l),,,·,•loJ>1111•111 of motlt•r.n airrr11f1 Iii,.<" lhe En;!li,h El,•t'lrir P-1 snpt•r~onit· in1t•r1·1·ptor· i, s111·1·tlt·1l hy m,·an, of ,rh<"nie, which b~·-pass 1h1° old 1,ro101~·p1• slll;!t', :111d art• kno,n, Yarioush· .as tlu~ ••J)t•,·t•lt,prnc·.nt Hal<"h'" s('hernc, or t lu.• u.cra i:,:ie-Cc'►oke" !oil" h,~nu·. l ! n der thC!-i(~ 1,lan~, tlu: air,·raft 11111l<"r d<"\'r loi>mt·11l i, onlt•rrtl i11 ,mall qn:mlit~· (20, in lht· t·asc of the l'-1) tlnri111,: 1h1• de,.i:rn st:11,:1•, The Proving Process Bu GUt)VJ» C1.1 111T illi\' II. n. FOO'l''I'IT "A long period of testing and development is necessary to see whether the aircraft will be satisfactory as a fight i n g weapon." -Lo,·d Alexande,. of Tunis JUJ\'E 25, 1950. On this memorable date, the rumble of tank treads echoed around the world. For the uneasy peace of the cold war h ad been broken. ]\' ow the tide of the So, iet cquippebrnan. 1956 .~:1dgets that demanded a lot of test 1-lving to get them to operate efficiently . . \nd no one seemed to realize it . Bits and Pieces: fan Rankin. Man ager of the Garrett Manufacturing Corporation of Canada, and represen tati\'e for the AiResearch divisions of the G arrett Corporation-who make air <:o nd it ioning and other equipment for 111a11y Canadian aircraft-pointed out to me recently. ''Many people do not appreciate the fact that an aircraft is composed ot many pieces of high ly de ,·doped eq u ipment- more than e\'er bet'ore. And the operation of each piece ol: this equipment is ju st as important to the efficient functioning of the a ir plane as the airframe and engine." bits and pie ces R-\ l\.' k[l\,"S word s are right. The ~ost of a complete aircraft today ~:111 easily break down into as little as hal f for the airframe and engine. and the rest for the installed c.:quip rm: nt. In the early war years the :1irl'r;1me and engine accounted for 80 to <)()~ , .. So it is readily apparent that ·s e ha\'e added far more functionin" items that must be attuned together t~ m:tke ful ly operat ional aircraft. The onlv wav that this can be done is lw hu iiding, up flying hours. I n oth,ir \\'ords, the complete airplane, with all its installed equipment. must pass throug h a 11ro\·ing proi:ess of air rrials. There is no substitute or short ,ut for this extensive Hying. correcting;. an

The Proving Process

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AVRO Museum

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