Earth Day 2015

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My son John and his partner Roddy, who together form Change for Balance, filmed this video including the postscript which was filmed on-site in Africa.

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MechGen Suspension

MechGen Suspension

MechGen Suspension


MechGen Suspension is our latest iPad app. It is an ambitious design system for an independent suspension. The designer specifies the vehicle geometry, lower control arm, the wheel movement and camber gain. The system designs the upper control arm. If this is of interest, please contact me.

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UCI’s 2015 Race Team

UCI's 2015 Race Team

UCI’s 2015 Race Team


UCI’s 2015 race team at the Winter Design Review. On the left is Zeta an all-electric Formula SAE racecar that will compete at the UCI Energy Invitational, and on the right is Savage which is a combustion engine driven FSAE racecar that will compete at FSAE Lincoln in Nebraska

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Four-bar function generator: Open a door

Four-bar function generator

Four-bar function generator

Select this link, Four-bar linkages, for a Geogebra book that illustrates linkages ranging from a lever to a crank-rocker that open a door. This includes the construction of a four-bar linkage that coordinates the open and closed positions with specific input crank angles, called a four-bar function generator. The iPad application, MechGen FG, computes four-bar function generators for five coordinated values of the input and output cranks.

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