Question: Who was the desiner for the further developments of Aquila which became 14-cylinder two-row radial aircraft engine?

full_context: Document 1: Rolls-Royce Meteor: The Rolls-Royce Meteor was a British tank engine developed in the Second World War. It was used in British tanks up to 1964.
Document 2: Bristol Hercules: The Bristol Hercules was a 14-cylinder two-row radial aircraft engine designed by Sir Roy Fedden and produced by the Bristol Engine Company starting in 1939. It was the first of their single sleeve valve (Burt-McCollum, or Argyll, type) designs to see widespread use, powering many aircraft in the mid-World War II timeframe.
Document 3: Frank Whittle: Air Commodore Sir Frank Whittle {'1': ", '2': ", '3': ", '4': "} (1 June 1907 – 9 August 1996) was an English Royal Air Force (RAF) engineer air officer. He is credited with single-handedly inventing the turbojet engine. A patent was submitted by Maxime Guillaume in 1921 for a similar invention; however, this was technically unfeasible at the time. Whittle's jet engines were developed some years earlier than those of Germany's Hans von Ohain who was the designer of the first "operational" turbojet engine.
Document 4: Armstrong Siddeley Jaguar: The Armstrong Siddeley Jaguar was an aero engine developed by Armstrong Siddeley. The Jaguar was a petrol-fuelled air-cooled 14-cylinder two-row radial engine design. The Jaguar III was first used in 1923, followed in 1925 by the Jaguar IV and in 1927 by the Jaguar VI.
Document 5: Bristol Taurus: The Taurus was a British 14-cylinder two-row radial aircraft engine, produced by the Bristol Engine Company starting in 1936. The Taurus was developed by adding cylinders to the existing Aquila design, creating a powerplant that produced just over 1,000 horsepower (750 kW) with very low weight.
Document 6: Beardmore Halford Pullinger: Beardmore-Halford-Pullinger (BHP) were aircraft engines used in production between 1916 and 1918. The engines were used on many notable First World War aircraft, such as the Airco DH.4, DH.9, DH.10, de Havilland DH.15 and Avro 529 aircraft.
Document 7: Airco DH.9A: The Airco DH.9A was a British single-engined light bomber designed and first used shortly before the end of the First World War. It was a development of the unsuccessful Airco DH.9 bomber, featuring a strengthened structure and, crucially, replacing the under-powered and unreliable inline 6-cylinder Siddeley Puma engine of the DH.9 with the American V-12 Liberty engine.
Document 8: Pratt &amp; Whitney R-1830 Twin Wasp: The Pratt & Whitney R-1830 Twin Wasp was an American aircraft engine widely used in the 1930s and 1940s. Produced by Pratt & Whitney, it was a two-row, 14-cylinder, air-cooled radial design. It displaced 1830 cuin and its bore and stroke were both 5.5 in (140 mm). A total of 173,618 R-1830 engines were built, and from their use in two of the most-produced aircraft ever built, the four-engined B-24 heavy bomber and twin-engined DC-3 transport, more Twin Wasps may have been built than any other aviation piston engine in history. A "bored-out" version (to a 5.75 inch/146 mm cylinder bore) with a slightly higher power rating and other slight changes in detail design was produced as the R-2000.
Document 9: Royal Aircraft Factory F.E.1: The Royal Aircraft Factory F.E.1 was designed and built in 1910 by the pioneer designer Geoffrey de Havilland. He used it to teach himself to fly during late 1910. After De Havilland was appointed assistant designer and test pilot at Army Balloon Factory at Farnborough (later the Royal Aircraft Factory) in December 1910 the War Office bought the aircraft for £400. the aircraft was given the designation F.E.1 ("Farman Experimental")
Document 10: SNECMA 14R: 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.
Document 11: Gnome-Rhône 14N: The Gnome-Rhône 14N was a 14-cylinder two-row air-cooled radial engine designed and manufactured by Gnome-Rhône. A development of the pre-war Gnome-Rhône 14K, the 14N was used on several French and German aircraft of World War II.
Document 12: Mikulin AM-34: The Mikulin AM-34 (M-34) was a Soviet mass-produced, liquid-cooled, aircraft engine. Before the war, the Russian aero engine industry was mainly engaged in producing engines of foreign design, notably Wright, Bristol, Hispano-Suiza, and Gnome-Rhône. Several engines of so-called original design have been developed, although these were probably largely based on foreign models. The M-34 was thought to have been originally designed in Italy by Fiat for the Russians; its design closely follows Italian in-line aero engine practice. Its initial development was troubled, but it eventually became one of the most successful Soviet aircraft engines of the 1930s. It was utilized on the Beriev MBR-2, Tupolev TB-3, Tupolev TB-4, Tupolev ANT-20, Petlyakov Pe-8, Kalinin K-7, Polikarpov I-17, and Bolkhovitinov DB-A aircraft as well as the G-5 and various prototype motor torpedo boats. A version of the maritime model was adapted for use in several prototype heavy tanks in 1939, although none were placed into production.
Document 13: Nakajima Ha5: The Nakajima Ha-5 is a twin row, 14 cylinder air-cooled radial aircraft engine built by the Japanese Nakajima Aircraft Company. The engine was a development of earlier single-row Japanese engines, the Kotobuki and Hikari, which had combined features of the Bristol Jupiter and Pratt & Whitney R-1340 Wasp designs. First introduced in a 1,000 PS prototype in 1933, about 7,000 civilian and 5,500 military Ha-5's were built during World War II. The Ha-5 had separate cam-discs for the front and rear rows of cylinders like American designs, rather than using a single, front-mounted cam-disc with long and short pushrods to operate both rows of cylinder valves. The Ha-5 was a twin-row development of the Nakajima Hikari, which was itself a development of the Nakajima Kotobuki. It spawned several improved variants, namely the Ha-41, with a single stage supercharger, and the Ha-109, which featured a two-speed, single stage supercharger. The later Ha-219 was based on the same cylinder design, but was increased in size to 18 cylinders.
Document 14: Bristol Aquila: The Aquila was a nine-cylinder single-row radial aircraft engine designed by the Bristol Engine Company starting in 1934. A sleeve valve engine, its basic design was developed from the Bristol Perseus. The Aquila was never used in production, but further developments led to the Bristol Hercules, Bristol Taurus, and Bristol Centaurus.
Document 15: Heinkel HeS 011: The Heinkel HeS 011 or Heinkel-Hirth 109-011 "(HeS - Heinkel Strahltriebwerke)" was an advanced World War II jet engine built by Heinkel-Hirth. It featured a unique compressor arrangement, starting with a low-compression impeller in the intake, followed by a "diagonal" stage similar to a centrifugal compressor, and then a three-stage axial compressor. Many of the German jet-powered aircraft designs at the end of the war were designed to use the HeS 011, but the HeS 011 engine was not ready for production before the war ended in Europe and only small numbers of prototypes were produced.
ground_truth: Sir Roy Fedden