LOT 278 1945 Merlin 225 Aero Engine
engines remain in Royal Air Force service today with the Battle of Britain Memorial Flight, and power many restored aircraft in private ownership worldwide. The first Merlin engine (PV-12) ran in 1933 and, after several modifications, the first production variants were built in 1936. The first operational aircraft to enter service using the Merlin were the Fairey Battle, the Hawker Hurricane and Supermarine Spitfire. More Merlin engines were made for the four-engined Avro Lancaster heavy bomber than for any other aircraft of that time; however, the engine is most closely associated with the Supermarine Spitfire, starting with the Spitfire’s maiden flight in 1936. A series of rapidly applied developments, brought about by wartime needs, markedly improved the engine’s performance and durability. This Merlin 225 aero engine, a more powerful, Packard version of
Considered a British icon, the Rolls-Royce Merlin was one of the most successful aircraft engines of the World War II era and many variants were built by the Rolls-Royce factories in Derby, Crewe and Glasgow, as well as by Ford of Britain at their Trafford Park factory, near Manchester. The Packard 225 was a version of the Rolls-Royce Merlin built in the United States. Production ceased in 1950 after a total of almost 150,000 engines had been delivered, the later variants being used for airliners and military transport aircraft. Merlin
SPECIFICATION Rotation
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Contract No. Estimate
LOT 279 1943 Bendix-Stromberg pressure injection carburettor The first Rolls-Royce Merlin engines used a SU carburettor;
however, the Merlin’s float controlled carburettor meant that both Spitfires and Hurricanes were unable to pitch nose down into a steep dive. The contemporary Bf 109E, which had direct fuel injection, could ‘bunt’ into a high-power dive to escape attack, leaving the pursuing aircraft behind because its fuel had been forced out of the carburettor’s float chamber by the effects of negative g-force. RAF fighter pilots soon learned to ‘half-roll’ their aircraft before diving to pursue their opponents. Further improvements were introduced throughout the Merlin range, in 1943 saw the introduction of a Bendix- Stromberg pressure carburettor that injected fuel at five pounds per square inch through a nozzle directly into the supercharger. This Stromberg pressure injection
SPECIFICATION Serial No.
Estimate 124 602954 £1,900 - £2,300
carburettor is regarded as new old stock as it has never been used, the carburettor is complete with all the correct linkages and would bolt straight onto Rolls-Royce Merlin type 66, 70, 76, 77 and 85 engines and the Packard built Merlin type 224, 225 and 226 engines.
Interested parties should satisfy themselves as to the description and condition of each lot prior to the sale. Buyers are advised to inspect the car in person or use a professional to carry out this service.
Righthand Tractor V-344672
W535/A61567 £17,000 - £22,000
the Rolls-Royce Merlin 25 was built under licence in the USA to be fitted into the Canadian built De Havilland Mosquito 25 or 26 light bomber and night fighter. Over one thousand Mosquito’s were built in Canada at the De Havilland subsidiary in Downsview, Toronto with over 450 of them using the Packard Merlin 225 which developed 1,680hp at 3,000rpm, over 150hp more than the British equivalent at the same boost pressure. The production of the Canadian Mosquito was terminated in October 1945. The engine and supercharger appear to be complete and even retains the protective caps fitted to the high tension leads for the sparking plugs. There is damage to the lower section of the original carburettor. Here is a very rare opportunity to purchase a British icon from the Second World War which is mounted for display or with re- commissioning and careful modification could be used as a running engine for a number of different aircraft of the period including Mustang P51, later Spitfires and the Mosquito.
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