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Aviation History
1945
1945 - 1717.PDF
225 FLIGHT AUGUST 30TH, 1945 ADMIRAL'S EXPEDITER W/T sets, V.H.F. and radio compass equipment with blind approach amplifiers are fitted. As it is to be expected that Sir Dennis Boyd will do a considerable amount of travelling on the Continent in his official capacity it is, we feel, essentially right that he should have for the purpose a well-appointed personal machine in keeping with his position. These finer points may not matter very much to the Englishman in war time, but they would have their effect on most Con tinentals at any time, and from this aspect it is to be hoped that Service officers of Flag, Field and Air Rank may one day each have their personal aircraft. All in all. Admiral Boyd's Expediter must be summed up as an extremely pleasant aircraft, very well contrived for carrying out its duties in an efficient and essentially satisfying manner. It is, in fact, what might rightfully be expected in an aircraft of its calling. When this picture was taken the sub-standard size R.A.F. roundels had not been painted on. Navy '' in small letters appear on each side of the fuselage. The words " Royal SLEEVE CAGE BALL THRUST''''ADAPTOR RACE5 ROLLERS Expansion A Neat Tool for Truing~up the Bore of a Tube THE tube expander, newly developed by the FaireyAviation Company's research division, is primarilydesigned to true-up the bore of a tube to a precise dimension, so as to accommodate a plug-end of fixed size. Hitherto, individual fitting of plug-ends has been neces- sary because of tube variations within specification limits. The new Fairey tube expander eliminates all such indi- vidual fitting, work. As shown in the accompanying drawing, the tool con- sists essentially oi a cage of parallel rollers which are tapered slightly at their leading ends and which are inclined laterally at a few degrees to the axis of the tool shank. This is to ensure that the tool, when in a lathe, will ieed itself in and out ol the tube to be expanded without undue strain on the lead-screw of the lathe. Ball thrust races, further ensure freedom of operation. As the rollers enter the tube, the taper will cause them to tend to tip. As this occurs, the sleeve at their other extremity comes into operation to counteract the tendency. The sleeve is spring loaded forwards, and slides back to allow the tool to enter the tube fully. When the desired These two views of the Fairey tube expander should be studied in conjunction with the sectioned drawing on the left. The upper picture shows the component parts, while in the lower the expander is shown with the sleeve in position for entering the tool in the tube. depth of expansion has been reached, the direction of rotation of the tube is reversed ; the tool then feeds cut, allowing the sleeve to slide to its forward position. Lubricant is fed into the tool through an adaptor and at the same time serves as a coolant. Soluble oil, as nor- mally used for machining, produces very satisfactory results, giving a high degree of mirror finish to the bore of the tube. The Fairey tube expander can be made up to meet any lequirements in tube size and material. The photographs show a representative tool designed for use with 14G 2jin. T.50, which is the present limit of development. Experim.-nts are in hand for expanding heavier tubes.
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