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Aviation History
1934
1934 - 1252.PDF
T254 FLIGHT. NOVEMBER 22, 1934. £ • e y An inverted " W"type: The Farman WIrs of 600 h.p. 2,200 r.p.m. at 11,480ft., and 710 h.p.at 2,530 r.p.m. at 14,100ft. An Alfa Romeo variable-pitch three-bladed air-screw is fitted. Also on this stand is the "Alfa" D/2C nine-cylinder radialwhich gives 310 h.p. at 2,200 r.p.m. at 8,100ft. A neat little radial of 180 h.p. is ex-hibited on the stand of the Compania Nazionale Aeronautica. It weighs275 lb, and delivers its normal power at 4,800 r.p.m. Four altitude records,two for seaplanes and two for land- planes, have been broken recently by Amongst the "Argus" types is theAs.8B. inverted four-cylinder engine of 125 h.p., developed from an engine usedsuccessfully in the Challenge de : Tourisme International, weighing 454 lb.Another "Argus" type, the As.loC inverted air-cooled " V," gives 200 h.p.at cruising r.p.m. and a maximum of 240 h.p, It is a neatly designed enginesuitable for installation in three- or four- seater touring aircraft. The third"Argus" type is the As. 17A, of 200 h.p., which has a bore of 120 mm. anda stroke of 130 mm. This is an in- verted six-cylinder engine having an ex-ceptionally well shaped crankcase which lends itself to the use of an efficientengine cowling. One of the widest range of engines inthe Salon is to be found on the stand of the Walter Co. Three of the enginesare inverted-in-line types, these being the "Major" 6 (185-200 h.p.), the"Major" f (120-130 h.p.), and the "Minor" 4 (75-85 h.p.). "Gipsy"influence is apparent. The other Walter types are radials and include the five-cvlinder " Regulus " II (185-250 h.p.), nine-cylinder " Gemma" I (150-165h.p.), seven-cylinder "Castor" II (260-340 h.p.), and the nine-cylinder"Pollux" III-R (420-550 h.p.), which seems small and neat for an engine ofits power. A '' Stella'' Xrc is shown by thePiaggio Co. Its most striking feature is the two-speed supercharger. At groundlevel, with the supercharged in first A 14 - cylinderradial of 900 h.p. The Gnome-Rhone " Mistral Major" or K.14,which is being fitted in machinesranging from single-seaterfighters to heavy bombers. speed, the power of the engine is 650h.p., and at 16,400ft., with super- charger in second speed, the engine de-livers 600 h.p. Actually it is claimed that 700 h.p. is available for take-off.The weight is 970 lb. A Pratt and Whitney " Hornet," builtunder licence by the Fiat Co., and known by them as the A.29R, is exhibited. Itgives 700 h.p. at 2,150 r.p.m. at 6,560ft. The A.70S, of 200 h.p., is a seven-cylinder radial showing distinct Ameri- can influence on cylinder design. Thisengine was fitted in various Italian machines for the last Rundflug. Inter-cylinder baffles are provided for use in long chord ring cowlings. The Alfa Romeo Company is showingits 125 R.C. engine, which is a Bristol "Pegasus" built under licence in Italy.The example •shown gives 650 h.p. at The geared and supercharged Italian FiatA33 RC of 700 h.p. machines fitted with this engine.The stand of the U.R.S.S. contains a small seven^cylinder radial of conven-tional design known as the M.48 and rated at 200 h.p. Water'cooled Engines WHEN the Rolls-Royce "Kestrel"engine, or "F" type, as it was then known, appeared four or five yearsago it created a considerable stir, on the Continent. Ever since then it has beenheld in high esteem in Europe, and the latest version of this unit, the '' Kes-trel" VI, which is the main exhibit on the Rolls-Royce stand, is consequentlyproving a great attraction. Continental visitors are specially inter-ested in the composite cooling system developed for this engine. As explainedin our description of the '' Kestrel'' last week, in this system radiator size is fixedby speed and power in level flight, and not on climb, and any steam formedduring climb is condensed and led back into the water system. The engine main-tains 600 h.p. at 11,000ft. on climb and gives a maximum power of 640 h.p. at14,000ft. in level flight. It differs from the earlier type ' Kestrel," a sectionedexample of which is also shown on the Rolls-Royce stand, in that it. has astrengthened reduction gear, an improved supercharger, and that it runs at higherspeeds on fuel of 87 octane value. The weight is 975 lb. One can usually rely on the Hispano-Suiza stand to display some of the most advanced liquid-cooled types in the j
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