DIESEL AIR LIMITED NEWS RELEASE
NEW LIGHTWEIGHT AEROENGINE
USES DIESEL FUEL
1st July 1999
Diesel Air Ltd., a new company in the avaition field today announces its 100 h.p.
DAIR 100® engine to the world. Formed just over two years ago, the company is proud to
have designed, built and tested (for over 1000 hours) several prototypes.
The 100 h.p. engine is the first in a family of engines, using the same constructional
techniques to cover the range from 100 h.p. to 600 h.p. This first engine resembles a flat four
or ‘boxer’ engine, but only two cylinders, each with two pistons. The engine has two
outboard crankshafts connected by gears to the propeller-drive and accessories. This ‘flat
plane’ layout ensures the engine can be easily retrofitted in place of the popular
Continental® or Lycoming® engines, using the same mounting points in many cases.
Key Design features are:-
Work continues to refine the engine’s performance and bring it to a production status
prior to flight trials in the company’s aircraft and subsequent release of a small batch of
engines under PFA regulations for customer evaluation.
The first customer is AIRSHIP TECHNOLOGIES Ltd. ® , who are using the engine in a
Vectored Thrust Propulsion Unit to be used on the airships. This programe is
currently the subject of a Research & Development award under the UK Governments’s
Two Diesel Air 100 h.p. engines will be displayed at the Cranfield PFA Ralley from the
2nd – 4th July this year, and directors of the company will be on hand to welcome all enquiries.
Speaking of the engine, David Soul (Managing Director of Diesel Air ltd.) said:-
"We have been working for two years to provide the next generation of engines for
light aircraftof the 21st century. The diesel engine offers the best specific fuel
consumption of any prime mover with the two-stroke cycle giving the best efficiency
in that class. It also allows us to achievethe required power density from a diesel
for aircraft use. An operator using Avtur would see a fuel cost saving over the
life of the engine in the UK of around £15,000 compared with avgas. The tax
differential helps of course; using off-road (red) diesel, the saving could be