The MWfly B25 is a family of
Italian 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 many ...
s, designed and produced by
MWfly of
Passirana di Rho for use in
light aircraft.
[Tacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', pages 260-261. Flying Pages Europe SARL, 2015. ]
Design and development
The B25 series are all four-cylinder
four-stroke
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...
,
horizontally-opposed, displacement, liquid-cooled, gasoline engine designs. They all employ dual
electronic ignition systems and have a
compression ratio
The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.
A fundamental specification for such engines, it is measured two ways: the stati ...
of 10.5:1.
Variants
;B25D
:Direct drive model with an output of at 3300 rpm or at 4700 rpm.
;B25G
:Geared model with a mechanical gearbox
reduction drive with a reduction ratio of 1.731:1 or 1.958:1 and an output of at 4000 rpm or at 4700 rpm, respectively.
;B25R
:Model with a
helical gear mechanical gearbox reduction drive with a reduction ratio of 1.731:1 and an output of at 4550 rpm. By March 2018 the engine was no longer advertised on the company website and seems to be out of production.
Specifications (B25R)
See also
References
External links
*{{Official website, http://www.mwfly.it/mwfly%20b25%20engines.html
MWfly aircraft engines
Liquid-cooled aircraft piston engines
2010s aircraft piston engines