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Diesel Air Dair 100

The Diesel Air Dair 100 is an opposed-piston aircraft diesel engine, designed and produced by Diesel Air Ltd of Olney, Buckinghamshire for use in airships, home-built kit planes and light aircraft. The prototype was built in the 1990s and exhibited at PFA airshows. Although Diesel Air engines have been fitted to an AT-10 airship and to a Luscombe 8A monoplane, production numbers have been very limited.

Design and development
The Dair 100 engine is a twin-cylinder two-stroke, opposed-piston, displacement, liquid-cooled, diesel engine direct drive design. It produces at 2500 rpm, with a compression ratio of 18:1. The engine may use either diesel fuel (DERV) or Jet-A1 kerosene (AVTUR). Jet-A1 is more readily available at airfields, but its reduced lubricity (compared to diesel fuel) could mean that additional cylinder lubrication may be required. Fuel is directly injected into each cylinder, pressure being supplied by a hydraulically-governed mechanical fuel pump. Dry sump lubrication is by high pressure pump delivering oil to plain main bearings and con-rod bearings. ==Applications==
Applications
• Advanced Airship Technologies Group AT-10 airship • Luscombe 8A ==Specifications (Dair 100) ==
Source: Wikipedia ↗
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