PC-CRASH Multi-body option IS the ATB program!

[MSI]

I don't know why PC-CRASH pretend their 3D "multi-body" model is something independently created when in reality it is the ATB program.

Quick comparison of the ATB program vs pc-crash Multi-body simulation
first note that ATB is:

ATB general purpose lumped mass program.png (29.78 KiB) Viewed 488 times

And here is a comparison of the models, look familiar?

ATB v pc-crash multibody.png (187.43 KiB) Viewed 488 times

Here are the references pc-crash provides about their multi-body option:

multibody references all.png (154.52 KiB) Viewed 173 times

• These are advanced classroom textbooks which do not address the the coding for use as a simulation program as if it might be easy work!
  • See What is ATB where we present and discuss the brilliant pioneering work by Dr. John Fleck which included extremely efficient integration routines for economical execution of the program and the addition of many extensions and refinements to move the mathematical model from 2 dimensions to 3 dimensions
  • For some reason they pretend it is NOT ATB. IT IS ATB! NOT applicable to individual crash reconstruction
    • For additional information see pc-crash multi-body option IS the ATB program
  These references are engineering series type references and not about any specific way pc-crash implemented theory and analysis into a working multi body simulation code. And the transformation of scientific equations and theories into computer code and integration routines is the brilliance of the work of Dr. John T. Fleck!
  
  Why won't pc-crash acknowledge the pioneering contribution of Calspan & the late Dr John Fleck in the creation of the ATB code and the use by pc-crash of ATB code as their "multi body" option??