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Aviation History
1955
1955 - 1259.PDF
2 September 1955 373 Power plant Span ...Length Gross weightMax. speed Armstrong StddeleyViper S 35ft 5in 31ft llin5,9501b 323 m.p.h. AboYe, Jet Provost Below, Provost T.I Power plant ... Arris Leonides 25Span 32ft 2in Length 28ft SinGross weight 4,300 ib Max. speed 200 m.p.h. HUNTING PERCIVA L AIRCRAFT, LTD. The Airport, Lutan, beds. Telephone: Luton 6060 Jet Provost An order for a small service-test quantity of these db iniiio jet trainers was placed by the Ministry of Supply on behalf of the R.A.F. in March 1953, and although no large-scale order has yet been forthcoming, this would appear to be only a matter of time. It is expected that the particular Jet Provost to be demonstrated in the S.B.A.C. display this year will be a cleaned-up version, more closely approximating to ultimate production standard than the first machine and having a shortened undercarriage. (See drawing herewith). The Jet Provost is an all-metal aircraft developed from the Provost, powered with an Arm- strong Siddeley Viper 101 turbojet, and having pupil and instructor seated side-by-side. The wing has been modified, principally to accommodate additional tankage and the legs of the retractable undercarriage. Unlike that of the Provost, the fuselage is built in two parts; the cockpit is unpressurized. Immediately forward of the slotted wing-flaps are fitted the air brakes (below the wing) and spoilers (above), both sets of surfaces folding flush into recesses. Being mechanically linked, the air brakes and spoilers cannot be used independently. Their primary purpose is to assist manoeuvring and formation flying. There is an amber- screen installation for simulated instrument practice, and the Jet Provost can be armed, if desired, with a pair of nose-mounted 0.303in guns, and under-wing loads similar to those carried by the Armed Provost, and later described. Thus equipped, the machine might be used for police duties or weapons training. The entire engine compartment is lined with stain- less steel sheet, and equipment includes 14 self-setting flame switches. A total of 171 gallons of kerosine is normally carried in the wings and a non-jettisonable 50-gailon tank can, if required, be mounted under each wing-tip. Provost and Armed Provost The Provost T.I is the standard two-seat basic trainer of the Royal Air Force, and similar machines have been delivered to the Eire Air Corps. A "police" version, designated Armed Provost, has been supplied to the Air Forces of Southern Rhodesia and Burma. In all cases, the engine is an Alvis Leonides. Construction is all-metal, and the
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