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Aviation History
1957
1957 - 1730.PDF
820 FLIGHT, 22 November 1957 PROVING THE P.I Static Testing by English Electric TH EW would challenge the contention that-•- the P.I intercepter for the R.A.F. is the subject of the largest aircraft-developmentprogramme in this country today. The English Electric Company hold primeresponsibility for the complete P.I weapon system and they are being assisted byFerranti (who have been named as the prin- cipal supplier of the radar equipment) andmany other firms, including Rolls-Royce and D.H. Propellers. The flight testing ofthe P.I has been extensively reported, notably in our issues of April 26 and July 19.It is now permissible to publish photo- graphs of some of the static testing whichhas been—-and still is—a major part of the overall effort. The two pictures above showstatic firing of a de Havilland Propellers Firestreak from the port pylon of a P.1Bfuselage section which has been mounted on its side at R.A.F. Valley, Isle of Anglesey.Portions of the body, ventral tank and tail- plane are provided with blast detectors andtemperature sensers. The picture on the left shows the third P.I A (structural-test)aircraft in its combined wing and fuselage loading rig and the illustration belowdepicts a P.I A undergoing vibration test- ing. Nearly all the ground testing of theP.I is being undertaken by English Elec- tric's aircraft research and developmentcentre at Warton Aerodrome, Lancashire.
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