Skip to content

Posts Tagged ‘Testing’

Whirlwind’s Handcycle Tricycle Development and Testing

Many types of hand-powered tricycles are used by people with disabilities around the world, from lightweight sports handcycles for racing and recreation to rolling stores to cargo trikes loaded with merchandise. Whirlwind is applying our experience with wheelchair propulsion, ergonomics, and manufacturing to the development of a cargo handcycle that can be efficiently produced at…

Read More

Ralf Testing Tire

Whirlwind Founder and Chief Engineer Ralf Hotchkiss spent most of the summer in Chinandega, Nicaragua working on, among other things, the “thorny” issue of flat-free tires. Above is a photo of Ralf at work. When traveling, Ralf rides a standard RoughRider off the assembly line and interacts with a diverse group of people with disabilities…

Read More

Example of ISO Standard Tests

A Whirlwind II wheelchair, shown in the photograph, was built by a factory in Quang Ngai, Vietnam. It was first subjected to the tests described in “Simplified Strength Testing of Manual Wheelchairs in Developing Countries.” A few minor strength problems were identified and corrected.  The chair was then submitted to the VA Pittsburgh Healthcare System…

Read More