Aircraft of the Chaco War 1928-1935 by Antonio L. Sapienza

By Antonio L. Sapienza

Greater than one hundred fifty by no means prior to released illustrations, complimented through an exhaustively researched textual content, rfile the little-known air struggle among Bolivia and Paraguay throughout the overdue Nineteen Twenties and early Thirties. complete info of such plane as Fiat C.R. 20s, Curtiss Hawk IIs, Curtiss Ospreys, Potez 25s and all different forms hired by way of either opponents, together with acquisition, operations, and markings make this a needs to for historians, modelers, and somebody drawn to golden-age aviation.

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Small sharply swept strakes are positioned at the trailing edge on the underside at about two-thirds span. The wings are one-piece structures attached to the rear fuselage (the fuel tank section) by bolts, the wing/fuselage joint being covered by detachable fairings. They have neither ailerons nor high-lift devices, all control being exercised by the tail surfaces. Tail unit: As for the '121' missile. All three tail surfaces have self-contained electrohydraulic actuators cooled by deionised water to protect them from the kinetic heating and the heat generated by the engine afterburner.

Flight tests of the DBR-2 (Yastreb-2) system took place in the late 1960s and early 1970s and went well. Soon, however, work on this system was curtailed, as was all further development work on supersonic strategic UAV systems. Nevertheless, the design and test experience gained with the' 139' proved crucial, saving the day for all subsequent UAV programmes undertaken at the Tupolev OKS; the feasibility of using the drone at least ten times, with parachute landings on unprepared fields, was effectively demonstrated.

One of these advantages was the Tu-143's navigation/flight control suite enabling a higher-precision approach to the target than that of the MiG-21 R and the Yak-28R; accurate navigation was one of the decisive factors affecting the efficiency of aerial reconnaissance. Stabilisation of the drone's flight, coupled with the controlled environment in the equipment bay, provided the optimum operating conditions for the mission equipment, ensuring high-quality intelligence. The cameras fitted to the Tu-143 allowed objects 20 cm (7:4 in) long to be discerned on photos taken at 500 m (1,640 ft) and 950 km/h (590 mph).

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