Koenigsegg Door

Koenigsegg door system

The doors of the Koenigsegg CCX open using the “dihedral synchro-helix door actuation” system. You can see this movement on the video

Elastic Modulus v. Density

Material Properties Charts

Cambridge University provides a useful overview of materials properties such as the chart below.

Elastic Modulus v. Density

Elastic Modulus v. Density

The tutorial can be accessed at the link:

Jansen and Klann Legs

Comparison of Klann and Jansen leg linkages

Joseph Klann provides a useful comparison of the leg designs for his Mondo Spider and Theo Jansen’s Strandbeest at the link:

Mondo Spider

Mondo Spider walking machine

This walking machine known as the Mondo Spider.

 The leg of the mondo spider has the topology known as a Stephenson six-bar and is described in US Patent 6,260,862 awarded to Joseph Klann. Access it through the link:

Wikipedia calls this the Klann linkage described here:


Jansen Strandbeest

Theo Jansen’s walking machine

Theo Jansen builds amazing walking machines.
Each leg is an eight-bar linkage. The Wolfram Demonstration Project models this linkage in a Mathematica notebook. See the link:




Periodic Table

NIST Periodic Table

Periodic Table

Periodic Table

The National Institute of Standards and Technology provides an on-line periodic table. Access it and other information at the link:  Periodic Table

National Institute of Standards and Technology

National Institute of Standards and Technology

Prof. Britton's Notes on GD&T

Geometric Dimensioning and Tolerancing

This is a link to notes on Geometric Design and Tolerancing by Prof. Graeme Britton of Raffles Design Institute, Singapore.

Prof. Britton's Notes on GD&T

Prof. Britton\’s Notes on GD&T

A pdf version of Prof. Britton’s lecture is available at:

Here is another excellent set of notes from the Technical College of New Jersey on geometric dimensioning and tolerancing.

RV Linkage

Linkage for an RV deployable top

This design concept is an 8-bar linkage developed by Minshan Tsai and GimSong Soh for my advanced mechanisms class lifts the top of a recreational vehicle to create a second story, UCI Robotics and Automation Lab. It is on YouTube:

Dishwasher Linkage

Dishwasher linkage

This linkage to lift the lower rack in a dishwasher was developed by Marshall Meek in my advanced mechanisms course (UCI Robotics and Automation Lab) It is accessible on YouTube:

2009 Formula SAE CA

2009 Formula SAE California

Here is a link to a facebook album showing the racecars and teams at the 2009 Formula SAE California intercollegiate engineering racecar competition that occurred June 17-21, 2009 at the Auto Club Raceway, Fontana CA.


2009 Formula SAE CA

2009 Formula SAE CA