THE SEATTLE MONORAIL CRASH!
A Study in Murphy's Law and Reverse Engineering!
On Saturday November 26, 2005 the Seattle Monorail
cars collided, yes, the monorail cars collided. The story is when they were
installing the tracks they allowed them to come together without the
clearance necessary to pass, this was done to allow for the loading ramps to
extend to the outer car. For 40 years they made sure the trains would never
run at the same time. But one driver decided to leave early and the rest is
history. We as engineering professionals know “It’s all about Murphy’s Law”.
Since we didn’t have the door drawings we also had
to do an extensive physical study of the doors. We disassembled one of the
doors and I took the parts and started to work. There was a complex
mechanical interface between the doors and the cars. The doors are operated
by a pneumatic system. I created most of the components of the door in
IRONCAD to start the mechanical
design. Reverse engineering is basically two steps. First you create the
basic configuration. Then you make sure the parts fit and provide the
functionality and look for ways to enhance the original design, after all it
was designed over 40 years ago.
For more information on TECH-NET and our Products:
Please visit our newsletter series:
We sell and support IronCAD and ZW3D Products and provide engineering services throughout the USA and Canada!
Take a look at IronCAD Compose! You can read most popular CAD native files directly for review and virtually any kind of communication.
More than a viewer - It configures, communicates and collaborates.
IronCAD Compose Pro!
Adds the ability to read and utilize date from all the standard format plus Pro/E, NX, Catia 4/5, Solidworks and Inventor.
Truly the most useful tool and best value in the CAD market place.
Thousand less than mid range or high end programs.
Unmatched ease of use!
Import of PRO/E, UG Siemens, Solidworks and Autodesk Inventor.
Import and export Catia 5.
Note: Catia 4 import and export included in Standard IRONCAD/INOVATE.
IRONCAD and INOVATE import/export all of the standard formats plus Catia 4.
Try a 30 day fully functional evaluation of IRONCAD or INOVATE and start playing and enjoying how CAD design can be fast and fun.
All include ability to read Creo (Pro/E), NX, Solid Edge, Solidworks and Inventor
Adds Advanced Surfacing, Sheet Metal and Reverse Engineering
ZW3D Standard plus Mold/Die
ZW3D Professional plus Associative CNC
ZW3D 2 Axis CNC (Includes ZW3D Lite)
ZW3D 3 Axis CNC (Includes ZW3D Lite)
5 Axis Option
See a Comparison Chart