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Aviation History
1957
1957 - 1212.PDF
300, FLIGHT, 30 August 1957 Left, Britannia 253 (model). Thus, for the first time in the Corporation's history, B.O.A.C. will be able to offer the most competitive aircraft on the world's richest and most contested route. As further deliveries are made, B.O.A.C.'s Britannia 312s will—according to the airline's present plans—gradually, take over all North American services now operated by Stratocruisers and DC-7Cs. The Britannia 310 fulfils the potential airline requirement for the big-capacity (28,000 lb), long-range (5,000 miles still air) turboprop transport. As such it will compete directly with the Boeing 707 and DC-8—due to enter service in 1959 and 1960. The development potential of Britannia 310 remains large, and there are plans to fit "supercharged" (i.e. split-compressor) Bristol Orion turboprops in place of the Proteus 755s. Canadair of Montreal earlier this year completed a licence-agreement with Bristol for the production and marketing of an Orion-Britannia development, to be built alongside the Argus maritime-reconnaissance version for the R.C.A.F.; this aircraft will be capable of 440 m.p.h. cruising speeds and improved payload-range performance. Looking further into the future, Bristol can foresee, depending on demand, a market for a thin-wing, lengthened version powered by Orions which will further increase speed and payload-range performance. The Britannia 310, with its big-capacity fuselage (up to 130 seats) and low operating costs, promises to be the ideal class of transport aircraft for exploiting the "thrift-class" low-fare services due to be introduced next spring. Britannia 100 Series The 300 Series was originally the medium-range version (with the same tankage as the early 100) of the Britannia, of which seven were ordered by B.O.A.C. These were subsequently released for export; five were bought by Northeast Airlines of Boston, for use (as from December next) on the holiday-route from New York and Boston to Miami. These machines, designated 305, were modified virtually up to 310 standard. The remaining two, 302s, were bought by Aeronaves de Mexico for use (as from October) on the airline's new route to New York. \ Powerplant Alvis Leonides Mk. 73Rotor diameter ... 48ft6Jin Length (main rotorfolded) 46ft 2in Gross weight ... 5,4001b.Max. speed ... ... 127 m.p.h. Drawing above and photograph below show Type 171 Sycamore.
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