MWfly B22

The MWfly B22 is a family of Italian aircraft engines, designed and produced by MWfly of Passirana di Rho for use in light aircraft.^[1]

Design and development

The B22 series are all four-cylinder four-stroke, horizontally-opposed, 2,203 cc (134.4 cu in) displacement, liquid-cooled, gasoline engine designs. They all employ single electronic ignition systems and have a compression ratio of 10.4:1.^[1]

B22D: Direct drive model with an output of 95 hp (71 kW) at 3300 rpm^[1] or 100 hp (75 kW) at 3500 rpm, or 135 hp (101 kW) at 4700 rpm.^[2]
B22G: Geared model with a mechanical gearbox reduction drive with a reduction ratio of 1.731:1 or 1.958:1 and an output of 122 hp (91 kW) at 4000 rpm, or 135 hp (101 kW) at 4700 rpm, respectively.^[2]
B22L: Model with a mechanical gearbox reduction drive with a reduction ratio of 1.73:1 and an output of 115 hp (86 kW) at 3950 rpm. By March 2018 the engine was no longer advertised on the company website and seems to be out of production.^[1]^[2]
B22R: Model with a mechanical gearbox reduction drive with a reduction ratio of 2.14:1 and an output of 130 hp (97 kW) at 4700 rpm. By March 2018 the engine was no longer advertised on the company website and seems to be out of production.^[1]^[2]

Data from Tacke^[1]

Type: Four cylinder, four stroke aircraft engine
Bore: 93 mm (3.7 in)
Stroke: 81 mm (3.2 in)
Displacement: 2,203 cc (134.4 cu in)
Length: 629 mm (24.8 in)
Width: 758 mm (29.8 in)
Height: 427 mm (16.8 in)
Dry weight: 75 kg (165.3 lb)

^ ^a ^b ^c ^d ^e ^f Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, pages 260-261. Flying Pages Europe SARL, 2015. ISSN 1368-485X
^ ^a ^b ^c ^d MWfly. "B22 AeroPower Series". www.mwfly.it. Retrieved 29 March 2018.