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Aviation History
1955
1955 - 1257.PDF
571 I i? i I .» i I ^ HANDLEY PAGE (READING) LTD. The Aerodrome, Woodley. Berks. Telephone: Somming 2211 Power plant . SpanLength Gross weightMax. speed .. Herald Four Alvis Leon-idct Major 95ft... 70ft 3in ... 34,0001b263 m.p.h. Herald Orders by Australian National Airways, Queensland Airlines and Lloyd Aero Colombiano have been announced by Handley Page for the Herald four-engined feeder-liner (or branch-liner, as it has been styled). A robust high-wing monoplane, the Herald is powered with four Alvis Leon ides Major piston engines. In the centre section of the wing there are no heavy spar booms, and the skin—a metal sandwich composed of a corrugated filler spot-welded to inner and outer skins—carries bending and end loads. It is foreseen that avoidance of highly stressed booms, susceptible to fatigue, will greatly increase the life of the wing. Shear loads are taken by three lightly loaded web members. The outer wings are attached to the centre section by numerous bolts which carry the load from the outer wings into the sandwich skin-panels. The centre section comprises a centre box, leading edge and trailing edge. The centre box has a corrugated metal sandwich-skin and three vertical webs, the centre web being a corrugated metal sandwich, and the other webs built up of stiffened light-alloy plate. Normal stressed-skin construction is used for the outer wings and for the fuselage also. In the tail, however, a departure from normal practice is noticed in the use of fluted skin, rendering the tail extremely simple by reducing internal structure to a minimum. The quickly detachable cabin seats allow rapid conversion for any of the Herald's three roles (airliner, freighter, or airliner/freighter) to another. The seats themselves are of low weight and capable of withstanding 9 g fore and aft loads. Attachment sockets allow them to be mounted facing either forward or aft on each side of a central gangway, and they can be spaced at 38in or 33jin pitch. In the former case 36 passengers can be accommodated; in the latter, 44 passengers. Each seat is mounted at three points. Two lateral rubes, forming the base of the seat, push into two sockets in a longitudinal member on the cabin wall, and a single vertical leg beside the gangway is keyed to a socket in the floor and secured by a retaining place and quick-release pin. The bulkheads, which form the front and rear of the passenger cabin and the wall of the toilet compartment, are attached to the fuselage frames by spring-loaded bolts and spigots. These enable the bulkheads to be removed easily from the aircraft when it is to be converted into a freighter. Alternatively, the front freight compartment can be enlarged by moving the forward bulkhead back to one of the several positions. As a freighter only, the Herald's total volume of freight space is 1,575 cu ft, with gangways clear. As an airliner with a seating capacity of 44, a cabin floor area of 220 sq ft is available. The bulkheads, in this arrange- ment, divide the fuselage to give 90.5 cu ft of space forward of the cabin. The rear freight capacity of 171 cu ft is constant for all passenger layouts. Passengers can sit where they wish in the cabin provided that the first 650 lb of freight is placed in the rear hold and remaining freight added in the ratio of 2 lb in the rear hold to every 1 lb in the front hold. As a combined airliner/freighter with a seating capacity of 36, the floor area of the cabin is 204 sq ft; the bulkheads, in this instance, give a forward freight space of 183.5 cu ft. When 24 passengers and freight are carried, the floor area of the cabin is 166.8 sq ft. Forward freight hold capacity is, in this case, 469.5 cu ft. Control and instrument arrangement is such that the Herald can be operated normally with a flight crew of two or—for ferrying purposes—with only one. A radio operator's station can be provided, if needed. Full dual flying controls are standard.
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