This article is about the 1940s interceptor. For the 1960s trainer, see Yakovlev Yak-30 (1960).
The Yakovlev Yak-30 was an experimental Sovietinterceptor from the late 1940s. Derived from the Yak-25, from which it differed primarily in having wings sweptback 35° at quarter chord, the Yak-30 retained the fuselage, tail surfaces and undercarriage of the earlier fighter.
The Yak-30 was designed to meet a Soviet requirement for a fighter capable of Mach 0.9, and able to operate from existing unpaved airstrips. To meet this request required a sweptback wing. Yakovlev based their design on the existing Yak-25 experimental fighter, but incorporated a modified wing with a sweep of 35 degrees.
Developmentedit
The Yak-30 was to be very similar to the former Yak-25, with only a few changes. The fuselage was that of the Yak-25 but with a circular cross-section. The tail was as on the Yak-25 but with a one-piece rudder, and slightly enlarged horizontal surfaces. The three NR-23 cannon armament was retained, and the cockpit layout was unchanged. The wingtip tanks could not be used, as they moved the aircraft's center of gravity too far forward, so they were redesigned to fit flush under the wing, midway from the fuselage. The aircraft was powered by a 1,590 kgf (3,505 lbf) RD-500 turbojet.
Testingedit
The first of two Yak-30 prototypes was given callsign "42", and the number "5" painted on the rudder. This aircraft was successfully test-flown on 4 September 1948 by pilot Anokhin, who continued test-flying the aircraft until 16 December 1948.
The second prototype, the Yak-30D, which joined the flight test programme early in 1949, had a 38 cm (15 in) section inserted in the aft fuselage, revised mainwheel doors forming a large section of the fuselage skinning, Fowler-type flaps in place of split flaps, increased fuel and ammunition capacity, and changes to the oxygen system and radio equipment. The Yak-30D was also fitted with air brakes on the aft fuselage. Normal loaded weight (without external fuel) was increased by 110 kg (243 lb).
During testing, it reached a speed of Mach 0.935 in a dive. Compared to the Yak-25, top speed was increased by 40 km/h (25 mph) and service ceiling was increased by 1,000 m (3,281 ft). However, the swept wing was found to be unsatisfactory with poor aileron authority.
Although the modifications introduced by the Yak-30D eradicated several shortcomings displayed by the first prototype, the first production deliveries of the superior MiG-15 were already taking place by the time that the improved version of the Yakovlev fighter entered flight test, and the results of NII V-VS trials were, therefore, little more than academic. The Yak-30 designation was later reused for the Yakovlev Yak-30 (1960).
Gordon, Yefim; Komissariov, Dmitry and Sergey (2005). OKB Yakovlev: A History of the Design Bureau and its Aircraft. Hinckley, England: Midland Publishing. ISBN1-85780-203-9.
Gunston, Bill (1995). The Osprey Encyclopedia of Russian Aircraft 1875–1995. London: Osprey. ISBN1-85532-405-9.
