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Aviation History
1929
1929-1 - 1035.PDF
FLIGHT, SEPTEMBER 6, 1929 CORRESPONDENCE The Editor does not hold himself responsible for opinions expressed by correspondents. The names and 'addresses of the writers, not necessarily for publication, must in all cases accompany letters intended for insertion in these columns^] "1 THE "MARTLET" UNDERCARRIAGE [2207] Our attention has been drawn to a statement in your description of the " Martlet " light 'plane in this week's issue of FLIGHT, in connection with the undercarriage. We are afraid that an error has crept into your description of this component, as this company had nothing to do with the design of this undercarriage, nor indeed with any part of the " Martlet " which was designed and built entirely by Southern Aircraft, Ltd. Further, the design was com- pleted and construction well advanced before this company commenced operations at Shoreham. We would be glad, therefore, if you would bring this fact prominently before your readers, in justice to our good friends, Messrs. Southern Aircraft, Ltd., whom we heartily congratulate on their latest product. We think that the error must be due to confusion with our " Hobo " light monoplane which you saw on the same day as the " Martlet." We are very anxious to remove any misapprehension on this point, and will be grateful if you will draw attention to this error at your earliest opportunity. THE HENDY AIRCRAFT CO., B. B. HENDERSON. Shoreham Aerodrome, August 30, 1929. ffi £ 9 W Hanworth—(Concluded from page 987.) the disposal of all the older clubs and our growing body of private owners—should reduce the cost of aircraft, lower rates of insurance, and stimulate the public demand for the benefits of aviation everywhere. It will reducethe cost of aircraft and help all who do not happen to be in the organisation. " The enterprise is not only national but Imperial. I congratulate CaptainGuest on his African enterprise. Africa is an excellent choice as the first point to attack, but I have a dozen other places for him to go to. " National Flying Services, Ltd., are going to combine business withpleasure, as they can use their fleet economically. The results of their activity ten years hence cannot be assessed today; but we can confidentlyclaim that by that time we shall have moved well along the road towards becoming a Nation of Airmen—and in this movement National Flying Ser-vices should have played a very big part." Speaking of the camaraderie of the air Sir W. Sefton Branckersaid "we havewith us today Professor Theororides, Director of Civil Aviation in Greece. He has just come back from a fifteen days' trip in Europe and he can tell youhow the spirit of camaraderie throughout Europe is helping the growth of civil aviation. The National Flying Services are going to extend the brother-hood and make our prestige good in those countries. (Applause.) " I congratulate Captain Guest and all the staff on what they have doneup to date, and I wish them the best of luck in the future." M M m ^ Calcutta Flying-Boat for FranceTHE French Ambassador and Assistant Naval Air Attache had a trial trip in the Calcutta which Short Bros,have built for the French Government, when they visited Rochester on Tuesday, September 3.Cologne to London in 145 Mins. A FAIREY-NAPIER machine returning from demonstrat-ing before the Greek Government, covered the distance be- tween Cologne and London in 145 mins., which is claimedto be a record. Portuguese Naval MissionA PORTUGUESE Naval Mission, composed of Major M.Carvalho, Assis.-Director of Naval Aeronautics, Air Lieuts. Viana and Oliveira, has left Lisbon for England in order topurchase naval aircraft. Miles and Miles of Hendersons As considerable confusion appears to be prevalentconcerning the identity of several personalities with similar names in the aircraft world, it may be useful to elucidatethe position for the benefit of readers of FLIGHT. First,we have Col. G. L. P. Henderson, who is the proprietor of the Henderson Flying School at Croydon. Col. Henderson isalso the Henderson of Glenny & Henderson, of Byfleet, the constructors of the little Glenny & Henderson '*' Gadfly "monoplane which was exhibited at Olympia. At Shoreham is located another Henderson, Mr. Basil B. Henderson,managing director of the Hendy Aircraft Co., which firm has now nearing completion a little light monoplane, to beknown