British Aerial Transport
The company was formed in 1917 by Samuel Waring around the combined knowledge of Frederick Koolhoven as Chief Designer, and Robert Noorduyn as Chief Draughtsman. Koolhoven's first design for the company was the F.K.22 fighter. In 1919 Lord Waring reduced his aviation interests and this forced the closure of the company. The fourth F.K.26 was the last aircraft built by the company.
- BAT F.K.22 (1918) Single-engine single-seat fighter aircraft
- BAT F.K.23 Bantam (1918) Single-engine single-seat fighter
- BAT F.K.24 Baboon (1918) Single-engine biplane training aircraft
- BAT Basilisk (F.K.25) (1918) Single-engined single-seat fighter aircraft
- BAT F.K.26 (1919) Single-engine four-passenger biplane transport aircraft
- BAT F.K.27 (1919) Two-seat single engine sporting biplane
- BAT F.K.28 Crow (1920) Single-engine single-seat ultralight aircraft
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). London: Orbis Publishing.
- Jackson, A.J. British Civil Aircraft Since 1919 Volume 1. London: Putnam, 1974. ISBN 0-370-10006-9.
-  Koolhoven aircraft.