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Gnome-Rhône 9K

Gnome-Rhône 9K

The Gnome-Rhône 9K Mistral was a nine-cylinder 550 hp (405 kW) to 700 hp air-cooled radial engine, that started life as an enlarged Gnome-Rhône 7K with two extra cylinders.

9K
TypeRadial engine
ManufacturerGnome et Rhône
Developed intoPiaggio Stella P.IX

Design and development

The Gnome-Rhône 7K itself was an enlarged version of the Gnome-Rhône 5K which was derived from a licensed version of the Bristol Titan . A redesign of the cylinders is indicated by the K suffix. The 9K was followed by the larger and more powerful 14-cylinder twin row Gnome-Rhône 14K.

The 9K was license produced by Hungarian company Weiss Manfréd Repülogép- és Motorgyár Rt. (WM Rt, the aircraft engine factory of Manfred Weiss). The engine was used successfully in the MÁVAG Héja and Weiss WM-21 Sólyom aircraft. The 9K was also produced in the Soviet Union as the M-75 at GAZ-29 in Zaporozhye. Only small numbers were built and it was dropped in favor of the M-25 a version of the Wright Cyclone and the M-85 a version of the Gnome-Rhône 14K Mistral Major.

Variants

9K9Kbr9Kdr9Kdrs9Kers9Kfr
I.A.R. 9KIc40Licence production inRomaniabyIndustria Aeronautică Română(IAR).

Applications

  • Breguet Calcutta

  • IAR-15

  • Loire 70

  • Morane-Saulnier M.S.225

  • Savoia-Marchetti S.73 (license build Piaggio Stella P.IX)

  • Savoia-Marchetti SM.81 (license build Piaggio Stella P.IX)

  • SNCAC NC.510

  • Wibault 313

  • Wibault 365

Specifications (9Kd)

Data from [1]

General characteristics

  • Type: Nine-cylinder air-cooled radial engine.

  • Bore: 146 mm (5.75 in)

  • Stroke: 165 mm (6.50 in)

  • Displacement: 24.9 l (1,520 cu in)

  • Length: Kdr 0.5 reduction gear - 1,295 mm (50.98 in) Kdr 0.666· reduction gear - 1,297 mm (51.06 in) Kdrs 0.5 reduction gear - 1,323 mm (52.09 in) Kdrs 0.666· reduction gear - 1,325 mm (52.17 in)

  • Diameter: 1,299 mm (51.14 in)

  • Dry weight: Kdr 0.5 reduction gear - 355 kg (783 lb) Kdr 0.666· reduction gear - 360 kg (790 lb) Kdrs 0.5 reduction gear - 369 kg (814 lb) Kdrs 0.666· reduction gear - 374 kg (825 lb)

Components

  • Valvetrain: Two valves per cylinder, pushrod operated

  • Supercharger: Kdrsd - single stage centrifugal blower

  • Fuel system: Carburetor

  • Fuel type: Gasoline

  • Cooling system: Air-cooled

  • Reduction gear: Direct drive, 0.5:1 or 0.666·:1

Performance

  • Power output: Kdr - 370 kW (500 hp) at sea level Kdrs - 370 kW (500 hp) at 1,500 m (4,900 ft) Kdrs - 340 kW (450 hp) at 4,000 m (13,000 ft)

  • Compression ratio: 5.5:1

See also

Related development

  • Piaggio Stella P.IX

Related lists

  • List of aircraft engines

References

[1]
Citation Linkdev.museesafran.comMoteurs Gnome-Rhône series K (PDF) (in Spanish). Paris: Société Des Moteurs Gnome-Rhône. Retrieved 3 October 2014.
Sep 20, 2019, 1:14 PM
[2]
Citation Linkdev.museesafran.comMoteurs Gnome-Rhône series K
Sep 20, 2019, 1:14 PM
[3]
Citation Linken.wikipedia.orgThe original version of this page is from Wikipedia, you can edit the page right here on Everipedia.Text is available under the Creative Commons Attribution-ShareAlike License.Additional terms may apply.See everipedia.org/everipedia-termsfor further details.Images/media credited individually (click the icon for details).
Sep 20, 2019, 1:14 PM