SNECMA 14R

rdf:langString SNECMA 14R

rdf:langString Gear-driven 2-speed supercharger at 6.5:1 and 9.0:1 ratios

rdf:langString Single inlet and exhaust valves operated by rockers and pushrods

rdf:langString *Take-off: at 2,600 rpm at Hg boost with 100 octane fuel **Military, low: at 2,600 rpm at **Military, high: at 2,600 rpm at **Normal, low: at 2,400 rpm at **Normal, high: at 2,400 rpm at

rdf:langString The SNECMA 14R was a 14-cylinder two-row air-cooled radial engine developed in France just prior to the start of World War II from the Gnome-Rhône 14N. The 14N radial engine was itself an improved version of the popular pre-war Gnome-Rhône 14K Mistral Major series; designed and manufactured by Gnome et Rhône, a major French aircraft engine manufacturer whose origins pre-date the First World War. The improved 14R was initially known as the Gnome-Rhône 14P and then the Gnome-Rhône 14R. There were several improvements such as the introduction of a longer crankshaft and crankcase with a centre bearing, an increase in cylinder capacity, and a two-speed compressor. These changes allowed the engine to deliver 1,400hp at take-off and 1,300hp at 1,500m (1st gear) and 1200hp at 4000m (2nd gear). This came at the cost of a much increased total weight. It was expected that further development, such as the introduction of higher grade fuels, would lead to a power output of 1,660hp at low altitude. With the Fall of France, engine development was stopped under the occupation. After the war, development recommenced; however production of this engine after 1945 was transferred to the newly formed SNECMA and the engine was renamed the SNECMA 14R.

rdf:langString Starter: Air equipment electric inertia starter * Ignition: 2 x R.B. magnetos, 2 x short reach spark plugs per cylinder fed by a shielded ignition harness.

rdf:langString Air-cooled with baffles

rdf:langString Frontal Area:

rdf:langString * List of aircraft engines

rdf:langString Pressure fed at

rdf:langString Planetary / epicyclic bevel reduction gearing at 0.67:1 ratio