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Piaggio P.XI

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P.XI
Type

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This page is a soft redirect. Radial engine #REDIRECTmw:Help:Magic words#Other
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Manufacturer

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Developed from

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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.[1] Isotta Fraschini also produced a version of the 14K called the K.14.

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 Script error: No such module "convert".)
P.XI R.C.30
(geared, rated altitude Script error: No such module "convert".)
P.XI R.C.40D
[2]
P.XI R.C.40S 
Script error: No such module "convert". (geared, rated altitude Script error: No such module "convert".), opposite rotation to 40D.
P.XI R.C.40bis
(geared, rated altitude Script error: No such module "convert".)
P.XI R.2C.40
Script error: No such module "convert"., (geared, rated altitude Script error: No such module "convert".), two-speed supercharger.
P.XI C.40
(direct drive, rated altitude Script error: No such module "convert".)
P.XI R.C.44
(geared, rated altitude Script error: No such module "convert".)
P.XI R.C.50
(geared, rated altitude Script error: No such module "convert".)
P.XI R.C.60
(geared, rated altitude Script error: No such module "convert".)
P.XI R.C.72
(geared, rated altitude Script error: No such module "convert".)
P.XI R.C.l00
P.XI R.C.100/2v
(geared, rated altitude Script error: No such module "convert".)

Applications

Specifications (P.XI R.C.40)

Data from Italian Civil & Military Aircraft 1930-1945 and Aircraft Engines of the World 1945.[3][4]

General characteristics

  • Type: 14-cylinder radial engine
  • Bore: Script error: No such module "convert".
  • Stroke: Script error: No such module "convert".
  • Displacement: Script error: No such module "convert".
  • Length: Script error: No such module "convert".
  • Diameter: Script error: No such module "convert".
  • Dry weight: Script error: No such module "convert".
  • Frontal Area: Script error: No such module "convert".

Components

  • Valvetrain: 2 x overhead valves per cylinder operated by rockers and pushrods
  • Supercharger: Centrifugal compressor, geared to 7.9:1
  • Fuel system: 1 x Piaggio T2-100 dual downdraught carburettor with automatic boost and mixture control
  • Fuel type: 87 octane
  • Oil system: Pressure fed at Script error: No such module "convert"., dry sump
  • Cooling system: Air
  • Reduction gear: Epicyclic reduction gear ratio 0.62:1
  • Starter: Garelli compressed air starter
  • Ignition: 2 x Marelli MF14 magnetos, 2 x spark plugs per cylinder fed by a shielded ignition harness.

Performance

  • Power output:
  • Take-off: Script error: No such module "convert". at 2,200rpm
  • Military: Script error: No such module "convert". at 2,200rpm at Script error: No such module "convert".
  • Cruising: Script error: No such module "convert". at 1,800rpm at Script error: No such module "convert".
  • Specific power: 19.1 kW/l (0.49 hp/cu in)
  • Compression ratio: 6.0:1
  • Specific fuel consumption: 0.292 kg/kW/hr (0.48 lb/hp/hr)
  • Oil consumption: 0.0134 kg/k/w/hr (0.022 lb/hp/hr)
  • Power-to-weight ratio: 1.15 kW/kg (0.699 hp/lb)

See also

Related development

Related lists

References

Notes

  1. ^ Gunston 1989, p.110.
  2. ^ Grey, C.G.; Bridgman, Leonard (1938). Jane's All the World's Aircraft 1938. London: Sampson Low, Marston & company, ltd.  :Script error: No such module "convert". (geared, rated altitude Script error: No such module "convert".)
  3. ^ Thompson, Jonathan (1963). Italian Civil & Military Aircraft 1930-1945. New York: Aero Publishers Inc. ISBN 0-8168-6500-0. OCLC 63 - 1 762 1. 
  4. ^ Wilkinson, Paul H. (1945). Aircraft engines of the World 1945 (2nd ed.). London: Paul H. Wilkinson. pp. 306–307. 

Bibliography

  • Thompson, Jonathan (1963). Italian Civil & Military Aircraft 1930-1945. New York: Aero Publishers Inc. ISBN 0-8168-6500-0. OCLC 63 - 1 762 1. 
  • Wilkinson, Paul H. (1945). Aircraft engines of the World 1945 (2nd ed.). London: Paul H. Wilkinson. pp. 306–307. 
  • Grey, C.G.; Bridgman, Leonard (1938). Jane's All the World's Aircraft 1938. London: Sampson Low, Marston & company, ltd. 
  • Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
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