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The Air Force changed the program to full weapon development and awarded a contract for an XB-70 prototype and 11 YB-70s in August 1960. [49] [52] In November 1960, the B-70 program received a $265 million (equivalent to $2.7 billion today) appropriation from Congress for FY 1961.
The Northrop YB-49 was an American prototype jet-powered heavy bomber developed by Northrop Corporation shortly after World War II for service with the United States Air Force. [1] The YB-49 featured a flying wing design and was a turbojet-powered development of the earlier, piston-engined Northrop XB-35 and YB-35. The two YB-49s built were ...
The first YB-60 prototype's crew numbered five; the second prototype's numbered nine, as it did in the planned production B-60s. Production B-60s were to have defensive armament similar to those of the B-36. [3] The Convair YB-60, bearing serial number 49-2676, conducted its inaugural flight on April 18, 1952, under the command of Beryl Erickson.
The second aircraft, YB-43 Versatile II, taking off.Undated. Note the solid, orange nose-cone that replaced the original clear nose A front 3/4 view of the aircraft. As Douglas predicted, the work itself was not overly complex but almost two years were required to ready the aircraft for flight due to delays in obtaining the J35 powerplants. [1]
The B-35 was the brainchild of Jack Northrop, who made the flying wing the focus of his work during the 1930s.In 1941 before the USA entered World War II, Northrop and Consolidated Vultee Corporation had been commissioned to develop a large wing-only, long-range bomber designated XB-35 and XB-36.
The Boeing XB-39 Superfortress was a United States prototype bomber aircraft, a single example of the B-29 Superfortress converted to fly with alternative powerplants. It was intended to demonstrate that the B-29 could still be put into service even if the first choice of engine, the air-cooled Wright R-3350 radial engine, ran into development or production difficulties.
The "R" prefix designated combat obsolescence. Many of these RB-17B aircraft, along with at least one still-airworthy YB-17, were stationed at Sebring Airfield, where the exterior scenes were filmed for the Warner Bros. war drama Air Force (1943), directed by Howard Hawks , and starring (among others) John Garfield , Arthur Kennedy , Gig Young ...
The production version of the YB-12 with provision for a 365 US gal (1,380 L) fuel tank in the bomb bay, giving the B-12A a combat range of 1,240 mi (2,000 km), 25 built, 23 still in service in April 1940. [7] YB-13 Re-engined version of the YB-10 powered by two 700 hp (520 kW) Pratt & Whitney R-1860-17 Hornet B radial engines. Ten were on ...