Diesel Air Limited builds a liquid-cooled 100 hp Diesel engine, whose name is a contraction from "Diesel Air Limited".

-It has four horizontal opposite cylinders. And the pistons are also opposite to each other forming a chamber in the center, as they both approach their TDC. It is the same formula as that of the Junkers Jumo Diesel.

“Dair engine without end cover”

-As we see, there is a crankshaft at each end of the engine and the two are joined by a gear train located at the front. It has a 2-stroke cycle.

-We see something interesting: an injection pump with only two outputs to the injectors, and is that despite having four cylinders, by the arrangement mentioned above, there are only two combustion chambers.

“Dair engine”

-It can run on Jet A-1 kerosene or automotive diesel.

-As it is predictable, it uses turbocharging to avoid losing power at high altitudes or losing effectiveness in the compression so that self-ignition is produced.

-Dair gave construction licenses to Diesel-Tech and Howells-Aero Engine.