<!-- This article is a part of Wikipedia:WikiProject Aircraft. Please see Wikipedia:WikiProject Aircraft/page content for recommended layout. --> {{short description|Aircraft radial engine}} {{infobox aero engine |name= P.XI |image = Piaggio P.XI. - Teknikens och sjöfartens hus.jpg |caption = Preserved Piaggio P.XI |engine_type= Radial engine |national_origin = |manufacturer= Piaggio |first_run= |major_applications= |number_built = |developed_from = Gnome-Rhône Mistral Major |developed_into = |variants_with_their_own_articles = }}
The '''Piaggio P.XI''' was an Italian 14-cylinder radial aircraft engine. The P.XI was a licensed derivative of the French Gnome-Rhône Mistral Major 14K produced in Italy.<ref>Gunston 1989, p.110.</ref>
Further development led to the P.XIX. This featured an increased compression ratio from 6:1 to 7:1 and an rpm increase from 2,400 to 2,600.
==Variants== ;P.XI: ;P.XIbis: ;P.XI R.C.15: (geared, rated altitude {{convert|1500|m|ft|abbr=on}}) ;P.XI R.C.30: (geared, rated altitude {{convert|3000|m|ft|abbr=on}}) ;P.XI R.C.40D:<ref name=JAWA1938>{{cite book |last=Grey |first=C.G. |title=Jane's All the World's Aircraft 1938 |year=1938 |publisher=Sampson Low, Marston & company, ltd |location=London |author2=Bridgman, Leonard}} :{{convert|1,000|PS|kW|abbr=on|disp=flip}} (geared, rated altitude {{convert|4000|m|ft|abbr=on}})</ref> ;P.XI R.C.40S :{{convert|1,000|PS|kW|abbr=on|disp=flip}} (geared, rated altitude {{convert|4000|m|ft|abbr=on}}), opposite rotation to 40D. ;P.XI R.C.40bis: (geared, rated altitude {{convert|4000|m|ft|abbr=on}}) ;P.XI R.2C.40:{{convert|1,000|PS|kW|abbr=on|disp=flip}}, (geared, rated altitude {{convert|4000|m|ft|abbr=on}}), two-speed supercharger. ;P.XI C.40: (direct drive, rated altitude {{convert|4000|m|ft|abbr=on}}) ;P.XI R.C.44: (geared, rated altitude {{convert|4400|m|ft|abbr=on}}) ;P.XI R.C.50: (geared, rated altitude {{convert|5000|m|ft|abbr=on}}) ;P.XI R.C.60: (geared, rated altitude {{convert|6000|m|ft|abbr=on}}) ;P.XI R.C.72: (geared, rated altitude {{convert|7200|m|ft|abbr=on}}) ;P.XI R.C.100: ;P.XI R.C.100/2v: (geared, rated altitude {{convert|10000|m|ft|abbr=on}})
==Applications== *Breda Ba.65 *Breda Ba.88 *CANT Z.516 *CANT Z.1007 *Caproni Ca.135 *Caproni Ca.161 *Reggiane Re 2000 *Saab 17C *Savoia-Marchetti SM.79B *Savoia-Marchetti SM.84
==Specifications (P.XI R.C.40)== {{pistonspecs| <!-- If you do not understand how to use this template, please ask at Wikipedia talk:WikiProject Aircraft --> <!-- Please include units where appropriate (main comes first, alt in parentheses). If data are missing, leave the parameter blank (do not delete it). For additional lines, end your alt units with ) and start a new, fully-formatted line with * --> |ref=''Italian Civil & Military Aircraft 1930-1945 and Aircraft Engines of the World 1945.''<ref name="Thompson">{{cite book|last=Thompson|first=Jonathan|title=Italian Civil & Military Aircraft 1930-1945|publisher=Aero Publishers Inc.|location=New York|year=1963|isbn=0-8168-6500-0|lccn=63-17621}}</ref><ref name="Wilkinson1946">{{cite book |last=Wilkinson |first=Paul H. |title=Aircraft engines of the World 1945 |year=1945 |publisher=Paul H. Wilkinson |location=London |pages=306–307 |edition=2nd}}</ref> |type=14-cylinder radial engine |bore ={{convert|146|mm|in|abbr=on|2}} |stroke ={{convert|165|mm|in|abbr=on|2}} |displacement ={{convert|38.6|L|cuin|abbr=on|0}} |length={{convert|1700|mm|in|abbr=on|1}} |diameter={{convert|1328|mm|in|abbr=on|1}} |width= |height= |weight={{convert|650|kg|lb|abbr=on|0}} |valvetrain= 2 x overhead valves per cylinder operated by rockers and pushrods |supercharger= Centrifugal compressor, geared to 7.9:1 |turbocharger= |fuelsystem=1 x Piaggio T2-100 dual downdraught carburettor with automatic boost and mixture control |fueltype=87 octane |oilsystem=Pressure fed at {{convert|70|psi|kPa|abbr=on|0|disp=flip}}, dry sump |coolingsystem=Air |power= <br/> * '''Take-off: '''{{convert|1000|PS|kW|abbr=on|0}} at 2,200rpm * '''Military: '''{{convert|1000|PS|kW|abbr=on|0}} at 2,200rpm at {{convert|4000|m|ft|abbr=on}} * '''Cruising: '''{{convert|1000|PS|kW|abbr=on|0}} at 1,800rpm at {{convert|4000|m|ft|abbr=on}} |specpower= 19.1 kW/L (0.49 hp/cu in) |compression=6.0:1 |fuelcon= |specfuelcon=0.292 kg/kW/hr (0.48 lb/hp/hr) |oilcon=0.0134 kg/k/w/hr (0.022 lb/hp/hr) |power/weight= 1.15 kW/kg (0.699 hp/lb) |designer= |reduction_gear=Epicyclic reduction gear ratio 0.62:1 |general_other='''Frontal Area:''' {{convert|1.39|m2|sqft|abbr=on|1}} |components_other='''Starter:''' Garelli compressed air starter * '''Ignition:''' 2 x Marelli MF14 magnetos, 2 x spark plugs per cylinder fed by a shielded ignition harness. |performance_other= }}
==See also== {{aircontent <!-- other related articles that have not already linked: --> |see also=
<!-- designs which were developed into or from this aircraft: --> |related= *Gnome-Rhône Mistral Major *Piaggio P.XIX
<!-- aircraft that are of similar role, era, and capability this design: --> |similar aircraft=
<!-- relevant lists that this aircraft appears in: --> |lists= *List of aircraft engines
<!-- For aircraft engine articles. Engines that are of similar to this design: --> |similar engines=
<!-- See WP:Air/PC for more explanation of these fields. --> }}
==References== {{Commons category}}
===Notes=== {{reflist}}
===Bibliography=== {{refbegin}} *{{cite book|last=Thompson|first=Jonathan|title=Italian Civil & Military Aircraft 1930-1945|publisher=Aero Publishers Inc.|location=New York|year=1963|isbn=0-8168-6500-0|lccn=63-17621}} *{{cite book |last=Wilkinson |first=Paul H. |title=Aircraft engines of the World 1945 |year=1945 |publisher=Paul H. Wilkinson |location=London |pages=306–307 |edition=2nd}} *{{cite book |last=Grey |first=C. G. |title=Jane's All the World's Aircraft 1938 |year=1938 |publisher=Sampson Low, Marston & company, ltd |location=London |author2=Bridgman, Leonard}} * Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}} {{refend}}
{{Piaggio aeroengines}}
Category:1930s aircraft piston engines Category:Aircraft air-cooled radial piston engines P.XI Category:14-cylinder engines