[1] The prototype was built in the 1990s and exhibited it at PFA (now LAA) airshows.
Although Diesel Air engines have been fitted to an AT-10 airship and to a Luscombe 8A monoplane, [2] production numbers have been very limited.
[citation needed] The Dair 100 engine is a twin-cylinder two-stroke, opposed-piston, 1,810 cc (110.5 cu in) displacement, liquid-cooled, diesel engine direct drive design.
In this "one-direction (uniflow)" engine these ports, respectively, admit air and expel exhaust gases.
[3] The engine may use either diesel fuel (DERV) or Jet-A1 kerosene (AVTUR).