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This article is about the 1940s interceptor For the 1960s trainer see Yakovlev Yak 30 1960 This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Yakovlev Yak 30 1948 news newspapers books scholar JSTOR November 2019 Learn how and when to remove this message The Yakovlev Yak 30 was an experimental Soviet interceptor from the late 1940s Derived from the Yak 25 from which it differed primarily in having wings sweptback 35 at quarter chord the Yak 30 retained the fuselage tail surfaces and undercarriage of the earlier fighter Yak 30 Role Interceptor Manufacturer Yakovlev First flight 4 September 1948 Status Project cancelled Primary user Soviet Air Forces Developed from Yakovlev Yak 25 Contents 1 History 2 Development 3 Testing 4 Specifications Yak 30 5 See also 6 Notes 7 BibliographyHistory editThe Yak 30 was designed to meet a Soviet requirement for a fighter capable of Mach 0 9 and able to operate from existing unpaved airstrips To meet this request required a sweptback wing Yakovlev based their design on the existing Yak 25 experimental fighter but incorporated a modified wing with a sweep of 35 degrees Development editThe Yak 30 was to be very similar to the former Yak 25 with only a few changes The fuselage was that of the Yak 25 but with a circular cross section The tail was as on the Yak 25 but with a one piece rudder and slightly enlarged horizontal surfaces The three NR 23 cannon armament was retained and the cockpit layout was unchanged The wingtip tanks could not be used as they moved the aircraft s center of gravity too far forward so they were redesigned to fit flush under the wing midway from the fuselage The aircraft was powered by a 1 590 kgf 3 505 lbf RD 500 turbojet Testing editThe first of two Yak 30 prototypes was given callsign 42 and the number 5 painted on the rudder This aircraft was successfully test flown on 4 September 1948 by pilot Anokhin who continued test flying the aircraft until 16 December 1948 The second prototype the Yak 30D which joined the flight test programme early in 1949 had a 38 cm 15 in section inserted in the aft fuselage revised mainwheel doors forming a large section of the fuselage skinning Fowler type flaps in place of split flaps increased fuel and ammunition capacity and changes to the oxygen system and radio equipment The Yak 30D was also fitted with air brakes on the aft fuselage Normal loaded weight without external fuel was increased by 110 kg 243 lb During testing it reached a speed of Mach 0 935 in a dive Compared to the Yak 25 top speed was increased by 40 km h 25 mph and service ceiling was increased by 1 000 m 3 281 ft However the swept wing was found to be unsatisfactory with poor aileron authority Although the modifications introduced by the Yak 30D eradicated several shortcomings displayed by the first prototype the first production deliveries of the superior MiG 15 were already taking place by the time that the improved version of the Yakovlev fighter entered flight test and the results of NII V VS trials were therefore little more than academic The Yak 30 designation was later reused for the Yakovlev Yak 30 1960 Specifications Yak 30 edit nbsp Data from OKB Yakovlev 1 General characteristicsCrew 1 Length 8 58 m 28 ft 2 in Wingspan 8 65 m 28 ft 5 in Wing area 15 1 m2 163 sq ft Empty weight 2 415 kg 5 324 lb Gross weight 3 305 kg 7 286 lb clean Max takeoff weight 3 630 kg 8 003 lb with drop tanks Powerplant 1 Klimov RD 500 centrifugal compressor turbojet engine 15 9 kN 3 600 lbf thrust Performance Maximum speed 1 030 km h 640 mph 560 kn at sea level Landing speed 166 km h 103 mph 90 kn Range 1 000 km 620 mi 540 nmi internals Ferry range 1 500 km 930 mi 810 nmi with drop tanks Service ceiling 15 000 m 49 000 ft Rate of climb 41 0 m s 8 070 ft min Time to altitude 5 000 m 16 000 ft in 2 6 minutes 5 000 m 16 000 ft in 6 6 minutes Armament Guns 3 23 mm NR 23 cannon 75 rpg See also editAircraft of comparable role configuration and era F 84F ThunderstreakNotes edit Gordon Yefim Dmitry Sergey Komissarov 2005 OKB Yakovlev Hinkley Midland Publishing pp 180 181 ISBN 1 85780 203 9 Bibliography editGordon Yefim Komissariov Dmitry and Sergey 2005 OKB Yakovlev A History of the Design Bureau and its Aircraft Hinckley England Midland Publishing ISBN 1 85780 203 9 Gunston Bill 1995 The Osprey Encyclopedia of Russian Aircraft 1875 1995 London Osprey ISBN 1 85532 405 9 Gunston Bill Yakovlev Aircraft since 1924 London UK Putnam Aeronautical Books 1997 ISBN 1 55750 978 6 Retrieved from https en wikipedia org w index php title Yakovlev Yak 30 1948 amp oldid 1144947201, wikipedia, wiki, book, books, library,
