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.Gunston 1989, p.110. Further development led to the P.XIX. This featured an increased

compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

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 ) ;P.XI R.C.30: (geared, rated altitude ) ;P.XI R.C.40D: : (geared, rated altitude ) ;P.XI R.C.40S : (geared, rated altitude ), opposite rotation to 40D. ;P.XI R.C.40bis: (geared, rated altitude ) ;P.XI R.2C.40:, (geared, rated altitude ), two-speed supercharger. ;P.XI C.40: (direct drive, rated altitude ) ;P.XI R.C.44: (geared, rated altitude ) ;P.XI R.C.50: (geared, rated altitude ) ;P.XI R.C.60: (geared, rated altitude ) ;P.XI R.C.72: (geared, rated altitude ) ;P.XI R.C.100: ;P.XI R.C.100/2v: (geared, rated altitude )

Applications

* Breda Ba.65 * Breda Ba.88 * CANT Z.516 *

CANT Z.1007 The CANT Z.1007 ''Alcione'' (''Kingfisher'') was a three-engined medium bomber designed and produced by the Italian aircraft manufacturer CANT. It was regarded by some as "the best Italian bomber of World War II", although its wooden structure ...

* Caproni Ca.135 *

Caproni Ca.161 The Caproni Ca.161 was an aircraft built in Italy in 1936, in an attempt to set a new world flight altitude record, altitude record. It was a conventional biplane with two-bay, Stagger (aviation), staggered wings of equal span, based on Caproni ...

Reggiane Re 2000 The Reggiane Re.2000 ''Falco'' I is an Italian all metal, low-wing monoplane developed and manufactured by aircraft company Reggiane. The type was used by the ''Regia Aeronautica'' (Italian Air Force) and the Swedish Air Force during the first pa ...

Saab 17 The Saab 17 is a Sweden, Swedish single-engine monoplane reconnaissance dive-bomber aircraft of the 1940s originally developed by AB Svenska Järnvägsverkstädernas Aeroplanavdelning, ASJA prior to its merger into Saab AB , Saab. It was the fir ...

C * Savoia-Marchetti SM.79B * Savoia-Marchetti SM.84

Specifications (P.XI R.C.40)

References

Notes

Bibliography