On a quadcycle built for four

Sept. 13, 2007
Steven Morgenstern's first human-powered vehicle (HPV) now appears in bicycle shows and kinetic-sculpture events across the country.

But Morgernstern, chief engineer at R. Mathews Optical Works Inc., Poulsbo, Wash., has plans for a second-generation model. He uses VX CAD/CAM on the job and in his avocation, which is designing HPVs. The new bike seats four and has articulated steering, a 21-speed drivetrain, and hydraulic disc brakes. The structure is all aluminum, and each wheel is made from two spun-aluminum saucers mated to a single rim. The vehicle was designed to operate in mud, sand, and water.

 

Steven Morgenstern's first-generation human-powered vehicle.

Sponsored Recommendations

Aug. 22, 2025
Discover how to meet growing customer demands for custom products without overextending your engineering team. Learn how scaling your automation strategy can help you win more...
Aug. 22, 2025
Join industry leaders to explore how cutting edge digital technologies are transforming factories. Learn how to boost throughput, enhance flexibility, and accelerate your digital...
Aug. 22, 2025
Explore the future of manufacturing. Learn how to leverage the latest digital technologies and strategies to build a more efficient, agile, and resilient digital factory.
Aug. 21, 2025
A look into the latest improvements in motion control through high-performance drives, AI enhancements, and faster communication protocols.

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!