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Aviation History
1935
1935 - 0505.PDF
MARCH ", 1935- FLIGHT. 245 \T t we cross Lake Como, looking down through holes • ^ loud on to Bellagio ; the mountain barrier here is over if ft high. Our next lake is that of Lugano, above hicb we enjoy some circling, and anon, leaving Bellin- zona on our right, we begin climbing up the mountain •all that bounds the Leventina, down which valley runs th Ticino River. We leave red-roofed Airolo far below on our right; crossing the St. Gothard Pass (6,900 ft.), a Swiss "prohibited area," is not legal. Accordingly, we have to surmount the main Alpine barrier, to find our selves anon above the Furka Pass at about 10,500 ft., with the spectacle of the source of the Rhone to regale us. We now cross the Grimsel Pass and fly fast down the Haslithal, past Meiringen, over the head of the Lake of Brienz and the crest of the Brienzer Rothorn, and soon arrive at Belp. We have been two hours forty-eight minutes covering the distance between the Lido and the Berne aerodrome. The total flight of some 1,100 kilometres is one of the most beautiful to be enjoyed in Europe, but in the case of a single-engined machine the engine must be above reproach! A POWERFUL RADIAL The Siddeley ''Tiger IV" : Normal Power of 700 b.h.p. Developed at 2,150 r.p.rn. and 5,000 ft. THE latest and most powerful model in the range of aero engines produced by Armstrong Siddeley Motors, Ltd., to be standardised for military aircraft is the "Tiger IV," a fourteen-cylinder double-row air-cooled radial, which, it may be remembered, is the power-plant used in the Blackburn " Shark," a detailed illustrated description of which was published in Flight of December 13, 1934. Like all Siddeley types, the "Tiger" is a radial air-cooled engine, with its fourteen cylinders arranged in two rows of seven, one row behind the other and staggered in relation to it. The crankshaft is of the two-throw type, each crank pin carrying the big end of a master connecting rod, to which are attached the six auxiliary rods. Of the moderately supercharged type, the "Tiger IV" is designed to give its rated normal power of 700 b.h.p. at an altitude of 5,000 ft. The induction system incorporates a geared fan, the ratio of which is 5.88 to 1. Two alternative airscrew reduction gear ratios are provided, one 0.594 to 1 and the other 0.657 to I. With a bore of 5.5 in. (139.7 mm.) and a stroke of 6 in. (152.4 mm.), the swept volume is 1,996 cu. in. (327 litres). A maximum power of 744 b.h.p. is developed at 2,450 r.p.m. and 6,000 ft. The weight of the engine, completely equipped, is 1,200 lb. (545 kg.). Clean external design is a feature of the " Tiger IV " A Jubilee Rally In connection with the Jubilee celebrations, the Roval Aero Club hopes to arrange the biggest rally of civil aircraft yet held. Invitations will be issued to every aircraft manufac turer, air line, school, club and private owner. It is probable tnat the date will be as close as possible to the Empire Air "ay. May 25, and that the rally will be held near London. The Qreek Revolution Aircraft of the Greek Air Force have been carrying out active tin gainst the warships which were seized bv the revolu- lonanes—according to some reports, with effective results- while the Junkers air liners employed on the Greek air services are being adapted for bombing the rebel forces. As a result of the rebel occupation of Crete, Imperial Airways machines have been diverted and will fly via Castebrosso. The service to Athens is maintained as usual. " Mercury," not " Pegasus " In the notes on the new Bristol day and night fighter mono plane last week it was inadvertently stated that this machine is fitted with the Bristol "Pegasus" engine. The engine is, of course, a Bristol "Mercury," which has a slightly smaller overall diameter and is, therefore, particularly suitable for high-speed military aircraft. Mar. 9. Mar. 12. Mar. 12. Mar. is. Mar. 15 Mar. 16. Mar. 20. Mar. 23. Forthcoming Events Club Secretaries and others are invited to send particulars of important fixtures for inclusion in this list Mar. 29. Club Dinner, Grand Hotel, Northampton Aero Northampton. Future of Air Defence." Debate led by Capt. N. Macmiltan, at Women's Engineering Society, 20, Regent St., London. Kecent Developments in the Lighting of Airways and Aerodromes." Joint R.Ae.S. and Illuminating engineering Soe. Lecture, Inst. M.E., Storey's Gate. Westminster. New Developments of the Autogiro." R.Ae.S. Lec- ,'ure pv Senor Juan de la Cierva. D1U .„,nner and Dance. Cinque Ports Flying Club, Royal Pavilion Hotel .Folkestone. ,„""; and Dance, Masonic Country and Flying Club. Ru,°haI General Meeting, R.A.F. Club. "goy : R.A.F. v. Army, Twickenham. Mar. 29 Apr. 12, R.Ae.S. Lecture by Aero Club. May May June. June June Aug. Sept. "Piloting Commercial Aircraft Sqn. Ldr. H. G. Brackley. Annual Dinner. Norfolk and Norwich Mousehold Aerodrome. "Commercial Aircraft." R.Ae.S. Lecture by Capt. G. de Havilland. (Date not yet fixed). Wilbur Wright Lecture, R.Ae.S. by Mr! Donald W. Douglas. Household Brigade Flying Club Night - Flyin-5 Demonstration, Heston. Brooklands " At Home." R.A.F. Flying Club Annual Display, Hatfield Aerodrome. Royal Air Force Display, Hendon. 24-25. Third International Flying Meeting Lympne. 6-7. King's Cup Air Race. 29 I. 15. 29.
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