DC motor torque and power
A copy of my notes on DC motor torque and power can be downloaded at the link: http://synthetica.eng.uci.edu/mechanicaldesign101/McCarthyNotes-1.pdf
Entries by Prof. McCarthy
DC motor basics
The basic principles of DC motors are presented by Joe Wolfe of the University of New South Wales (Sydney, Australia) at the link: http://www.animations.physics.unsw.edu.au/jw/electricmotors.html Northwestern University (Chicago, Illinois) presents the basics of a DC motor in the Wiki page: http://hades.mech.northwestern.edu/index.php/Brushed_DC_Motor_Theory
Mechanical Properties of Steel
The MatWeb site provides detailed information about materials such as the tensile strength of various compositions of steel. For example the search “low carbon steel” results in the list of links to information: http://www.matweb.com/search/QuickText.aspx?SearchText=low%20carbon%20steel
Unified Numbering System for Materials
There are a variety of numbering systems for materials such as steel. The unified numbering system (UNS) uses a letter to designate a material category followed by five numbers constructed from the existing materials designations to coordinate all of these numbering systems. The unified numbering system (UNS) is described in Wikipedia at the link: Unified […]
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
Material Properties Charts
Cambridge University provides a useful overview of materials properties such as the chart below. The tutorial can be accessed at the link: http://www-g.eng.cam.ac.uk/125/now/mfs/tutorial/non_IE/charts.html
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 (archived) link: http://www.mechanicalspider.com/comparison.html. 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 […]
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:https://patents.google.com/patent/US6260862B1/en Wikipedia calls this the Klann linkage which is described here:http://en.wikipedia.org/wiki/Klann_Linkage
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: http://demonstrations.wolfram.com/ATheoJansenWalkingLinkage/ [vimeo]http://vimeo.com/1242383[/vimeo]
NIST 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