SNECMA 14R
| Industry | Aircraft engine manufacturing |
|---|---|
| Predecessor | Gnome-Rhône 14K Mistral Major series |
| Founded | before World War I |
| Products | Aircraft engines, including the SNECMA 14R radial engine |
The SNECMA 14R represents a 14-cylinder, dual-row, air-cooled radial engine developed in France shortly before the onset of World War II. It is a direct evolution of the Gnome-Rhône 14N. The 14N itself was an advancement over the earlier pre-war Gnome-Rhône 14K Mistral Major series, which was manufactured by Gnome et Rhône, a prominent French aircraft engine producer founded prior to World War I.
Initially designated as the Gnome-Rhône 14P and later renamed 14R, this powerplant incorporated several improvements such as an extended crankshaft and crankcase featuring a central bearing, enlarged cylinder displacement, and a two-speed supercharger. These modifications allowed it to deliver 1,400hp during take-off, 1,300hp at 1,500 meters altitude (in first gear), and 1,200hp at 4,000 meters (in second gear), albeit with an increase in overall mass. Subsequent development efforts targeted achieving 1,660hp at low altitude by utilizing higher-octane fuels.
Production was interrupted during the German occupation following France's defeat but recommenced after the war under the management of SNECMA, which assumed manufacturing responsibilities and rebranded the engine as the SNECMA 14R.
Variants
- 14R-04
- Enhanced performance model operating on 92 Octane fuel, equipped with a two-speed supercharger (ratios of 6.5:1 and 9:1), left-hand rotation, providing take-off power.
- 14R-05
- Right-hand rotation counterpart to the 14R-04.
- 14R-08
- Increased engine speed from 2,400 to 2,600 RPM for greater output, left-hand rotation.
- 14R-09
- Right-hand rotation version corresponding to the 14R-08.
- 14R-24
- Left-hand rotation variant.
- 14R-25
- Right-hand rotation equivalent of the 14R-24.
- 14R-26
- Left-hand rotation model.
- 14R-27
- Right-hand rotation counterpart to the 14R-26.
- 14R-28
- Left-hand rotation type.
- 14R-29
- Right-hand rotation version of the 14R-28.
- 14R-32
- Left-hand rotation configuration.
- 14R-100
- 14R-200
- Left-hand rotation variant.
- 14R-201
- Right-hand rotation version.
- 14R-210
- 28T-1
- A unique 28-cylinder design created by coupling two 14R-24 engines in a back-to-back arrangement with coaxial contra-rotating propeller shafts. Features include direct fuel injection and a two-speed supercharger, delivering take-off power on 100/130 octane fuel.
Applications
- Sud-Est SE.200 Amphitrite
- SNCASE SE-1010
- Nord Noroit – utilized Gnome-Rhône 14R engines exclusively in prototype models
- Nord 1500 Noréclair
- Nord Noratlas – prototype fitted with Gnome-Rhône 14R
- SNCAC NC.211 Cormoran