The Mustang was designed to use the Allison V-1710 engine without an export-sensitive turbosupercharger or a multi-stage supercharger, resulting in limited high-altitude performance. The aircraft was first flown operationally and very successfully by the RAF and as a tactical-reconnaissance aircraft and fighter-bomber (Mustang Mk I). In mid 1942, a development project known as the Rolls-Royce Mustang X, replaced the Allison engine with a Rolls-Royce Merlin 65 two-stage inter-cooled supercharged engine. During testing at Rolls-Royce's airfield at Hucknall in England, it was clear the engine dramatically improved the aircraft's performance at altitudes above 15,000 ft (4,600 m) without sacrificing range. Following receipt of the test results and after further flights by a number of USAAF pilots, the results were so positive that North American began work on converting several aircraft developing into the P-51B/C (Mustang Mk III) model, which became the first long range fighter to be able to compete with the Luftwaffe's fighters. The definitive version, the P-51D, was powered by the Packard V-1650-7, a license-built version of the two-speed, two-stage-superchargedMerlin 66, and was armed with six .50 caliber (12.7 mm) AN/M2 Browning machine guns. (Full article...)
Image 4Transport is a key component of growth and globalization, such as in Seattle, Washington, United States.
Image 5According to Eurostat and the European Railway Agency, the fatality risk for passengers and occupants on European railways is 28 times lower when compared with car usage (based on data by EU-27 member nations, 2008–2010). (from Rail transport)
Image 6Lilienthal in mid-flight, Berlin c. 1895 (from Aviation)
Image 7Arizona - North America - Southwest - Interstate Highway System (4893585908) (from Road transport)
Image 14German soldiers in a railway car on the way to the front in August 1914. The message on the car reads Von München über Metz nach Paris ("From Munich via Metz to Paris"). (from Rail transport)
Image 15A cast iron fishbelly edge rail manufactured by Outram at the Butterley Company for the Cromford and High Peak Railway in 1831; these are smooth edge rails for wheels with flanges. (from Rail transport)
Image 16A 16th-century minecart, an early example of unpowered rail transport (from Rail transport)
Image 31Map of world railway network as of 2022 (from Rail transport)
Image 32The Great North Road near High gate on the approach to London before turnpiking. The highway was deeply rutted and spread onto adjoining land. (from Road transport)
Image 34Bardon Hill box in England (seen here in 2009) is a Midland Railway box dating from 1899, although the original mechanical lever frame has been replaced by electrical switches. (from Rail transport)
Image 38The engineering of this roundabout in Bristol, United Kingdom, attempts to make traffic flow free-moving.
Image 39A replica of a "Little Eaton Tramway" wagon; the tracks are plateways. (from Rail transport)
Image 40San Diego Trolley over Interstate 8 (from Road transport)
Image 41Interior view of a high-speed bullet train, manufactured in China (from Rail transport)
Image 42Customized motorcycle to maximize load capacity. Mobility is important for motorcycles, which are primarily used for transporting light cargo in urban areas. (from Transport)
Image 43Tunnels, such as the Tampere Tunnel, allow traffic to pass underground or through rock formations. (from Transport)
... that a section of Mississippi Highway 489 was designated as the Jason Boyd Memorial Highway to commemorate the MDOT superintendent who was killed while removing debris from the road?
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