• Short Summary

    This release is issued jointly by Sud Aviation of Paris and British Aircraft Corporation of London.

  • Description

    This release is issued jointly by Sud Aviation of Paris and British Aircraft Corporation of London.

    After collaborating in design studies for a Mach 2.2 (1400 mph) supersonic airliner, British Aircraft Corporation and Sud Aviation have reached general agreement on proposals for the joint design, development and production of an airliner of this type. BAC and Sud are now discussing these proposals with their respective Governments.

    Results of this close co-operation between two major European aviation groups will be in evidence on the British Aircraft Corporation stand at the SBAC Show at Farnborough (3rd - 9th September, 1962) when a model of the projected airliner is being shown in public.

    The Anglo-French proposals are for an aircraft of slender-delta planform, powered by four large turbojets. The engines, mounted in pairs in two nacelles beneath the wings, exhaust at the wing trailing edge, giving low cabin noise levels.

    A medium-range and a long-range version of the airliner are proposed, both versions being identical in outward appearance. Additional fuel capacity is provided in the long-range version. Both aircraft will accommodate about 100 passengers.

    Choice of Cruising Speed
    The choice of Mach 2.2 as the airliner's cruising speed was determined by technical and economic considerations.

    Current subsonic jets are highly developed and highly efficient. A moderate increase in present operating speeds would bring the aircraft into the transonic regime where a series falling-off in aerodynamic efficiency occurs due to the onset of 'wave drag'. With increasing Mach number the effects of this falling-off become mere and more gradual and, with increasing speed, the turbine engine becomes more efficient, so tending to restore overall efficiency.

    Good economy, in terms of seat-mile costs, can best be achieved by operating at the highest practicable supersonic speed in order to exploit the increased propulsive efficiency to the fullest advantage.

    BAC and Sud Aviation designers have proposed a Mach 2.2 cruising speed because techniques and materials for a supersonic airliner operating in this environment need not differ radically from current conventional practices. Beyond this speed aluminum alloy structures begin to suffer rapid deterioration, and a switch to new materials and construction methods is necessary.

    Operating Costs
    The first cost of the projected supersonic airliner will be higher than that of current airliners, as will fuel costs and some hourly direct costs, such as depreciation and insurance. But the greatly increased operating speed will have the effect of reducing these charges per aircraft mile.

    The total aircraft mile costs for a Mach 2.2 airliner can therefore be lower than those of the best subsonic airliner. Its greater annual carrying capacity enables the operator to meet given traffic requirements with a smaller fleet.

    Sonic Boom
    This problem has a great influence on the characteristics of a supersonic airliner, and the projected Anglo-French airliner is being designed to take account of the extensive research in this country and the U.S. into this problem. In addition, it is expected that by adopting special operational technique and by not flying at supersonic speeds below certain altitude disturbance can be reduced to reasonable proportions.

    Airfield Noise
    On the runway, noise produced by the supersonic airliner will be little more than that from current subsonic jets, and beyond the runways where the noise caused by present big jets is monitored, it should be quieter. This is because the greater engine power available enables higher speed and altitude to be attained in the initial phase of the climb and permits a proportionately greater throttling-back.

  • Tags

  • Data

    Film ID:
    VLVAEMRLQP0PQMFIKTY3D7CYNOKYS
    Media URN:
    VLVAEMRLQP0PQMFIKTY3D7CYNOKYS
    Group:
    Reuters - Source to be Verified
    Archive:
    Reuters
    Issue Date:
    02/09/1962
    Sound:
    Unknown
    HD Format:
    Available on request
    Stock:
    Black & White
    Duration:
    00:02:11:00
    Time in/Out:
    /
    Canister:
    N/A

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