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Aviation History
1946
1946 - 1806.PDF
S78 FLIGHT SEPTEMBER 12TH, 1946 Qeneral Review of the Reciprocating' Type Engines Exhibited t PISTON ENGINES DISPLAYED A LTHOUGH we may well regard with some pride the /A unrivalled place held by British gas-turbine engines •*• •* in the aeronautical world to-day, it must not be forgotten that much of their quality is due to that pains- taking care of design and manufacture which, so carefully guarded and fostered in past years, has been the pride of our engine manufacturers with their matchless history of piston engines. Despite the advent of the new form of prime mover, the orthodox I.C. engine is unlikely to be banished from the aviation scene for many years yet, and until that day comes we may continue to look to the makers of British aircraft engines to produce piston engines of a quality typified by those exhibited at Radlett to-day. As in the other sections of this issue, it is most con- venient to list the exhibits in the alphabetical order of the makers' names:- Alvis Limited are showing their Leonides supercharged CIRRUS MAJOR III. (Top left)Largest of the famous Cirrus • range of light aircraft engines. •CIRRUS MINOR II. (Centre!^ One of the best engines of i|jrpower class in the world. LEON- IDES. (Below) The neat layoutand general cleanliness of design can here be seen. CENTAURUS 57 : Typically a Bristol product in its sleeve-valve neatness, this is the most powerful unit of its type in exist- ence and is used on some of our latest military aircraft. 9-cylinder air-cooled radial unit which, with a maximum power output of just over 500 b.h.p., is a fine example of modern practice in the low-medium power field. The en- gine has been designed as a complete power plant with full auxiliaries housed within a neat and efficient standard cowling. ... ' ..-..,.; Bore and stroke ... ... 4.80in x 4.41m „• -»;•-• Capacity ' ... ... ... 11.78 litres Max. power 525 b.h.p. R.P.M 3,000 Boost 6.5 Iblsq. in. Altitude 5,000ft Fuel cons. 0.54/0.75 pt/b.h.p./hr. Max. cont. cruise power... ... ... 400 b.b.p. R.P.M 2,800 Boost 2 Ibjsq. in. Altitude 10,000ft Fuel cons. 0.58/0.62 pt/b.h.p./hr. Weight, net dry 747 (fa Blackburn Aircraft, Limited, have on show modaJs-jpf the Cirrus Major III and the Cirrus Minor II. Both are" unsupercharged four-cylinder inverted in-line air-cooled types of proven efficiency, the former of 155 h.p. and the latter of 100 h.p. Major ill Bore and stroke ... ... ... 4.Tlin x 5.51 in Capacity ... ... ... ... 6.33 litres Max. power 155 b.h.p. R.P.M 2,450 Altitude S.L. Fuel cons 0.542 pt/b.h.p./hr. Max. cont. cruise power... ... 145 b.h.p. R.P.M 2,200 Altitude S.L. Fuel cons ... 0.452 pt.lb.h.p.jhr. Weight, net dn 333 (b The Bristol Aeroplane Company represent their famous range of sleeve-valve air-cooled radial engines with the 18- Minor II 3.93in. x 4.99in. 3.99 litres 100 b.h.p. 2,600 S.L. 0.528 pt./b.h.p.//ir. 90 b.h.p. 2,300 S.L. 0.462 pt./b.h.p./hr. 234 1b
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