Rudy built this direct current dynamo, which delivers 9 amps at 10 volts. The field coil is shunt wound so that the dynamo is self-exciting. The dynamo was entirely fabricated without castings. It has an output of 90 watts at 2250 rpm. Rudy made special mountings to wind the field and armature coils on his lathe.

One of the first large donations to the Miniature Engineering Craftsmanship Museum was the collection of famed model engine builder Rudy Kouhoupt. After retiring as a chemist, Rudy had a second career building engines and writing magazine articles documenting the process. Many people have built his models, but we have the honor of displaying all of his original prototypes. Rudy’s collection includes scale model engines, locomotives, tractors and more. Additionally, thirteen of Rudy’s model steam engines are hooked up to run on compressed air to demonstrate their function.

Exhibit added: December 1, 2023 - Last modified: January 29, 2024

Presented by The Joe Martin Foundation for Exceptional Craftsmanship