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Aviation History
1925
1925 - 0282.PDF
AIR MINISTRY NOTICES NOTICE TO AIRMEN Index, April 29, 1925IT is notified that the Index dated November 8, 1924, is cancelled and a new one issued as above, giving list ofCancelled Notices, Operative Notices and General Notices, including all foreign regulations, etc. NOTICE TO GROUND ENGINEERSIndex IT is notified in No. 3 of 1925, that the following Noticesto Ground Engineers are cancelled :— 1920.—Nos. 2, 6, 7, 13 and 17.1921.—No. 10. 1922.—Nos. 5 and 9. Operative NoticesTHE Notices to Ground Engineers remaining in force at this date are listed in Notice No. 3 of 1925.Ground Engineers and others in possession of the Notices should check their sets and, if they find them to be incomplete,should apply for the Notices which are missing to :—The Secretary (D.D.A.T.), Air Ministry, Kingsway, London,W.C.2. No. 3 of 1925. A NEW ROLLS-ROYCE CAR CONSIDERABLE interest attaches to the introduction, by Rolls-Royce, Ltd., of a new 40-50 h.p. car chassis which has an entirely new overhead valve engine. This chassis, so far asthe transmission of the power from the clutch to the back axle is concerned, is exactly similar to the " Silver Ghost "model (also of 40-50 h.p.), which has been the standing con- struction of the famous Derby firm for many years. It is tobe known as the " New Phantom " model. The four cylinders are arranged in two blocks of threecylinders, with a single detachable combustion head, which carries the rocker-operated inverted valves, the rockers beingoscillated by enclosed vertical push-rods lifted by plungers from the enclosed side camshaft driven by helical toothed gearing. The bore of the cylinders is 4^ ins. and the piston travel 5£ins., as against a bore and stroke of 4£ ins. and 4| ins., res- pectively, of the " Silver Ghost " model. The volume sweptof the new model is 7,668 c.c, as against 7,410 c.c. The transmission of the power to the standard type ofRolls-Royce gear-box and rear transmission is by a new single-plate clutch running dry and a Hardy type disc universaljoint between the clutch-driven shaft and the primary shaft of the gear set. The ignition is dual by Watford magneto,and by battery and coil and accumulator. A separate set of plugs are used for each ignition. The lubrication is by a submerged gear pump, which forces011 to the main and subsidiary bearings of the engine. It operates through a three-way reducing distributor, whichallows of the oil at full pressure being forced to the crank- shaft and big ends. The electrical installation works at12 volts pressure ^.nd, like the ignition, is of Rolls-Royce manufacture and design.With four-wheel brakes, shock-absorbers, detachable wire wheels with Dunlop straight-sided cord tyres, 33 ins. by5 ins., and a wheel-base of 12 ft. rnd a track of 4 ft. 8 ins., the complete chassis costs /1,850. Orders are being taken now,and deliveries will commence in 14 weeks' time. The makers arc Rolls-Royce, Ltd., of Derby, and the new chassis can beseen at the company's showrooms at 15, Conduit Street, London, W.I. British Engines in GermanyIT is gratifying to note that in the forthcoming big German competition, the Deutscher Rundflug, British engines willbe well represented. At least five of the entries amongst the higher-powered aircraft are fitted with Bristol "Lucifer"engines, whilst in the lower categories there will be found A.B.C., Blackburne, and Douglas engines fitted to many ofthe entries. Inst. Aeronautical EngineersWE would remind our readers that the last meeting of the current session of the Institute of Aeronautical Engineerswill take place at the Engineers' Club, Coventry Street, London, W.I, on May 8, at 6.30 p.m., when Capt. W. H.Sayers will read a paper on " Lessons of 1924." R.A.F. Wins Chadwick Prize THE Chadwick Trustees announce that the prize of /100and