Скачать "JET AGE: Triumphs And Failures. The Early Battle For Air Dominance: Boeing Vs. De Havilland"

The early battle for air dominance after WW2. The Jet Age revolution of post WW2. De Havilland against Boeing, Tupolev, and many other aviation innovators. The De Havilland Comet became the first passenger jet airliner in the world, initially powered by Frank Whittle's turbojet, the British inventor who, contrary to popular belief, had a working turbojet before Germany in April 1937. Some initial mistakes are reminiscent of today's issues with companies like Boeing, who also had initial teething problems, just like De Havilland's notorious issue with their Comet. The de Havilland DH.106 Comet is the world's first commercial jet airliner. Developed and manufactured by de Havilland in the United Kingdom, the Comet 1 prototype first flew in 1949. It features an aerodynamically clean design, four de Havilland Ghost turbojet engines buried in the wing roots, a pressurized cabin, and large windows. It offered a relatively quiet, comfortable passenger cabin for the era and was commercially promising at its debut in 1952. Within a year of the airliner's entry into service, three Comets were lost in highly publicized accidents after suffering catastrophic mishaps mid-flight. Two of these were found to be caused by structural failure resulting from metal fatigue in the airframe, a phenomenon not fully understood at the time; the other was due to overstressing of the airframe during flight through severe weather. The Comet was withdrawn from service and extensively tested. Design and construction flaws were ultimately identified, including improper riveting and dangerous stress concentrations around square cut-outs for the ADF (automatic direction finder) antennas. As a result, the Comet was extensively redesigned with structural reinforcements and other changes. Rival manufacturers heeded the lessons from the Comet when developing their aircraft. Although sales never fully recovered, the improved Comet 2 and the prototype Comet 3 culminated in the redesigned Comet 4 series, which debuted in 1958 and remained in commercial service until 1981. The Comet was also adapted for various military roles such as VIP, medical, passenger transport, and surveillance; the last Comet 4, used as a research platform, made its final flight in 1997. The most extensive modification resulted in a specialized maritime patrol derivative, the Hawker Siddeley Nimrod, which remained in service with the Royal Air Force until 2011, over 60 years after the Comet's first flight. The Comet was involved in 25 hull-loss accidents, including 13 fatal crashes, which resulted in 492 fatalities.[186] Pilot error was blamed for the type's first fatal accident, which occurred during takeoff at Karachi, Pakistan, on 3 March 1953 and involved a Canadian Pacific Airlines Comet 1A.[82] Three fatal Comet 1 crashes were due to structural problems, specifically British Overseas Airways Corporation flight 783 on 2 May 1953, British Overseas Airways Corporation flight 781 on 10 January 1954, and South African Airways flight 201 on 8 April 1954, led to the grounding of the entire Comet fleet. After design modifications were implemented, Comet services resumed on October 4, 1958, with Comet 4s. Watch more aircraft, heroes, and their stories and missions ➤ https://www.youtube.com/@Dronescapes To support/join the channel ➤ https://www.youtube.com/@Dronescapes/join IG ➤ https://www.facebook.com/unsupportedbrowser FB ➤ https://www.facebook.com/unsupportedbrowser X/Twitter ➤ https://dronescapes.video/2p89vedj THREADS ➤ https://www.facebook.com/unsupportedbrowser