The Inventive Mind

Frederick Kirsten 鈥 1915-1951

I am a research man.
Frederick Kirsten
Fredrick Kristen explaining one of his inventions. (aa.washington.edu)

Fredrick Kristen explaining one of his inventions. (aa.washington.edu)

Frederick Kurt Kirsten was one of the founders of the 91探花Department of Aeronautics. He earned the first patent awarded to a 91探花faculty member. He was the public face of 91探花engineering for three decades, tirelessly promoting technology as the future鈥檚 greatest hope.

Born in Germany, Kirsten graduated from the 91探花in 1909 with a bachelor鈥檚 degree in electrical engineering. He was immediately hired by an industrial firm and by 1913, was supervising construction of the underground electrical service at MIT. Recruited back to UW, he agreed in 1920 to teach the entire curriculum of the new Department of Aeronautics: aerodynamics, airplane design, and propulsion.

On December 1, 1921, Kirsten filed the first patent awarded to a member of the 91探花faculty. He and William Boeing went into business together as the Kirsten-Boeing Engineering Company to develop Kirsten鈥檚 invention – the cycloidal propeller, first for aircraft and then for boats. He obtained a $290,000 grant from the Guggenheim Foundation to build the 91探花aeronautical engineering laboratory in 1926, and led the campaign to finance a state-of-the-art wind tunnel in 1936.

Kristen Wind Tunnel - February 1939

Kristen Wind Tunnel - February 1939

The team lowers an experimental Kirsten cycloidal propeller boat for testing. (Kirsten Collection. University Archives. Special Collections,  91探花Libraries)

The team lowers an experimental Kirsten cycloidal propeller boat for testing. (Kirsten Collection. University Archives. Special Collections, 91探花Libraries)

Kirsten was confident and stubborn; his designs were based more on trial and error than on analysis. Endlessly inventive, he never gave up the quixotic effort to perfect the cycloidal propeller, and patented more than two dozen other inventions, including the Kirsten pipe, air-raid sirens, fire extinguishers, neon lights, and air cleaners.

Kirsten and one of his many inventions
Time MagazineAugust 5th, 1940
Kristen and one of his many inventions (Time Magazine, August 5th, 1940)

Further Reading


  • Journalist Don Duncan wrote this 1971 review of Kirsten鈥檚 productive and busy professional life.
    Seattle Times

  • A journalist interviewed Kirsten in 1922 for this article concerning applications of the cycloidal propeller to flight.
    Popular Science

  • 1936 91探花press release enthusiastically announces Kirsten鈥檚 new wind tunnel, and his research on new propeller designs.
    Kirsten Collection, University Archives, Special Collections, 91探花Libraries

  • One of Kirsten鈥檚 commercial ventures was development for sale of the 鈥淗i-Tensity鈥 neon lamp, 7/1935
    Seattle Times

  • Visiting professor Mark Levinson wrote this biography of Frederick Kirsten in 1992.
    Kirsten Collection, University Archives, Special Collections, 91探花Libraries

  • Kirsten鈥檚 most successful invention was this pipe, which he patented and developed for production.
    Kirsten Collection, University Archives, Special Collections, 91探花Libraries

  • Frederick Kirsten spent decades working through applications or this patent for a cycloidal propeller – in aircraft and in boats and ships.
    Kirsten Collection, University Archives, Special Collections, 91探花Libraries

  • Frederick Kirsten was endlessly inventive, and this 1940 article in Time
    magazine describes three of his pre-war inventions.
    Kirsten Collection, University Archives, Special Collections, 91探花Libraries

Additional Resources