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Aviation History
1950
1950 - 0166.PDF
io6 FLIGHT, 26 January 1950 ^•._-;^C".;; s de Havittand Vampire Hawker Sea Hawk Northrop F-89 Scorpion show excellent results on the HawJter jet fighters. It is known that the Shooting Star system, when using a power- boost ratio of 15: 1 (i.e., with the mechanism multiplying the pilot's effort by 15), a rate of roll of 150 deg per second can die attained at intermediate heights, and much higher rateJl at 30,000ft. With boost ratios of up to 28: 1 pheno- rates of roll are possible, but these are considered heitifer necessary nor desirable. Among American types the Thunderjet was the first to have an automatically adjusted aileron booster system to vary the application of force with air speed. Sharp divergence from common practice in providing lateral control is evident in the French N.C.1080 naval hter, which has no ailerons in the normal sense, but tflizes special Lemoigne-type compensators at the wing tips. Considering, now, the power plant as applied to fighter aircraft, it must be notified at the outset that, though the piston-engined Hawker Fury and D.H. Hornet families, and, in America, the Grumman Bearcat, continue in pro- duction, the reciprocating engine has been honourably dis- missed from this review, allowing attention to be concen- trated on the turbojet (the universally accepted prime mover for fighters) and, to a lesser extent, the rocket. No account will be taken of the ram-jet, or athodyd, though it is recognized that this form of power plant may find an application in supersonic fighters. It is jrignifirant that, whereas the engine designer requires for his turbojet the most direct intake—free from struc- tural or other impediment to the incoming air—and a tailpipe of optimum length, the aircraft designer must balance these considerations against the need for marrying power plant and airframe with the minimum of aerody- namic interference, and without undue prejudice to tan- kage, armament, pilot's position or, in the case oi new all- weather fighters, radar. Of these items tankage is of para- mount importance, for not only is the specific consumption of the turbojet high, but this type of unit allows little economy by "throttling." All jet fighters now in being have one or two turbojets, with or without a thrust-augmenting system in the form of liquid injection or tailpipe afterburning. In a few isolated instances one or two liquid rockets provide addi- tional thrust for take-off, climb and combat at high alti- tudes. The only existing type to have rocket power alone is the Soviet development of the German Me 263. Avro Canada CF-100 W(, J
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