When production ended in 1946 it was replaced by the improved L-649 and L-749 Constellation. The L-049 featured a pressurized fuselage and four Wright R-3350 eighteen-cylinder radial engines. When the flight ended, Allen stated “This machine works so well that you don’t need me anymore!”. The airplane operated on a flight from San Jose Municipal Airport, CA (SJC) to Lake Tahoe Airport, CA (TVL). From that time on a control tower employee reported the aircraft moved towards the south-southwest. Then, either because they believed they had sufficient altitude to clear the terrain or because they were unable to climb higher due to structural ice, the aircraft leveled off. The Lockheed L-649 Constellation was the first real civilian version of the Lockheed Constellation line, as the Lockheed L-049 Constellation was a simple redesign from the military Lockheed C-69 Constellation.The L-649 was planned to be the new standard version of the Constellation, but the L-749 Constellation, a co-jointly produced improved deritative, was chosen over the L-649 by most airlines. Even so, the secret of the Constellation’s development remains one of the best kept industrial secrets to this day. Problems with the R-3350 however, continued and production of the R-3350 was halted until the problems with the engines could be solved. In 1939, Lockheed began work on a 40-pasenger airliner, the L-049 Constellation, based on an order from TWA. Boston – New York – Pittsburgh – Chicago – Las Vegas – Los Angeles – San Francisco. A complete life sized mock up of the Excalibur was eventually constructed with battery operated retractable landing gear. A2A Simulations - COTS L-049 Constellation. Unable to stop within the remaining distance, the airplane overran and eventually crashed into a ravine. Image ID: 51325 Lockheed L-049 Constellation. L-649 aircraft followed, with more powerful engines, but all were soon upgraded to L-749 standard with long-range fuel tanks. World War II and further development Refueling directly from the trucks without allowing sufficient time for the fuel to settle. Image ID: 368466 Lockheed C-121A Constellation. On January 14, 1946, Pan Am began flying its L-049 equipment between Bermuda and New York, replacing the slower Boeing 314 Clipper that flew before it. ... the L649 and the L-749 were more powerful and had more fuel in the wings than the original World War II L-049. Lockheed L-049 Constellation adalah model pertama dari pesawat Lockheed Constellation.Pesawat ini mulai beroperasi sebagai pesawat angkut militer C-69 sayap rendah (low wing) selama Perang Dunia II untuk United States Army Air Force dan versi sipil setelah perang.. Ketika produksi berakhir pada tahun 1946, pesawat ini digantikan oleh pesawat L-649 dan L-749 Constellation. The Lockheed L-049 Constellation was one of the most graceful airliners placed in service between the end of World War II in 1945 and the advent of the commercial jet age in the mid-1950s. Northwest Airlines Flight 105 was cleared for takeoff on runway 22L at Midway, and took off Immediately. Few minutes after takeoff, while cruising at an altitude of 8,000 feet, the engine n°3 failed, followed 10 minutes later by a second engine. Five passengers and three crew members survived. Nevertheless, it was determined that the airplane deviated from its route, violated the State frontier of Bulgaria and penetrated deep into the interior of the Bulgarian airspace without warning. Hughes ordered 40 Excaliburs on July 10, 1940, making the order the largest in airline history at the time. 1940 - 1949. Nothing more was heard from the flight, which appeared to have crashed 45 km from Manaus. Lockheed designed the Model L-049 Constellation as an airliner for Transcontinental and Western Air and Pan American Airlines. The first production L-049 flew on July 12, 1945 and was delivered to TWA on November 14, 1945. Due to problems with the Constellation’s powerplant, the R-3350, the aircraft were grounded on February 1943. Famous actress Ava Gardner was on board the aircraft at this time. London – Paris – Lisbon – Dakar – Recife – Rio de Janeiro – São Paulo – Asunción – Buenos Aires. 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