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Aviation History
1947
1947 - 0072.PDF
64 FLIGHT JANUARY I6TH, 1947 Cirrus Activities Some Details of the New Series of Larger Engines The port sida of the new180 h.p. Cirrus Bombaidier which is a. completely newdjsign. The fusl injection system can be clearly seen 7 PANS to extend the range ofBlackburn Cirrus engines to in,-clude the 180 h.p. four-cylinder Bombardier, the 265 h.p. six-cylinder Musketeer, and its moderately super- charged fellow the 300 h.p. Grenadier, have already been announced in Flight. During a recent visit to Brough, our representative was able to see one of the first batch of Bombardiers as it completed the iooth hour of a test run. These larger Cirrus engines, which form a new inverted, in-line, air-cooled series, are of completely new design. Among their special features, representing departures from past Cirrus practice, are direct petrol injection and over- head, or moie correctly underhead camshafts. A new type of dual ignition magneto, with novel timing control, is also fitted. All auxiliaries, although they are located on the rear cover, are driven from the front end of the crankshaft via the camshaft for the separate double injection pumps, each of which supplies a pair of cylinders. Two pumps are, therefore, fitted to the four-cylinder Bombardier. Certain main components, such as cylinder barrels, pistons and connecting rods, are interchangeable through- out the series. In a few weeks' time the six-cylinder normally aspirated Musketeer will be ready for rimning-in. The supercharged Grenadier, however, will not be completed for some months1.: Full performance figures and other engine data are to be released as soon as the engines complete their respective type tests. f, In view of the development work still to be done, par- ticularly in connection with the fuel- • injection system, and additional delays ; occasioned by control of the supplies of raw materials, castings, etc., pro- duction of Bombardiers (the first on the list) is unlikely to begin for at" least eighteen months. In the meantime, large numbers of Cirrus Minors and Majors are being produced, and substantial orders for; the New Year have already been re- ceived. Installed in Austers, to men- tion a particular example, Cirrus .Minors have already found their way to almost every part of the world.. Rear and three-quarter front views of the Bombardier, showing the underheadcamshaft and dual magneto. The unscreened ignition harness is of course only a temporary fitting. ENGINEERING FIRMS SEEK FACTS \/ NEXT month the British Export 1Trade Research Organization com- pletes its first year of full active worfeand the Chairman of the Council, Mc,~ ' Leslie Gamage, M.C., President also ofthe Institute of ^Export, reports that approximately 600 overseas enquiriesand research commissions have been handled by its trained research staff dutfeing the period. Close liaison with th§ Export Promotion Department of thfB.o.T. has been maintained throughout! A large number of these enquiries havecome from firms in the engineering and allied industries. Accurate up-to-dateinformation has been sought and given on sales possibilities.
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