynamic simulation programs. The McHenry write-up on Cornering Stiffness from your accident reconstruction seminar sketches out the form of the m-smac tire model but does not give details. For example, how are the lateral stiffne...
by MSI
Mon Jun 22, 2009 3:29 pm
Forum: McHenry James Bond Spiral Jump
Topic: Question on McHenry James Bond Spiral Jump Stunt
Replies: 9
Views: 27731

Question on McHenry James Bond Spiral Jump Stunt

Q: I am wondering what is the accuracy of the statement about the stunt "With a 39.9 mph take-off speed, the weight of the Hornet being exactly 1460.6 kg (including passengers), and the distance between the klong ramps being exactly 15.86m apart, Bond perfectly executes the jump." A: The Spiral Jump...
by MSI
Mon Jun 22, 2009 3:21 pm
Forum: What Is?
Topic: What is the Lowest Speed for an injury?
Replies: 0
Views: 1919

What is the Lowest Speed for an injury?

Q: What is the lowest speed a vehicle could be traveling that would still be considered a high impact injury? A: Impact severity is generally based upon the impact speed change which is the time rate of change of the vehicle/occupant during a collision. There are many variables which go into the det...
by MSI
Sun Jun 21, 2009 10:05 pm
Forum: What Is?
Topic: What is the Calspan Driver study?
Replies: 0
Views: 1843

What is the Calspan Driver study?

in 1974 Rice and Del'Amico published a study entitled " An Experimental Study of Automobile Driver Characteristics and Capabilities " Calspan Report No. ZQ-5208-K-1. The study included approximately 100 drivers driving one or two test vehicles in five trails through a continuous course consisting of...
by MSI
Sun Jun 21, 2009 9:49 pm
Forum: What Is?
Topic: What is RICSAC?
Replies: 4
Views: 7584

What is RICSAC?

Research performed in the 1970's to “locate, review, decipher and place in useable form available experimental data on the structural crush properties of automobiles, and on the spinout trajectories produced by measured collision conditions” [1] revealed significant limitations in the available docu...
by MSI
Sun Jun 21, 2009 2:17 pm
Forum: What Is?
Topic: What is Validation for vehicle to vehicle collision models?
Replies: 1
Views: 2445

What is Validation for vehicle to vehicle collision models?

For vehicle to vehicle collisions methods validation, obviously cars are mass produced and so full scale tests can be performed from which validations of computer models can be ascertained ( RICSAC tests, etc). There was a group at SAE 15 years or so ago that I participated in which was trying to co...
by MSI
Sat Jun 20, 2009 2:47 pm
Forum: Collision & Trajectory Analysis
Topic: How does SMAC determine the DeltaV and PDOF?
Replies: 1
Views: 2645

How does SMAC determine the DeltaV and PDOF?

As part of our research for SAE paper 97-0961 RICSAC-97-A Reevaluation of the Reference Set of Full Scale Crash Tests, SAE Paper 97-0961" we included documentation of the techniques for determination of the DeltaV and PDOF in SMAC and how that compares to the DeltaV and PDOF measured in full-scale t...
by MSI
Sat Jun 20, 2009 2:01 pm
Forum: What Is?
Topic: What is the SMAC Inter-vehicle friction coefficient?
Replies: 1
Views: 1965

What is the SMAC Inter-vehicle friction coefficient?

Q: What range of values should be used in SMAC for inter-vehicle friction? A: From our SAE paper 970947 SMAC-97 : "The Inter-vehicle friction coefficient of the SMAC collision model ( AMU, SMAC input card 13, field 7 ) is based on coulomb friction. Coulomb friction is independent of the sliding velo...
by MSI
Fri Jun 19, 2009 11:43 am
Forum: What Is?
Topic: What is INCR?
Replies: 1
Views: 5438

What is INCR?

The INCR referred to in the link is the International Network of Collision Reconstructionists. I am a member and contributor to INCR. INCR is a newsgroup on Yahoo. https://groups.yahoo.com/neo/groups/INCR/info From the site: Description This is a by-invitation-only network of crash/accident reconstr...