Entries by Prof. McCarthy

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: http://www.google.com/patents/about?id=70YHAAAAEBAJ&dq=6,260,862 Wikipedia calls this the Klann linkage described here: http://en.wikipedia.org/wiki/Klann_Linkage  

Geometric Dimensioning and Tolerancing

This is a link to notes on Geometric Design and Tolerancing by Prof. Graeme Britton of Raffles Design Institute, Singapore. A pdf version of Prof. Britton’s lecture is available at: http://synthetica.eng.uci.edu/mechanicaldesign101/GDandT.pdf Here is another excellent set of notes from the Technical College of New Jersey on geometric dimensioning and tolerancing.

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. http://www.facebook.com/album.php?aid=89098&id=92647534369

Machine screw dimensions

According to Shigley and Mischke’s Mechanical Engineering Design (McGraw-Hill 1989) experiments show that the tensile stress supported by a threaded rod equals that of a rod with diameter that is the mean of pitch and minor diameters of the threads.  Thus, the tensile stress area of a threaded fastener is computed from the average of its […]