MWfly B25

The MWfly B25 is a family of Italian aircraft engines, designed and produced by MWfly of Passirana di Rho for use in light aircraft.

Design and development
The B25 series are all four-cylinder four-stroke, horizontally-opposed, 2500 cc displacement, liquid-cooled, gasoline engine designs. They all employ dual electronic ignition systems and have a compression ratio of 10.5:1.

Variants

 * B25D
 * Direct drive model with an output of 115 hp at 3300 rpm or 155 hp 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 140 hp at 4000 rpm or 155 hp 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 150 hp at 4550 rpm. By March 2018 the engine was no longer advertised on the company website and seems to be out of production.