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Aviation History
1956
1956 - 1204.PDF
FLIGHT, 31 August 1956 350-351 Powerplant ...Alvis Leonides Mk 73Rotor diameter ... 48ft 6.7in Fuselage length ... ... 42ftGross weight ... ... 5,4001b Max. Speed ... ... 127m.p.h. Above and left. Type 171 Sycamore and electric mats for the empennage. Airscrew blades and spinners are heated by internal electric elements. Provision is made in the cockpit for five crew members. A flight-director system is fitted as standard. The "systems" control panels are worthy of special note: the fuel panel, for example, is virtually a diagrammatic picture of the fuel system. Comprehensive radio and radar is fitted, including storm-warning equipment. The cabin of the 310 and 320 aircraft is 99ft long and 12ft wide. The entire length is unobstructed, with a headroom of 6ft 8in. Seating accommodation for up to as many as 133 passengers is possible, but great flexibility is provided by slotted rails set at the international track of 31.7in. Luxury accommodation, for example, would provide for 64 passengers including 17 single berths and 15 double berths. Principal variants are: Britannia 102: Initial production aircraft of which 15 are on order for B.O.A.C. (six delivered). Britannia 300: A lengthened version of the 102 (10ft 3in increase in length) of which two—302s—have been ordered by B.O.A.C. The prototype made its first flight on July 31. An additional five for B.O.A.C. are to be provided with 310 wing tankage to give increased range, and are designated 305. Britannia 310: Long-range version of the 300. Eleven 312s are on order for B.O.A.C., three 313s for El Al, and five 314s for C.P.A.L. Britannia 320: Medium-range version of the 310 (no physical difference between the two aircraft). Britannia 250: Similar to the 310. Three of these aircraft have been ordered by the M.o.S. as special mixed cargo/passenger transports, and a further ten by RAF. Transport Command.
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