The Hirth F-40 is a German
aircraft engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years ma ...
, that was designed and produced by
Hirth
Hirth Engines GmbH is an engine manufacturer based in Benningen, Germany. It is currently a part of the UMS Aero Group. Hirth began manufacturing aero engines in the 1920s, was taken over by Heinkel in WWII to develop the Heinkel-Hirth jet en ...
of
Benningen for use in
ultralight aircraft
Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and Aircraft flight control system, conventional three-a ...
.
[Tacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', pages 258-259. Flying Pages Europe SARL, 2015. ]
By March 2018, the engine was no longer advertised on the company website and seems to be out of production.
Design and development
The Hirth F-40 is a four-cylinder,
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of ...
, displacement, liquid-cooled, gasoline engine design, with a
helical gear
A gear is a rotating circular machine part having cut teeth or, in the case of a cogwheel or gearwheel, inserted teeth (called ''cogs''), which mesh with another (compatible) toothed part to transmit (convert) torque and speed. The basic p ...
mechanical gearbox
reduction drive. It produces at 4800 rpm.
Specifications (F-40)
See also
References
{{Hirth aeroengines
Hirth aircraft engines
Two-stroke aircraft piston engines
Air-cooled aircraft piston engines
2000s aircraft piston engines