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The Boeing Model 307 Stratoliner (or Strato-Clipper in Pan American service, or C-75 in USAAF service) is an American stressed-skin four-engine low-wing tailwheel monoplane airliner derived from the B-17 Flying Fortress bomber, which entered commercial service in July 1940.
A 48 V system can provide more power, improve energy recuperation, [7] and allow up to an 85% decrease in cable mass. [10] 12-volt systems can provide only 3.5 kilowatts, while a 48 V power could achieve 15 to 20 kW or even 50 kW. 48 volts is below the level that is considered safe in dry conditions without special protective measures. [11]
US Air Force procurement of the Boeing 707 was very limited, amounting to three Model 707-153s designated VC-137A. When delivered in 1959 these had four 13,500 lb (6,100 kg) dry thrust Pratt & Whitney J57 (JT3C6) turbojets; when subsequently re-engined with 18,000 lbf (80 kN) dry thrust TF33-P-5 (JT3D) turbofans they were redesignated VC-137B.
Boeing Stratoliner may refer to: Boeing 307 Stratoliner , a 1930s high-altitude airliner, which was used as the C-75 by the USAAF in World War II. Boeing C-137 Stratoliner , a 1960s military VIP transport version of the Boeing 707
Boeing told Fortune it completed two investigations into Mohawk's claims, which included interviewing employees and walking the factory, but did not find evidence that any defective parts ended up ...
Boeing C-75, a 1942 military aircraft; Ruy Lopez chess openings ECO code; Malignant neoplasm of other endocrine glands and related structures ICD-10 code; Continental C75, an engine; Caldwell 75 , an open cluster in the constellation Scorpius
Recently a Canadian company has also offered a conversion to PZL Asz-62IT power. Dart Dakota Two C-47Bs converted to use the Rolls-Royce Dart turboprop (1,547 ehp) for development of operating procedures by airlines before introduction of BEA's Vickers Viscounts. Acquired from Field Aircraft Services Ltd in 1950 the installations were paid for ...
Pratt & Whitney provided a kit whereby JT3Cs could be converted to the JT3D specification, and performance, during an overhaul. [ 2 ] In 1959, important orders for the engine were the Boeing 707-120B and Boeing 720B when American Airlines ordered one 707 powered by JT3D turbofans and KLM ordered a JT3D-powered Douglas DC-8 .