FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1939
1939 - 0420.PDF
i58 FLIGHT. FEBRUARY 16, 1939 " Flight " photograph. This somewhat unusual view of the 95 adequately shows the virtues of the high-wing type from the passengers' point of view. Above the cabin is a remote-controlled D/F loop aerial of the enclosed type, while below the fuselage can be seen the twin heated pitot-heads. wing is undisturbed, and the lift, therefore, is practically unimpaired. The wrapper cowl which encircles the cylinder head is in two portions which fix on to the exhaust pipe at the top, and, by means of dead-centre fasteners, are drawn together at the bottom permitting access to the sparking plugs. The other cowlings are quickly removable and held by Dzus fasteners. Four welded aluminium fuel tanks are mounted in the in board sections of the wings—two on each side of the fuselage; one, of 89-gal. capacity, is placed in front of the main spar and the second, of 112-gal., is behind the spar. Detachable panels are provided in the top skin of the wing for inspection or removal. There is a selector valve for each engine; this is mounted on the front spar and has four positions:—"off," "supply from front tank," "supply from rear tank," or a cross feed from which each tank is connected to the opposite engine. The fuel passes from this valve to a unit of D.H. design mounted behind each engine on the fireproof bulkhead. This comprises a filter, a non-return valve and a pressure- reducing valve, with connection for the gauge and a low- pressure warning device. The fuel is drawn from the filter by a Bristol duplex pump and returned at lolb./sq. in. to the pressure-reducing valve, which delivers it at 2Jib./sq. in. The non-return valve is located between the suction and return connections from the pump, and gives a gravity feed to the carburettor -when the pump is not running, closing again after the generation of pressure. On the top rails of each engine mounting is an oil tank of 105-gal. capacity. Within the tank is the main suction filter, the. thermo-pocket and the quick warming oil chamber, con sisting of a cylindrical device in the centre of the tanks into which the cold engine oil percolates as soon as the warm oil is used. The oil cooler is mounted on the starboard member of the engine mounting. Cold air is directed from the front of the engine to the oil cooler and is controlled at the exit. A yellow light shows in the cockpit when the oil pressure falls below the minimum limit. The controls and instruments are described and illustrated on pp. 168-169. Some Contributors to the D.H.9 5 Aircraftings, Ltd.: fuel cocks. Arrow Switches, Ltd.: switches. Auto motive Products, Ltd.: undercarriage airdraulic, shock-absorber struts. Air craft Components, Ltd.: tail wheel units, hydraulic equipment. Amal, Ltd.: oil niters, etc. Avery Equipment Co.: Avery couplings. Bendix, Ltd.: brakes. A. F. Bulgin Sc Co.: switches. D. H. Bonnella & Sons: lamp holders, etc. Burgess Products, Ltd.: micro switches. British Thomson- Houston Co., Ltd.: generators, charging relay units, solenoid switches. Breeze Corporation: couplings. Birmingham Aluminium Casting Co.: castings. British Ropes, Ltd.: control cables. Birmabright, Ltd.: tubing (aluminium alloy). Bristol Aeroplane Co., Ltd.: engines and accessories. Jas. Booth & Sons: duralumin. Dunlop Rubber Co., Ltd.: wheels and tyres, de-icing equipment. De Havil- land Aircraft Co., Ltd.: Hydromatic airscrews. Exactor Control Co., Ltd.: Exactor throttle control units. Ellison Insulations, Ltd.: Tufnol. General Electric Co., Ltd.." bulbs (cabin, navigation, instrument, landing light, etc.), plugs and sockets, cable. H. M. Hobson (Aircraft & Motor) Components, Ltd.: master-control carburetters. Hughes, Johnson Stampings, Ltd.: forg- ings. Kelvin, Bottomley & Baird, Ltd.: altimeters, tachometers, synchro scope, compasses. Walter Kidde Co., Ltd.: fire extinguisher equipment. Light Metal Forgings, Ltd.: forgings. • A. P. Lundberg & Sons, Ltd.: switches. M.R.C., Ltd.: Teleflex controls. Northern Aluminium Co., Ltd.: castings, Alclad, extrusions. Power Flexible Tubing Co., Ltd.: flexible hoses, tubing. Peto & Radford, Ltd.: accumulators. Plessey Co., Ltd.: Pesco pumps. Reynolds Tube Co., Ltd.: tubing. Rotax, Ltd.: windscreen wipers, landing lights, navigation lights, vacuum pumps, gill motors, starter motor, miscel laneous switches. Rotherham & Sons: cocks. L. A. Rnmbold & Co., Ltd.: cabin furnishings. S. Smith's Aircraft Instruments: turn-and-bank indicators. "A.S.I., rate-of-climb indicators, time-of-flight clock, gauges, etc. Skefko Ball Bearing Co., Ltd.: pulleys, ball bearings. Simmonds Aero- cessories; lock nuts, floating strips. Superflexit, Ltd.: tubing. Sperry Gyro scope Co., Ltd.: automatic pilots, artificial horizon. Short & Mason, Ltd.: miscellaneous instruments. Serck Radiators. Ltd.: coolers, heaters. Geo. Salter & Co., Ltd.: springs. Triplex Safety Glass Co., Ltd.: Perspex window panels. Tecalemit, Ltd.: oil coolers. Vickers-Armstrong, Ltd.: cocks. Weston Electrical Instrument Co.: selector switches, air and oil temperature indi cators, cylinder temperature indicators, voltmeters, resistance bulbs. Wilmot- Breeden, Ltd.: cabin lights, locks, handles. Among the machine and other tools used in the production of the D.H.95 were the following: Archdale drilling machines; Brett drop hammer; British Oxygen Co.'s acetylene cutters for jig-making; Broom & Wade squeeze riveter; Consolidated pneumatic riveting guns; Cincinnati press brakes and guillotine (C. Churchill & Co., Ltd); Dean, Smith & Grace lathes; Desoutter mbblers and drills; Alfred Herbert multiple driller; Leon Hure milling machines (Rudolf Kahn); Jackman portable grinders; Myers riveting clamps; Pollard drilling machines; Henry Pels nibbler; Thiel machine saw (E. H. Jones Machine Tools, Ltd.); Warner & Swasey turret lathes (A. C. Wickman, Ltd.); Wotan shaping "machines (Soag Machine Tools Ltd.). A D.H. Year AT the company's annual general meeting, Mr. A. S. Butler, the chairman of the De Havilland Aircraft Company, in reviewing the design development progress during 1938, made,several statements of general interest. For instance, he said that the Moth Minor was now in quantity production, and that it should be possible for deliveries to'start in one or two months. The first six of the production Minors had been reserved as demonstrators for the overseas D.H. companies. The Gipsy Minor engine had, he said, passed its type tests and was also going into large-scale production. The company had had a very large number of enquiries concerning this engine. . During the previous nine months the Airscrew Division had been preparing for the production of the full-feathering constant-speed Hydromatic airscrew, and this type would be fitted to the D.H.95 as soon as it was available. With such a type the full-feathering characteristics would materially increase its single-engined performance. The company's Northern Airscrew Division at Bolton had completed its first full year's working. Mr. Butler stressed the fact that in due course the whole- time efforts of military aircraft constructors would not be re quired and a considerable force would then be released in the civil field. He felt that the company had to safeguard its own position by remaining well ahead in civil design and in making a special study of customers' requirements. The 95 should meet a demand for present-day operations. The company showed a net profit during the year, after reduction of the National Defence Contribution and balance of income tax, of nearly ^153,000, as against the figure of ^122,000 for the previous year. frm. NEXT EMPIRE AIR FORCES WEEK: NUMBER .
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
