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:
http://www-g.eng.cam.ac.uk/125/now/mfs/tutorial/non_IE/charts.html

Jansen and Klann Legs

Comparison of Klann and Jansen leg linkages

Joseph Klann provided a useful comparison of the leg designs for the Mondo Spider and Theo Jansen’s Strandbeest at this unfortunately dead link: http://www.mechanicalspider.com/comparison.html. I keep in here in case he brings it back.

Here is an excellent web page about the Klann and Jansen leg mechanisms, as well as other leg designs: Dog Feather Designs.

This article compares the leg designs:  Mechanical Spider Using Klann Mechanism

This is a youtube video prepared by William Thielicke that illustrates the two leg mechanisms.

Mondo Spider

Mondo Spider walking machine

This walking machine is known as the Mondo Spider. More information is available at Mondospider.com.

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:
http://www.google.com/patents/about?id=70YHAAAAEBAJ&dq=6,260,862

Wikipedia calls this the Klann linkage which is described here:
http://en.wikipedia.org/wiki/Klann_Linkage