FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1959
1959 - 0164.PDF
if© FLIGHT, 9 January 1959 steel. A three-piece baffle is positioned centrallybetween the collector plates by 30 spacer tubes. Top and bottom end panels are double-skinned,with cooling air passed between them. Exhaust gas passes between the rows of tubes and thede-icing ram air flows through the tubes them- selves. A shutter assembly seals off the ductto reduce drag when de-icing is not in use, and a temperature-sensitive element actuates aflap in the jet pipe to control the gas flow. The complete unit measures 26 x 19.5 x 18in andweighs 97 lb. Deloney Gallay heat shroud Heat Shrouds Delaney Gallay Ltd.,Cricklewood Delaney Gallay believe the Vanguard jet-pipeheat shroud to be the largest in production in the world. It is over 13ft long and 3ft wide,and provides 49 sq ft of insulation for a weight of 34.5 lb. Its function is to protect the wingand integral tankage from the heat of the jet- pipes, and also to act as a gutter and firewallto obviate damage due to wet starts. The construction comprises a layer of silica-insulantThermoftex RF.300, sandwiched between sheets of 0.004in stainless steel dimpled on thecold face and corrugated on the hot. Hydraulic pomps Lockheed Hydraulic BrakeCo. Ltd., Leamington Spa Equipment comprises hydraulic pumps, cut-outvalves and accumulators; in addition, an electric selector valve provides push-button operationfor the undercarriage. The pumps themselves comprise two Mk 8 pumps, each with a rateddelivery of 6 gal/min, and three Mk 9 pumps, with a rating of 3 gal/min. Ice protection (tail unit) D. Napier and Son Ltd., ActonProtection of the tail unit is effected by the Napier Spraymat electrical system. The lead-ing edges are divided into ten detachable sec- tions (three on each tailplane and four on thefin) and there are 13 cyclic areas separated by continuously heated leading-edge and chord-wise breaker strips. The total electrical load is 17.6 kVA continuous, plus 15.7 kVA cyclic,and all the circuits are balanced three-phase 208 V loads. The total protected area is 124sq ft and "Stoneguard" protective finish is applied to the leading edge. Intake ice-protection Dunlop Rubber Co.Ltd., London From Dunlop's Aviation Division in Coventrycome thermal de-icing mats for the annular Tyne intakes. Each mat comprises electriccircuits sandwiched between layers of glass- fibre applied directly to the metal intake itself.The circuits are so arranged as to give maximum temperature in the most vulnerableregions, and they operate at over 225 deg C. The mats are protected by electro-formed metalsheaths applied to the outer covering. Inverters The Plessey Co. Ltd., llfordStandard invertor is a 3-kVA unit of a new type with very high power/weight ratio. Froma D.C. input between 25 and 29 V the invertor provides a three-phase output at 200 V, 400c/s, with any power factor between 0.8 lagging and 0.95 leading, for serving instruments, radarand associated equipment. Each complete unit weighs less than 60 lb, can operate at full loadin ambient conditions from —30 to +45 deg C and holds output voltage within + 2i percent and frequency within ± 3 per cent. These close tolerances are maintained by two controlcircuits, voltage being held by a carbon-pile regulator with compounding transformer, andfrequency by a centrifugally operated carbon governor of novel design. Microswitches Honeywell Controls Ltd., GreenfordSix basic types of microswitch are fitted as standard: V3-1 high-capacity, single-pole, double-throw switch rated 30 V D.C., inductiveload 10 A at sea level or 6 A at 50,000ft, 0.25 oz; 1 EN-N14 potted environment-proofdouble switch weighing 2.5 oz; 1 SE-N7 and N8 sub-miniature rubber-sealed, aluminium-potted single-pole (normally closed), tated 3 A at sea level or 2.5 A at 50,000ft, 0.5 oz; 1 HS 6hermetically sealed double-pole, inductive load 10 A at 30 V, 1.5 oz; and 4 HS-N7 hermeticallysealed with potted leads, with same rating and weight at 1 HS 6. A total of 61 of theseswitches are fitted in circuits for chassis indica- tion, flaps and powerplant ice protection. Oxygen masks The Wallet Kidde Co. Ltd.,Northolt For B.E.A. Vanguard 951s a crew emergencyoxygen system is standard equipment. Gas is stored at 1,800 lb/sq in in a 750-litre bottlewhich feeds a flight-deck ring main. The latter supplies four mask stowage and controlvalve units, three flush in the roof and the fourth sunk into the navigator's working top.Each contains a reducing valve which, when the control knob is switched to the "on"position, feeds oxygen at a fixed rate to the mask, the latter being ejected from its housingby the same action. Unusual features include the stowed head harness and the use of acombined oxygen /microphone lead. Panel lighting Thorn Electrical IndustriesLtd., Enfield The Plasteck system of insttument-panel light-ing employs red light of a controlled wave- length diffused through an acrylic-plastic sheetwith opaque surface layers engraved to