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2. Supermarine Spitfire variants: specifications, performance ...

   en.wikipedia.org/wiki/Supermarine_Spitfire...

   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 ...

3. Rolls-Royce Merlin - Wikipedia

   en.wikipedia.org/wiki/Rolls-Royce_Merlin

   The modified engine was designated the "TMO" and the modified exhaust system was supplied as kit that could be installed on existing engines either by the operator or by Rolls-Royce. [ 24 ] Power ratings for the civil Merlin 600, 620, and 621-series was 1,160 hp (870 kW) continuous cruising at 23,500 feet (7,200 m), and 1,725 hp (1,286 kW) for ...

4. Supermarine Spitfire (late Merlin-powered variants) - Wikipedia

   en.wikipedia.org/wiki/Supermarine_Spitfire_(late...

   The performance increase was described by Jeffrey Quill as a "quantum leap" over that of the Mk Vb and another Spitfire airframe, R6700 was modified to take the new engine. Although design work on the Mk VII and VIII series was under way, these would take over a year to get into production and a counter to the Fw 190 was urgently needed.

5. Supermarine Speed Spitfire - Wikipedia

   en.wikipedia.org/wiki/Supermarine_Speed_Spitfire

   The Spitfire was much slower at such a low level; the prototype was only capable of 290 mph (470 km/h) at this height. [1] Consequently, a record-breaking machine would have to be extensively modified. Rolls-Royce began work on a sprint version of the Spitfire's Merlin engine, to run on a special fuel mix. [1]

6. Packard V-1650 Merlin - Wikipedia

   en.wikipedia.org/wiki/Packard_V-1650_Merlin

   This model was later produced by Packard as the V-1650-3 and became known as the "high altitude" Merlin destined for the P-51, the first two-stage Merlin-Mustang conversion flying with a Merlin 65 [5] as the Mustang X in October 1942, the production V-1650-3 engined P-51B (Mustang III) entering service in 1943. The two-speed, two-stage ...

7. Rolls-Royce Mustang Mk.X - Wikipedia

   en.wikipedia.org/wiki/Rolls-Royce_Mustang_Mk.X

   Early Allison-powered Mustang c.1942. The RAF had, following modifications by Lockheed at Speke to fit an oblique camera and other local British modifications, been actively using the Mustang I (Model NA-73) since early 1942 for Army Cooperation, tactical reconnaissance and as a fighter bomber and loved the aircraft's speed, range and performance.

8. Supermarine Spitfire (Griffon-powered variants) - Wikipedia

   en.wikipedia.org/wiki/Supermarine_Spitfire...

   These remarkable increases in performance arose chiefly from the introduction of the Rolls-Royce Griffon engine in place of the famous Merlin of earlier variants. Rated at 2,050 hp (1,530 kW), the 12-cylinder Vee liquid-cooled Griffon 61 engine had a two-stage supercharger, giving the Spitfire the exceptional performance at high altitude that ...

9. Supermarine Spitfire (early Merlin-powered variants) - Wikipedia

   en.wikipedia.org/wiki/Supermarine_Spitfire...

   Spitfire Mk Vb BM597 of Duxford's Historic Aircraft Collection in the markings of 317 (Polish) "Wileński" Squadron. Supermarine Spitfire variants powered by early model Rolls-Royce Merlin engines mostly utilised single-speed, single-stage superchargers.