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Aviation History
1931
1931 - 1194.PDF
FLIGHT, NOVEMBER 6, 1931 AIR POST STAMPS By DOUGLAS ARMSTRONG London-Capetown Air Mail EVERY aero-philatelist will want to have a few covers inthe first through air mail from London to the Cape, which is scheduled to leave some time in December. Indeed, itis safe to say that a large proportion of the mail in either direction will be sent by collectors of " first flight " covers,as was the case with the inaugural flight to Tanganyika last February. Consequently it will be some considerabletime before such items command more than a few shillings each in the open market. Covers flown on the interme-diate stages are likely to prove the more profitable invest- ment on account of the smaller numbers carried, andalthough at first the demand may be limited, they will un- doubtedly appreciate with time, like the South African"intermediates" of August, 1929. Special facilities are being provided for air post collectorsby Imperial Airways, Ltd., in connection with both the outward and inward flights. Envelopes of distinctive de-sign have been prepared, and are obtainable from the Publicity Department, Victoria Station, London, S.W.I,at the rate of Id. each, or 5s. per 100, and a fee of 3s. will be charged for handling batches of covers not exceed-ing 20 in number and all addressed to one destination. The route from Kismu (Kenya) southwards will be byway of Nairobi, Moshi, Dodoma, Mbeya, Mpika, Broken Hill, Salisbury, Bulawayo, Pietersburg, Johannesburg,Kimberley, Victoria West and Capetown. Rates of air postage have been tentatively fixed at 9d. per | oz. as faras points in Northern and Southern Rhodesia, and Is. to South Africa generally. All covers intended for despatch by the first flight mustbe in the hands of Imperial Airways, Ltd., not later than midday on Saturday, November 14, 1931.Air Stamps of New Guinea Although the air post service in this distant part of theEmpire has only been in operation for a few months, a second series of air mail stamps was taken into use at thebeginning of August last, this time in the form of the special issue commemorating the tenth anniversary of theAustralian mandate and depicting a Bird of Paradise in its native haunts, with the addition of the "world's "AirMail " and an aeroplane in outline, overprinted in black. There are fourteen values in all, ranging from £d. to £1,the former denoting the supplementary rate upon news- papers over 6 oz. in weight despatched by air to the gold-fields of Morobe. Air post letters cost 3d. per oz., and parcels are carried at the rate of 6d. per lb., the highervalues being required for particularly heavy packages, since practically all necessities are now conveyed by airpost, which takes only 40 minutes in transit compared with eight days by native carriers.From the West Indies New issues of air post stamps have lately arrived simul-taneously from two of the West Indian republics. Supple- menting the set for international air postage introducedearlier in the year, Cuba issued, on or about August 15, three denominations intended for use in the internal airservice only, in a handsomely engraved design showing a tri-motor plane passing over a tropical valley and in-scribed " Correo Aereo Nacional " (instead of " Inter- nacional "), viz., 10 centavos black, 20 c. carmine and 50 c.blue. About a week later the Dominican Republic intro- duced a complete new series of air mail stamps in six de-nominations depicting an aeroplane flying in the sun, in conjunction with an ancient sun-dial bearing the inscription," Cuadrante Solar, 1753," which was erected in that year near the old government palace on the Calle Colon. Thevalues, colours and numbers printed of these stamps are as follow:—10 centavos carmine (100,000), 15 c. lilac(50,000), 20 c. blue (50,000), 30 c. green (50,000), 50 c. marone (50,000) and 1 peso orange-red (30,000).Latest Dutch Air Stamp Coincident with the institution of a weekly air mail ser-vice between Amsterdam and Batavia (Dutch Indies) a 36 cents stamp was issued by the Dutch post office forprepayment of the reduced rate of postage upon 5 gramme letters conveyed over this line. Apart from two vignettesillustrating flights of aeroplanes passing in different direc- tions over the head of Queen Wilhelmina, it bears no indi-cation of the special purpose for which it has been pro- vided. Printed by photogravure process in blue andorange, it is the work of the Dutch artist Piet Zwart te Wassenaar. PUBLICATIONS RECEIVED Aeronautical Research Committee Reports and Memo-randa: No. 1376 (Ae. 501—T. 1892, T. 2084). Strength of Wooden Seaplane Hulls. By W. C. S. Wigley. March1924. Price Is. net. No. 1389 Ae. 511—7. 