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The Rolls-Royce Griffon is a British 37-litre (2,240 cu in) capacity, 60-degree V-12, liquid-cooled aero engine designed and built by Rolls-Royce Limited. In keeping with company convention, the Griffon was named after a bird of prey , in this case the griffon vulture .
The first Griffon-powered Spitfires suffered from poor high altitude performance due to having only a single stage supercharged engine. By 1943, Rolls-Royce engineers had developed a new Griffon engine, the 61 series, with a two-stage supercharger. In the end it was a slightly modified engine, the 65 series, which was used in the Mk XIV.
A preserved Rolls-Royce Griffon 58, one of the last Rolls-Royce piston engines to be produced. The red and white "dumb bell" object to the left of the engine is an air raid siren exhibit Rolls-Royce produced a range of piston engine types for aircraft use in the first half of the 20th century.
Depending on the supercharger fitted, engines were rated as low altitude (e.g.; Merlin 66, Griffon III), where the engine produced its maximum power below about 10,000 feet (3,000 m), medium altitude (Merlin 45), where the engine produced its maximum power up to about 20,000 feet (6,100 m), and high altitude (Merlin 70), where the engine produced its maximum power above about 25,000 feet ...
Bentley Motors Limited is the direct successor of Rolls-Royce Motors and its predecessor entities and owns historical Rolls-Royce assets such as the Crewe factory, pre-2003 vehicle designs and the L Series V8 engine. Rolls-Royce Motor Cars, a subsidiary of BMW AG established in 1998 that began production of vehicles in 2003.
The early Spitfire variants powered by the Rolls-Royce Griffon were adaptations of Mk Vc (early Mk XII) or Mark VIII (late Mk XII and Mk XIV) airframes. The later Griffon-engined Spitfire variants embodied new wings, tail units and undercarriages and were very different from any of the earlier Spitfire marks.
2025 Outlook: Griffon expects revenue to match 2024 at $2.6 billion versus the consensus of $2.605 billion; ... Price Action: GFF shares traded higher by 10.1% at $75.00 at the last check Wednesday.
Restoration in the UK included the aircraft being repainted as it did when it was with 232 Squadron as EF-F and the fitting of a Rolls-Royce Merlin X. [147] LZ842 took to the air for the first time post-restoration on 23 June 2021 out of Biggin Hill. [148] Spitfire LF Mk.IXc MH415 (G-AVDJ).