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February , 1935 •18 AIRCRAF T ENGINEERING Instructions to Aeroplane Owners and Ground Engineer s on Essentia l Modifications No . 39 of the yea r 193 4 no further flying must be done with the engine No . 3 of the yea r 1935 until a crankshaft of th e later design has been Amendment List No. 41 t o th e Airworthiness One or two instances of gas lock in the fuel fitted. Handbook for Civil Aircraft (Air Publication system of Gipsy II I an d Gipsy Major engines The modifications described under paras. 1208) has been issued, and copies can be fitted with D.H.A.C. pumps, when operating in 1 (a) an d (c) of the firm's circular lette r must be obtained from His Majesty's Stationery Office, tropical countries, have been reported. This made not late r than January 20th, 1935, and Adastral House, Kingsway, W.C.2, or through defect only occurs following a flight and when the modification described under para. 1 (d) any bookseller, price 1d. net or 1½. pos t free. th e engines have been allowed to stand for a not later than March 25th, 1935. Certificates Attention is particularly directed to the short period before taking off again. of Airworthiness of the aircraft concerned will following amendments introduced by the above not be renewed and Ground Engineers must not amendmen t list. These modified requirements I t has been established, by experiment at sign Daily Certificates of Safety for Flight after will be applicable to new type aeroplanes or the constructors' works, that by reducing th e these dates, unless the respective modifications engines for which application is received after strength of the spring on th e fuel pump inlet have been satisfactorily embodied. the dates shown against each item. valve, this defect is minimised. Januar y 3, 1935. Date of The inlet valve spring Part No. A. 10-23 Ite m No. Description. Application No . 2 of th e yea r 1935 which has 12 coils is, therefore, to be discarded Airscrews to the undermentioned designs and replaced by a spring of th e same type and 238 Provision of fuel cocks 15th December have been approved for certain types of air strength as tha t used on the delivery valve ; craft, and additions should be made to th e this spring has 16½ coil s and is to Part No. 239 (i) Ranges of instruments 15th May appropriate Notices to Aircraft Owners and A. 10-28. Ground Engineers as follows :— 242 Windows and wind- 15th December Four small air ven t holes are to b e drilled in Drawing Issue Diameter Pitch screens for pilot's th e engine air scoop to assist in cooling th e No. No. in feet in feet Remarks cockpit pum p body and filter bowl in flight. (i) Add the following design to Notice No. 15 December 27, 1934. of 1931 :— The foregoing modifications should be made No . 1 of the year 1935 t o de Havilland Drawing No. S.K.4653. "WESTLAN D WIDGEON II I " AEROPLANES. The modifications to Gipsy Major engines on (c) With Hermes II Engine. These modifications should be embodied a s Dragon aeroplanes promulgated by Notices t o 7..139 .. .. 4 6·72 4·6 — soon as possible, and in no case later than Aircraft Owners and Ground Engineers Nos . (ii) Add the following designs t o Notice No. 11 three months from the dat e of this Notice. 36 and 38 of 1934, are hereby extended to such of 1933 :— engines carried in the wings on other multi "Fo x MOTH" (D.H.83) AEROPLANES. Certificates of Airworthiness of the aeroplanes engined types of aeroplanes . (b) With Gipsy Major Engine. concerned will be liable to suspension or can Messrs. do Havilland have issued a circular D.H.522(E .. — 6·33 4·92 — cellation if the modifications have not been D.H.5220/J .. — 6·33 4·92 — letter dated December 31st, 1934, under carried out within the above-mentioned period. 67 104.A/X10.. — 7·0 4·6 — reference AGB/2500, which gives full details Certificates of Airworthiness will not be renewed (iii) Add the following design to Notice of th e inspection operations and modifications an d ground engineers must not sign Daily No. 50 of 1933:— to be carried out. The instructions contained Certificates of Safety for Flight in respect of "DKAGON " (D.H.84) AEROPLANES. in this circular letter must be strictly observed. such aircraft after the expiration of this period (a) With Two Gipsy Major Engines. If, following the inspection described in unless the work has been correctly carried out. D.II.5232/B .. — 6·5 53 — Schedule I of the firm's circular letter, the crankshaft is found cracked or seriously fretted, Januar y 11, 1935. Januar y 11, 1935. The following list of contracts placed by the Filter Co., Ltd., Louden, S.W.