the gold medal for " specially assisting in promoting the MAY 7, 1925 more than any other officer in recent years to promote thehealth of the men of the Royal Air Force." The award is made once in five years to a medical officer of one of theServices. Air Services Across Germany LIEUTENANT-COLONEL EDWAKDS, Deputy-Director of theAir Transport Department, and Mr. F. G. L. Bertram, Prin- cipal of the Civil Aviation Department of the British AirMinistry, will return to London on Monday, their negotiations with the German Ministry of Communications on mattersrelating to air traffic having led to satisfactory results. It is stated also that the air service between Britain and Germanywill be continued in the future. m m m m ' SOCIETY OF MODEL AERONAUTICAL ENGINEERS (London Aero-Models Association) COMPETITIONS for the Model Engineer No. 1 Challenge Cupand the Western Challenge Cup, both of which are open to all. will be held at Slid bury on Saturday, May 16, at 3.30 p.m.Entrants should notify the Competition Secretary, Mr B. K. Johnson, of 46, Norton Road, Wembley, Middlesex, titthe earliest possible moment. A. E. JONES, Hon. Secretary K $ £ «SIDE-WIND THERE are not many aviation events—no matter in whatpart of the world they happen—in which the famous Shell spirit does not play an important part. For instance, welearn that this fuel has been selected for the recently formed air mail service between Cape Town and Durban, which cutsdown the time between these two points from 48 to 8 hour*. Incidentally, it may be of interest to note that Shell-Mex,Ltd., supplied the lubricating oil (Shell " All's Well ") to His Majesty's yacht Victoria and Albert at Genoa on theoccasion of His Majesty's recent cruise. m m m m PUBLICATIONS RECEIVEDTechnical Notes : No. 213.—Discharge Characteristics r>f a High-Speed Fuel-Injection Engine. By R. Matthews.February, 1925. No. 214.—Note on the Katzmayr Effect on Airfoil Drag. By S. Ober. February, 1925, ~No. 215.The Calculation of Wing Float Displacement in Single-Float Seaplanes. By E. P. Warner. March, 1925. U.S. NationalAdvisory Committee for Aeronautics, Washington, D.C., U.S.A. Catalogues Calcolo della Navicella e degli Organi Accessori nei DirigibiliSupplemento ai Rendiconti Tecnici. By Ing. R. Verduzio. Direzione Superiore del Genio e delle Costruzioni Aeronautiche.Viale Giulio Cesare, Rome. m m m m AERONAUTICAL PATENT SPECIFICATIONS Abbreviations: Cyl. — cylinder I i.e. — internal combustion ; m. — motorThe numbers in brackets are those under which the Specifications will be printed and abridged, etc.APPLIED FOR IN 1923. Published May 7, 1925.30,857. H. LEIT.VF.R. Screw propellers. (231,919.) APPLIED FOR IN 1924.Published May 7, 1925. 11,875. T. WHITING. Wire strainer. (232,052.) FLIGHT ~~ The Aircraft Engineer and Airships 36, GREAT QUEEN STREET, KINGSWAY, W.C. 2.Telegraphic address : Truditur, Westcent, London. Telephone : Gerrard 1828. SUBSCRIPTION RATES " FLIGHT " will bt forwarded, post free, at the following ratts i— UNITED KINGDOM ABROAD*s. d. 3 Months, Post Free.. 7 76 , 15 2 12 „ „ ..30 4 * Foreign subscriptions must bt remitted in British currency. Cheques and Post Office Orders should be made payable to theProprietors of " FLIGHT," 36, Great Queen Street, Kingsway,W.C.2, and crossed London County and Westminster Bank, otherwise no responsibility will be accepted. Should any difficulty be experienced in procuring " FLIGHT " 3 6 12 Months, Post Free. m s.. 8 .16 .33 d. 3 6 0 health of the men " of the Service to which he belongs has from local newsvendors, intending readers can obtain each issue been awarded to Wing-Commander Harold E. Whittingham, J' ""' '" "•' n-.n.-.,..-.._ r,a:.. T... r J.- „.«— R.A.F.M.S., who " by his work on sand-fly fever has done direct from the Publishing Office, by forwarding remittance as above. 282
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