provide the required legends and inscriptions. Normolair pressure controller Pressure controller Normalair Ltd., YeovilThe latest type of Normalair multi-valve pressure-control equipment is fitted to theVanguard cabin-air system. The Type H controller works in conjunction with sixidentical discharge valves; the latter operate in parallel to regulate the air discharge andact as safety and inwards-relief valves. The parallel disposition of these valves, and theirimproved design, considerably reduces back- pressure and virtually eliminates surging. Con-trol is completely automatic, aircrew participa- tion being limited—except in emergency—tochoosing the altitude at which control is to start and finish. Total system weight is S3 lb. Propellers de Havilland Propellers Ltd.,Hatfield For the Vanguard a completely new design ofpropeller has been evolved, representative of the very latest techniques and embodying everymodern refinement. Each propeller has a diameter of 14ft 6in, and is driven via a 0.064 :1reduction gearing which restricts tip Mach number to 0.82 at a typical cruising speed withthe Tyne 1. The conical spinner, which incorporates electro-thermal de-icing, has aprofile giving maximum efficiency at the annular intake to the engine. The propeller has fourblades, Which are solid forgings in high- strength aluminium alloy. The standard pro-peller for the V.951 Vanguard has an activity factor of 138, but a 160 activity factor propeller,with the same hub, will be incorporated in the later and heavier Vanguards in order to takefull advantage of the power development of the Tyne. The propeller is controlled by a hydro-mechanical system operating on engine oil (Esso Aviation Turbo Oil 35). The follow-ing safety features are incorporated: two independent means of manual feathering; auto-matic hydro-mechanical drag-limiting control, sensitive to engine torque; automatic hydro-mechanical pitch locking, responsive to loss of control pressure or propeller overspeeding;automatic hydraulic pitch locking, responsive to loss of control pressure; a mechanical flight-idling stop; a secondary electro-hydraulic flight- idle safety stop; and a Beta-control hydraulicstop. Each complete propeller and associated systems weighs approximately 1,096 1b. Bladesection is an NACA Series 16 and estimated take-off thrust with the Tyne 1 at 100 kt is7,500 lb. Propeller alternator Rotol Ltd., GloucesterEach engine carries a Type (c) SNA/19 alternator to serve the propeller synchronizingand synchrophasing system. The SNA/19 consists of a shaft-mounted permanent-magnetrotor inside a three-phase coil-wound stator. Secured to the open head of the case is anend-frame incorporating a sprung plunger which, when the alternator is installed, engageswith a slot in the rotor assembly to ensure that the phase output is pre-aligned in accordancewith the requirements of die synchrophasing units. The alternator generates three-phase,45 c/s current at 19 V at 2,700 r.p.m. Sensing instruments Sanqamo Weston Ltd.,Enfield One of the special instruments developed forthe Vanguard is a tail-unit de-icing fault detector, incorporating a resistor element andindicator. Other instruments sense the tem- peratures of the leading-edge of the wing,turbine gas, fuel, outside air and cabin, as well as hydraulic and brake pressures. Rotax starter Starters Rotax Ltd., Willesden JunctionEach Rolls-Royce Tyne engine is started by a Rotax electric starter geared to the high-pressure spool. These starters are 28 V D.C. machines with a 60-second rating of 17.2 h.p.Rotax also supply the overspeed relay and engine-starting resistor. Turbo-fan Sir George Godfrey and PartnersLtd., Hanworth The AFT-1 Mk 1 is an axial-flow fan drivenby an engine-bleed turbine. The fan draws air over the heat exchangers of the air-condi-tioning system when the aircraft is on the ground. The unit weighs 40.25 lb, operates atbetween 14,400 and 16,500 r.p.m. and has a fan flow of 316 lb/min (5,900 cu ft/min), theturbine consuming 53 lb/min of air at 30 Ib/sq in which is added to the fan delivery. Vapour-cycle cooling Normalair Ltd., YeovilA complete Normalair vapour-cycle cooling system is available as an optional extra. It!function is to provide cabin cooling when the aircraft is stationary with engines stopped oiwhen taxying at low r.p.m. Water-extractor/silencer Sir George God-frey and Partners Ltd., Hanworth In the air-conditioning system a WE-150 Mk 1water-extractor /silencer is used to remove fret moisture from the cabin air supply; it incor-porates a hot-air by-pass duct and a silencei that attenuates the noise originating from thicold-air unit. Fr-e moisture is coalesced intc large drops on the downstream side of coalesce]gauzes; the droplets are then carried into thi collector, deposited on vertical tubes, drainecinto a sump and finally discharged through : restrictor which minimizes air-pressure lossesThe complete unit weighs 78 lb and is somi 56.5in long.
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
