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Aviation History
1931
1931 - 1274.PDF
FLIGHT, DECEMBER 4, 1931 " Panthers," and it will be observed that he proposes tomake use of such modern aids to drag-reduction as Townend rings. In other respects also the Shackleton machine is a re-markably " clean " looking design, and for the wing loadings and power loadings estimated it would seem likelythat the calculated top speed of 160 m.p.h. should be attained. Mr. Shackleton estimates that the cruisingspeed at 3,000 ft. should be approximately 130 m.p.h., which would be a great deal above the cruising speeds ofany commercial machines we have in service at the present time. The calculated tare weight of the machine is13,120 lb., and as the machine is stressed for a gross weight of 23,070 lb., the estimated disposable load becomes9,950 lb. As the wing area is 1,500 sq. ft. the wing loading becomes 15.37 lb./sq. ft., which Mr. Shackletoncalculates will give a landing speed with full load of 62 m.p.h. This is a figure considerably above what we Xmas Air Mail to the CapeTHE Postmaster-General announces that, in order to provide an opportunity for sending Christmas letters andparcels by air to South Africa, Northern Rhodesia and Southern Rhodesia, arrangements have been made withImperial Airways for the flight due to leave Croydon on December 9 for East Africa, to be extended to Capetown,and it is hoped that the mail will reach Khartoum on the 14th, Nairobi on the 16th, Dodoma (Tanganyika) onthe 17th, Broken Hill and Salisbury on the 18th, Bulawayo and Johannesburg on the 19th, and Kimberley and Cape-town on the 20th. The combined postage and air rates are: EachFirst succeeding are accustomed to, but, on the other hand, with a powerplant consisting of four engines, there should be. little risk of a hurried forced landing having to be made, so thatwhat with the chance of picking a suitable held and the use of the special undercarriage fitted with effective brakes,a landing speed of this order might be tolerated. For a gross weight of 23,000 lb. the power loading withfour engines running at maximum power is 10 lb./h.p. With one engine out of action this becomes 13.3 lb./h.p.,and with two engines stopped the power loading is 20 lb./h.p. With a wing loading of more than 15 lb./sq.ft. it seems a little doubtful whether the machine would keep up on two engines, but its rate of descent should atleast be very slow, and with three engines running, especi- ally in view of the placing close together of the engines,flying on should present no difficulty. It is estimated that the initial rate of climb will be 1,100 ft./min., andthat the ceiling should be about 19,000 ft. Letters Sudan Kenya, Uganda, Tan- ganyikaZanzibar, Northern & Southern Rhodesia .. South Africa \ oz.5d. 7d. 9d. Is. Od. 4d. 6d. 8d. Is. Od. Parcels, 4s. 6d. per 6s. Od. per 7s. Od.'per 7s. Od. per lb. lb. lb. lb. The latest time of posting for letters in the air mailletter box outside the G.P.O., London, will be 11.0 a.m. on December 9 ; and for parcels 9.0 p.m. on December 8 atthe G.P.O., London, and correspondingly earlier elsewhere. The first regular outward mail leaves Croydon on January20, and the first homeward mail leaves Cape Town on January 25. Australian Xmas Air Mail MISFORTUNE has overtaken the Australian NationalAirways Avro 10 Southern Sun, which left Darwin on November 23 with mails for England. Leaving Bataviaon November 25 the machine flew to Singapore and Alor Star. When taking off the following morning, however,the Southern Sun, which was heavily loaded, crashed into a paddy field just outside the aerodrome. The machinewas completely wrecked, and Col. Brinsmead, Australian Controller of Civil Aviation, who was a passenger, wasslightly injured, but the pilot, Mr. G. V. Allan, and second pilot, Mr. B. S. Calligan, were unhurt. At first it wasreported that the mails would be sent on to England by the P. & O. liner Kashgar, but subsequently it wasannounced that Air Commodore Kingsford Smith would set out from Sydney for Alor Star in the Southern Star,which would resume the flight to England with the mails. He left Sydney on November 30. Northern Air Lines, Ltd.A SEASON of bad flying weather has brought Northern Air Lines, Ltd., to a difficult financial situation. Thestaff at Manchester airport has been cut down by 50 per cent.—the pilots being reduced from 13 to three—andMr. L W. Shepherd has been appointed receiver to the company which controls Northern Air Lines, a companyknown as Northern Air Transport, Ltd. At present the activities of the company are being carried on, but thefuture of the company is uncertain. HANGING ON THE ANTI-LIFT WIRES: Captain Hubert Broad doing inverted flying on one of the new "Tiger Moths." The first of a batch of these machines have already been delivered to the R.A.F. Flying Training School at Grantham. (FLIGHT Photo.)
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