In his heart, David Ullman is a designer. While much of his career was spent helping others learn how to design, he did find time to design products himself.
During the 1990s he founded, led, and designed products for BikeE Corp., the largest recumbent bicycle manufacturer in the world at that time. The "AT" model, shown on the right, was given awards as one of the best bicycles of the era. The tandem (below) was one of the most ridable two-person bikes produced. Over 30,000 of his bicycles were sold during BikeE's ten year life.
Now, nearly twenty years since BikeE ceased production, many BikeEs are still on the road and traded on Craigslist.
Currently, Ullman is consulting with a company designing a high-end electric tricycle. He is assisting the team with drive-train details, and supporting the design-for-assembly, design-for-manufacture and, human factors efforts.
Ullman has designed detailed scale models of early aircraft for the Model Expo company. These kits include laser cut wood, photoetched, and cast parts. Ullman developed and produced detailed plans for its construction. Model Expo has sold many thousands of each of these kits. Click on an image to go to the Model Expo site.
Ullman has also designed products in the health care, transit and wood products industries.
He is best known as a product design author and consultant. The Mechanical Design Process, a text on how to successfully approach design problems has been read by over 50,000 students and professionals. His papers on the fundamentals of design are widely cited, some with over 400 references. Links to his most cited work are found on the Technical Author page.