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Aviation History
1963
1963 - 0033.PDF
FLIGHT International, 3 January 1963 31 BELFAST'S BIG BOGIE BIG bogie indeed; but, as the top picture em phasizes, it is dwarfed by the fuselage on which it is hung. The vast Short SC.5/10 Belfast military freighter, ten of which are under con struction in Short Brothers & Harland Ltd's Queens Island factory for RAF Transport Command, has two main bogies each equipped with four double-tyred wheels. All three units of the undercarriage are products of Electro- Hydraulics Ltd, of Warrington. These photographs were taken during func tional testing of the complete landing gear on the first flight aircraft. To obviate difficulties of communication with the flight deck, the testing was supervised from a special console near the main gear, on which were grouped controls, power supplies and instrumentation. The latter included the cockpit indicator showing green for "down and locked," red during retraction or extension and amber for extension by the emergency standby system. Special rigs simu lated air loads and gusts which might be en countered during a takeoff or landing and which might, in severe cases, tend to fling an under carriage unit into either the up- or down-lock. As the sequence at the bottom shows, the main bogies retract forwards, about a skewed axis which causes the complete unit to turn dur ing retraction so that the bogie is housed at an angle of about 70° in a large blister outside the pressure hull. The undercarriage functional testing is part of a lengthy schedule covering the entire Belfast hydraulic system.
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