as the Hendy " Hobo." Mr. B. B. Henderson's chief engineer is Mr. H. A. Miles, not to be confused with Mr. F. G.Miles who is managing director of Southern Aircraft, Ltd., also situated at Shoreham aerodrome. Mr. F. G. Miles, ofS.A.L., does a considerable business in joy riding, and also carries out work of reconditioning old aircraft, as well asextensive modifications such as that which has resulted in the " Martlet," described and illustrated elsewhere in thisweek's issue. K.L.G. Plug ExperimentsK.L.G. SPARKING PLUGS, LTD., have been conductingextensive experiments with aviation sparking plugs for the last two years, and have now developed a range of miniatureplugs which has already received a large measure of approval and success. The outstanding feature of this new range is thesmall overall length and the very considerable reduction in weight. The 550 is a third smaller than the well-known F.I2,while its weight is only 50 per cent, of the latter. On a 12- cylinder engine, using two plugs per cylinder, the actualsaving in weight achieved by the use of these new plugs is over 3£ lbs. While the general form of the inside of these plugs iscomparable to that of the older series, their construction intro- duces many new features. The central electrode is now madein a special alloy steel and the firing point is formed integral with it. The actual insulation, as in the F. 12, consists of over-lapping wrappings of sheet mica—these wrappings being pro- tected by washers of mica compressed together and polishedon their edges to form a smooth surface on the insulated centre. The central electrode, with its insulating wrapping,carries about its centre a steel ring which is compressed on to the electrode and, subsequently, into a gland nut. This ringensures a high degree of gas-tightness which is maintained throughout the life of the plug. It is interesting to note thatthese small plugs were used both in the " Napier " engine of the Fairey monoplane for the R.A.F. non-stop flight toIndia—4,130 miles in 50 hrs. 38 mins.—and in the Bristol- Jupiter engine of the machine piloted by Captan Barnardfor the Duchess of Bedford's record return flight to India in 7\ days. m * m m PUBLICATIONS RECEIVED Aeronautical Research Committee Reports and Memoranda :No. 1221 (M. 61). The Effect of Stress upon the X-ray Reflec- tions from Tungsten Wire at Air Temperature. By H. L. Coxand I. Backhurst. January, 1929. Price 9d. net. H.M. Stationery Office, Kingsway, London, W.C.2. Amendment List No. 4 to Air Publication 1208. June,1929. Airworthiness Handbook for Civil Aircraft. H.M. Stationery Office, Kingsway, London, W.C.2. Price Is. 6rf.net. Weather and the Airplane. By Edward H. Bowie. TheDaniel Guggenheim Fund for the Promotion of Aeronautics, Inc., 598, Madison Avenue, New York. AERONAUTICAL PATENT SPECIFICATIONS (Abbreviations.' Cyl. = cylinder; i.e. = internal combustion ; m. = motor. The numbers in brackets are those under which the Specifications w illbe printed and abridged, etc.) APPLIED FOR IN 1928 Published September 5, 1929 13,211. G. DE HAVILIAND, A. E. HAGG and DE HAVILLAND AiRCRAFr Co., LTD. Controls of aircraft. (316,920.) t •13,663. J. C. SAVAGE. Apparatus for use in the formation of trials of visible luminous or poison-laden material from aerial craft, etc. (290,666.) (22,265. BARR AND STROUD, LTD., and A. BARR. Plotting maps from air photographs. (317,216.)22,445. M. A. KENNEY. Aeronautical landing field. (299,699.) 23,901. DORNIER METALLBAUTEN GES. and DR. C. DORNIER. Aircraft. (298,187.)26,850. G. L. R. J. MESSIER. Brake control system. (297,429.) 29,683. G. LOENING. Airplane floats. (299,046.) FLIGHT. The Aircraft Engineer and Airships 36. GREAT QUEEN STREET, KINGSWAY, W.C.2, Telephone: Holborn 3211. Telegraphic addreis : Truditur, Westcent, London. " FLIGHT " SUBSCRIPTION RATES UNITED KINGDOM s. d. 3 Months, Post Free 7 7 6 „ „ ..15 2 12 „ „ ..30 4 ABROAD* 5. d. 3 Months, Post Free 8 3 6 „ „ ..16 6 12 „ „ ..33 0 • Foreign subscriptions must be remitted in British currency. Should any difficulty be experienced in procuring " FLIGHT " from local newsvendors intending readers can obtain each issue direct from the Publishing Office, by forwarding remittance as above. Cheques and Post Office Orders should be made payable to the Proprietors of " FLIGHT " 36, Great Queen Street, Kingsway, W.C.2, and crossed Westminster Bank. T94
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