—Pumps, Oleo : Air Ministry during December, 1934, is Vickers (Aviation), Ltd., Weybridge.—Pumps, AIR MINISTRY CONTRACTS extracted from the January issue of The Petro l Centrifugal : Drysdale & Co., Ltd. , Ministry of Labour Gazette :— Glasgow.—Pumps, Vacuum : Norman En Aircraft and Spares : De Havilland Air Ltd., London, S.E. — Engine, "Power," gineering Co., Bury.—Radiators : John Mar- craft Co., Ltd., Edgwar e ; Hawker Aircraft, Marin e Craft Spares : British Power Boat ston, Ltd., Wolverhampton. — Rectifiers, Meta l : Westinghouse Brake & Saxb y Signal Ltd., Kingston-on-Thames.—Aircraft, Repairs Co., Southampton.—Engines, Aero. : Arm Co., Ltd., Chippenham, Wilts.—Rubber, Ex and Spares : Short Bros. (Rochester and strong Siddeley Motors, Ltd., Coventry.— pande d : Expanded Rubber Co., Ltd., Wem Bedford), Ltd., Rochester. Aircraft Spares : Engines , Aero., and Spares : Bristol Aero. bley.—Saloon Cars : Morris Motors, Ltd., Airspeed, Ltd., Portsmouth ; Sir W. G. Co., Ltd., Bristol ; D. Napier & Son, Ltd., Cowley, Oxon.—Sextants : H. Hughes & Armstrong Whitworth Aircraft, Ltd., Coventry ; London, W. — Engines , Aero., Spares: Sons, Ltd., London , E.—Shirting, Cotton : Fairey Aviation Co., Ltd., Hayes, Middlesex ; British Thomson-Houston Co., Ltd., Coventry ; A. V. Roc & Co., Ltd., Manchester ; Westland Rolls Royce, Ltd., Derby; Short Bros. Fothergill & Harvey, Ltd., Manchester ; H. Aircraft Works, Yeovil.—Airscrews : Air (Rochester and Bedford), Ltd., Rochester.— Sharpies & Co., Ltd., Manchester.—Sights, Tai l Drift : Cooke, Troughton & Simms, Ltd., screw Co., Ltd., Weybridge ; A. V. Roc & Co., Fans , Ceiling: Crompton Parkinson, Ltd., York.—Sound Film : Gee Films, Ltd., Lon Ltd., Manchester.—Airscrews, Repair of : Chelmsford.—Fans, Test : Bristol Aero. Co., don, W.C.—Steel Wire : Glover Bros. (Moss- Fairey Aviation Co., Ltd., Hayes , Middlesex Ltd., Bristol. — Fil m : British Thomson- ley), Ltd., Mossley.—Suits, Combination : Cable, Paper Insulated : Derby Cables, Ltd., Houston Co., Ltd., London, W.C.—Furnace, J . Compton, Sons & Webb, Ltd., London, E. ; Derby.—Cable, Non-corrodible Steel : John Sal t Bath : Alldays & Onions, Ltd., Bir "Westcott " Overall Manufacturing Co., Ltd., Shaw, Ltd., Sheffield.—Cable, Towing : mingham. — Grinder , Cylinder: Churchill British Ropes, Ltd., Dagenham ; Dixon Corbitt, Machine Tool Co., Ltd., Manchester. — Egham.—Travellin g Bags : Irving Air Chute Ltd., Gateshead ; Halls Barton Ropery Co., Glycerine : Davi d Thorn & Co., Manchester.— Co. of G.B., Ltd., Letchworth ; R.F.D. Co., Ltd., Guildford.—Trollies, Seaplane Han Hull ; Whitecross Co., Ltd., Warrington.— Indicators , Wind Direction : Adam & Lane dlin g : Ernest Lake, Ltd., Bishops Stortford. Charge s for Fire Extinguishers : General & Neeve, Ltd., London, E.—Ladders, —Trouser s : L. Silberston & Sons, London, Fire Appliance Co., London, E.C.—Com Towe r : Ransomes, Sims & Jefferies, Ltd., E.—Tyre s : Goodyear Tyre & Rubber Co., pressors , Air : F. W. Bracket t & Co., Ltd., Ipswich. — Lamps , Filament: General Ltd. , Wolverhampton.—Uniforms, Bands Colchester; Siebe, Gorman & Co., Ltd., Electric Co., Ltd. , London, W.—Magnetos men' s : Hobson & Sons (London), Ltd., London, S.E.—Computors : H. Hughes & M/ T : Simms Motor Units, Ltd., London, N. — Son, Ltd., London, E.C.—Crane, Electric : Oil, Lubricating : Anglo-American Oil Co., London, S.E.—Wheels, Aero, Tyres and Cowans, Sheldon & Co. Ltd., Carlisle.— Ltd., London, W.C. ; Silvertown Lubricants, Tube s : Goodyear Tyre & Rubbe r Co., Ltd., Cylinders , Oxygen : Vickers-Armstrongs, Ltd., London, E. ; Frank How & Co., Ltd., Wolverhampton.—Wire Ropes : Glaholm & Robson, Ltd., Sunderland. Ltd., London, S.W.—Dinghies : C. E . Heinke, London, E.—Oil Renovators : Streamline
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Feb 1, 1935
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