MWfly B25
{{Use dmy dates|date=March 2018}}
| {{Infobox Aircraft Begin
| name= B25 | image= | caption= }}{{Infobox Aircraft Engine |type=Aircraft engine |manufacturer=MWfly srl |designer= |national origin=Italy |first run= |major applications= |produced= |number built= |program cost= |unit cost=€21,900 (B25R model, 2015) |developed from=MWfly B22 |variants with their own articles= }} |
The MWfly B25 is a family of Italian aircraft engines, 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. {{ISSN|1368-485X}}
Design and development
The B25 series are all four-cylinder four-stroke, horizontally-opposed, {{convert|2500|cc|cuin|1|abbr=on}} 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 {{convert|115|hp|kW|0|abbr=on}} at 3300 rpm or {{convert|155|hp|kW|0|abbr=on}} at 4700 rpm.{{cite web|url = http://www.mwfly.it/mwfly%20b25%20engines.html|title = B25 AeroPower Series |accessdate = 29 March 2018|author= MWfly|work =www.mwfly.it}}
;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 {{convert|140|hp|kW|0|abbr=on}} at 4000 rpm or {{convert|155|hp|kW|0|abbr=on}} 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 {{convert|150|hp|kW|0|abbr=on}} 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)
{{pistonspecs|
|type=Four cylinder, four stroke aircraft engine
|bore={{convert|100|mm|in|1|abbr=on}}
|stroke={{convert|81|mm|in|1|abbr=on}}
|displacement={{convert|2500|cc|cuin|1|abbr=on}}
|length={{convert|640|mm|in|1|abbr=on}}
|diameter=
|width={{convert|758|mm|in|1|abbr=on}}
|height={{convert|427|mm|in|1|abbr=on}}
|weight={{convert|79|kg|lb|1|abbr=on}}
|valvetrain=
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=gasoline
|oilsystem=
|coolingsystem=liquid
|power={{convert|95|hp|kW|0|abbr=on}}
|specpower=
|compression=10.5:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
|designer=
|reduction_gear=helical gear mechanical reduction drive
|general_other=
|components_other=
|performance_other=
}}
See also
References
{{Reflist}}
External links
- {{Official website|http://www.mwfly.it/mwfly%20b25%20engines.html}}
Category:MWfly aircraft engines