with different propeller reduction gear; Impeller diameters 1st stage: 13.4 in (34 cm), 2nd stage: 11.3 in (29 cm); used on Spitfire F.Mk.XIV. Griffon 72 Increased maximum boost pressure to take advantage of 150-grade fuel; 2,245 hp (1,675 kW) at 9,250 ft (2,820 m). Griffon 74 Fuel-injected version of Griffon 72; used on Firefly Mk.IV. Griffon 83 Modified to drive contra-rotating propellers; 2,340 hp (1,745 kW) at 750 ft (230 m) and 2,100 hp (1,565 kW) at 12,250 ft (3,740 m). Griffon 85 2,375 hp (1,770 kW); used on Spiteful Mk.XIV. Griffon 89 2,350 hp (1,755 kW); used on Spiteful Mk.XV. Griffon 101 2,420 hp (1,805 kW); Two-stage, three-speed supercharger using Low Supercharger (L.S), Moderate Supercharger (M.S), or Full Supercharger (F.S); reduction gear ratio 4.45; Rolls-Royce fuel injection system. Used on Spiteful Mk.XVI. Griffon 130 2,420 hp (1,805 kW) at 5,000 ft (1,524 m) in L.S gear, 2,250 hp (1,678 kW) at 14,500 ft (4,419 m) M.S and 2,050 hp (1,529 kW) at 21,000 ft (6,400 m) F.S; reduction gear ratio 4.44; modified to drive contra-rotating propellers; Rolls-Royce fuel injection system. Compound Griffon RGC.30.SM.; turbo-compound engine - cancelled 1949 Turbo Griffon RGT.30.SM.; similar to Napier Nomad - as above Applications Note: Avro Shackleton Blackburn B-54 Bristol Beaufighter CAC CA-15 Fairey Barracuda Fairey Firefly Folland Fo.108 Hawker Fury Hawker Henley Hawker Tempest Mk III/IV Martin-Baker MB 5 Supermarine Seafang Supermarine Seafire Supermarine Seagull Supermarine Spiteful Supermarine Spitfire Racing aircraft Several North American Mustangs raced in the Unlimited Class races at the Reno Air Races have been fitted with Griffons. These include Red Baron (NL7715C), as well as the custom-built P-51XR Precious Metal (N6WJ) and Mustang/Learjet hybrid Miss Ashley II (N57LR). In all cases, Griffons with contra-rotating propellers, taken from Avro Shackleton patrol bombers were used in these aircraft. The RB51 Red Baron is noteworthy for holding the FAI piston-engine 3-kilometre world speed record from 1979 to 1989 (499.018 mph). Non-aircraft usage The 1980 Miss Budweiser Unlimited Hydroplane dominated the race circuit with a Rolls-Royce Griffon engine. It was the last of the competitive piston-engined boats, before turboshaft powerplants took over. In modern-day tractor pulling, Griffon engines are also in use, a single or double, rated each at 3,500 hp (2,600 kW). Survivors The Griffon engine continues to be used in restored Fireflies and later mark Spitfires worldwide. The Royal Air Force Battle of Britain Memorial Flight is a notable current operator