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Aviation History
1961
1961 - 1197.PDF
FLIGHT, 31 August 1961 299 HUNTING AIRCRAFT LTD (Member of British Aircraft Corporation Ltd) The Airport, Luton, Beds. Telephone: Luton 6060 Jet Provost In the SBAC flying display this year will be a production Jet Provost T.4. and a production T.51 of the Sudan Air Force will be showfi in the static park. The T.51 is an armed version of the Mk 3 trainer now operating in large numbers with the RAF. Powered with a Bristol Siddeley Viper 11 turbojet of 2,5001b thrust—a 40 per cent increase over the Viper in the Mk 3—the Jet Provost T.4 can climb nearly twice as fast as its pre- decessor, which it will soon begin to supplement in RAF service. A height of 30,000ft is attained in 12.5 min, and the makers report that this remarkably improved performance has been achieved without any reduction in endurance or changes in handling characteristics. Maximum speed is 414 m.p.h., and maximum range, with tip tanks, 570 n.m. Introduction of the Mk 4 into RAF service will mark a change in syllabus. "Current RAF pilot training courses", the makers report, "include 230 hours of actual flying. With the Jet Provost Mk 3 only 120 hours of this time was spent in this aircraft and 110 hours on an advanced trainer. With the higher performance Mk 4 this time is being increased to 160 hours at the end of which the pupil will receive his 'wings'. Thereafter, only 70 hours' training is to be spent in an operational trainer. Thus the overall 230-hour course remains, but the transfer of 40 hours to the Jet Provost will place by far the greater part of the training syllabus on this aircraft, and will also mean a notable economy in the cost of qualifying pilots." The handling qualities and docility of the Jet Provost have frequently been demonstrated at SBAC displays. Last year (issue of April 1) a member of the staff of Flight without previous jet flying experience was enabled to try his hand and reported very enthusiastically. ER. I89D The foregoing is the MoA designation of a jet-flap research aircraft now under construction, powered by a Bristol Siddeley Orpheus. The principle of the jet flap is the ejection from the trailing edge of the wing of a "flap" of gas. Work on this system began at the National Gas Turbine Establishment in November 1952. The ER.189D, or Hunting H.I26, is the only jet-flap aircraft known to be under construction. Jet Provost 1.3
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