3048). The Pressure on the Front Generator of a Cylinder. By A.Thorn. December, 1930. Price 9d. net. No. 1390 (M. 73—A. 65, 74, 92). The Protection of MagnesiumAlloys against Corrosion. By H. Sutton and L. F. Le Brocq. July, 1930. Price Is. net. No. 1392 (Ae. 513—T. 3064). Accelerations on Aircraft during Manoeuvres. By E. Finn and A. E. Woodward Nutt. December, 1930.Price 9d. net. No. 1393 (Ae. 514—T. 3003). Several Cases of Non-Circular Torsion Solved by Analysis andDirect Test. By J. Orr. September, 1930. Price Is. 3d. net. London: H.M. Stationery Office, W.C.2. Dynamics of Airplanes and Airplane Structures. Com-piled by J. E. Younger and B. M. Woods. London: Chapman & Hall, Ltd. Price 17s. 6d. net. Aeronautical Research Committee Reports and Memo-randa: No. 1355 (/fe.486-7\2606, T.3011). Experiments on Models of a Compressed-Air Wind Tunnel. Compiledby R. Jones and A. H. Bell. April, 1928. Price Is. 3d. net. London: H.M. Stationery Office, W.C.2. Aeronautical Research Committee Reports and Memo-randa: No. 1394 (v4e.515-r.3078). A Study of Slots, Rings and Jet Control of the Boundary Layer. ByH. C. H. Townend. February, 1931. Price Is. 9d. net. London: H.M. Stationery Office, WT.C2.Aeronautical Research Committee Reports and Memo- randa: No. 1373 (4e.499-7\3096). Ventilation of 24-//.Wind Tunnel. By B. Lockspeiser. February, 1-931. Price 9d. net. London: H.M. Stationery Office, W.C.2.Principles of Flight. By E. A. Stalker. The Eonald Press Company, New York. Price $6.The Journal of the Royal Air Force College. Vol. XI, No. 2, 1931. London: Gale & Polden, Ltd. Annualsub., 8s. m m m m NEW COMPANY REGISTERED THOS. COOK AND SON WAGONS-LITS (SOUTH AFRICA), LTD.,40, Stratton Street, Berkeley Square, W. 1.—Capital £20,000, in £1 shares. Acquiring the business of tourist and shipping agents and kindred businessescarried on in the Union of South Africa as " Thos. Cook and Son," organisers of travel by land, water or air, etc. AERONAUTICAL PATENT SPECIFICATIONS Abbreviations: Cyl. = cylinder; i.e. = internal combustion; m. = motors(The numbers in brackets are those under which the Specification will be printed and abridged, etc.). APPLIED FOR IN 1930 Published November 5, 1931 19,709. C. H. WOODWARD. Speed-indicators for aircraft. (358,429.) 31,730. A. CLEMENTI and AKT.-GES. C. P. GOERZ OPTISCHE ANSTALT.—Device for determining speed and direction of course of aeroplanes. (358,742.)36,318. H. JUNKEKS. Driving mechanism for aircraft propellers. (358,789.) APPLIED FOR IN 1931 Published November 5, 1931 2,515. Soc. DE FABRICATIONS INDUSTRIELLES. Calculating device foraerial navigation. (358,835.) 14,567. R. BRATU. Multi-engined aeroplanes. (358,867.) FLIGHT, The Aircraft Engineer and Airships. 36, GREAT QUEEN STREET, KINGSWAY, W.C.2. Telephone (2 lines): Holborn, 3211. Holborn, 1884. Telegraphic address: Truditur, Westcent, London. SUBSCRIPTION RATES POST FREE UNITED KINGDOMs. d. 3 Months 8 36 16 6 12 ,, 33 0 UNITED STATES 3 Months $2-206 „ $440 12 „ $875 OTHER COUNTRIES*s. d- 3 Months 8 96 „ 17 6 12 „ 35 0 * Foreign subscriptions must be remitted in British currency. Cheques and Post Office Orders should be made payabUto the Proprietors of " FLIGHT," 36, Great Queen StreetKingsway, W.C.2, and crossed " Westminster Bank." Should any difficulty be experienced in procvrinl" FLIGHT " from local newsvendors, intending readers canobtain each issue direct from the. Publishing Office, by /of" warding remittance as above. 1118
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