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Aviation History
1925
1925 - 0057.PDF
JANUARY 29, 1925 P'ri^g^ Testing samples of1 wing spars : A small piece is tested to destruc- tion and a record kept of its charac- teristics. Thus any spar of any machine can be looked up at a future date, and incidentally the way in which spars with vary- ing character- istics behave under different conditions in actual use can be compared. I I m numbers are the same as those in the schedule, and tally withthe numbers of the parts in the Fairey stores, so that whether the order for replacements goes to the squadron store or tothe makers, the number to be quoted is always the same. In this connection it should be mentioned that each machineis divided into sections, each section comprising a large unit such as fuselage, wings, undercarriage, &c. Each sectionis allotted a letter, and at the Fairey works two separate, but cross-indexed, schedules are kept (these are entirelyseparate from the book-form schedule), the one giving detailed information relating to the sires and materials of•components, and the other the quantities, or " No. off." for each machine. Whenever an alteration is made it isat once recorded in the various schedules, and a sheet with the alterations is sent to all the squadrons or air stations usingthat particular machine, for insertion in the loose-leaf schedule. Having referred briefly to the Fairey system of schedulesand indexing,, as regards production types of machines, it may be of interest to mention that recently a considerableextension of the works has taken place, and that the experimental department is now entirelv separate from theproduction department, with separate staff and workers. Of much of the experimental work undertaken nothing maybe said, partly because some of it is on behalf of the Air Ministry, or, at any rate, connected with machines for theservice, and partly because certain research and experiments relate to future developments which at the present momentthe firm desires to keep secret. It is, however, possible to refer briefly to a very extensive series of tests carriedout on the characteristics of timbers, mainly on spruce. When the spruce planks for wing spars are sawn from thelog, large specimens are tested to destruction, and in this manner the quality of a particular log becomes apparent The Fairey oleo- pneumatic under- carriage as fitted on the " Fawn," " Flycatcher," etc. The travel of the wheels is exceptionally long,, and the machines can be pancaked from a considerable height without damage. 57
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