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Sukhoi T-4 / Su-9 (II)


The Su-9 'Fishpot-B' developed in the late 1950s was a successful fighter with just over 1,000 aircraft produced between 1957 and 1962. The limited range of the TsD-30T radar and K-5MS led Sukhoi to develop the Su-11 with new Oryol radar and K-8M missile.

Within a short timescale, the Pavel Sukhoi OKB succeeded in developing a successful limited all-weather single-seat interceptor fighter from the T-3 and its immediate derivatives. Assigned the designation Su-9, this interceptor was available to enter IA-PVO Strany service from 1961. The Su-9 was directly evolved from the T-4 series of prototypes, which, sharing the 57 degree delta wing and Lyulka AL-7F turbojet with the preceding prototypes, differed from one another in detail design, systems and equipment. With a single exception, the T-4 prototypes featured a circular nose intake with a translating centrebody to accommodate the S-band R1L search-and-track radar. The exception, the T-49, had a unique arrangement of box-type intakes flanking a slim, ogival nose radome.

The first T-4 series prototype, apparently designated T-401, entered flight test during 1957, and, in May 1960, an essentially similar aircraft, the T-405, established a new 100km closed-circuit record of 2092km/h. The definitive fighter development, the T-43, was first flown on 10 Sept 1957 as the T-431, and established a zoom climb altitude record of 28,850m on 14 July 1959. Three years later, the T-431 set both a sustained altitude record of 21,170m and a 500km closed-circuit record of 2337km/h.

Revealed at the 1956 Aviation Day at Tushino were large Sukhoi fighters; one with a swept wing (called Fitter by NATO) and the other a tailed delta (called Fishpot). Both were refined into operational types, losing some of their commonality in the process. The delta Su-9 fighter was used in large numbers as a standard Soviet (P-VO Strany) defensive fighter, replaced from 1968 by the Su-11 with long nose, large radar and inlet and new missiles. Code names of tandem trainers are Su-7U Moujik and Su-9U Maiden.

An all weather fighter aircraft. NATO code name ‘Fishpot-B’.

Series production of the T-43 as the Su-9 was launched in 1959, standard armament comprising four beam-riding K-5 AAMs on underwing pylons. Production of the Su-9 is believed to have exceeded 1,000 aircraft, and this type remained in Soviet service until the beginning of the 'eighties.

Type: single seat all weather interceptor
Engine: 1 x Lyulka AL-7F single-shaft afterburning turbojet, 22,046 lb (10.000 kg) thrust
Wingspan: 8.43 m / 28 ft 8 in
Length: 16.70 m / 55 ft 9 in
Wing area: 26.25 sq.m / 282.55 sq ft
Height: 16 ft (4.88 m)
Max take-off weight: 12000 kg / 26456 lb
Empty weight: 8750 kg / 19291 lb
Max. speed: 1915 km/h / 1190 mph
Range with twin drop tanks: 900 miles (1450 km)
Armament: four Alkali-air-to-air missiles on wing pylons: no guns

Type: dual control trainer
Engine: 1 x Lyulka AL-7F single-shaft afterburning turbojet, 22,046 lb (10.000 kg) thrust
Range with twin drop tanks: 900 miles (1450 km)

Sukhoi Su-9 (II)



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