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Sukhoi Su-11 (Fishpot-C)


Interceptor Aircraft


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Image from the Public Domain.

Improvements brought about to the Sukhoi Su-9 Fishpot series of Soviet interceptors gave rise to the Sukhoi Su-11 line.



Authored By: Staff Writer | Last Edited: 4/7/2017 | Content ©www.MilitaryFactory.com
When the more potent Uragan 5B ("Hurricane") series interception radar became available to Soviet warplanes, it was deemed beneficial to advance an existing design. The selection fell to the Sukhoi Su-9 "Fishpot" with its conventional design lines and overall effectiveness. The new radar fit, along with support for the new R-98 (AA-3 "Anab") medium range Air-to-Air Missile (AAM), produced the resurrected "Su-11" designation. The type would be taken into service to strengthen Soviet interception capabilities across the empire's vast frontier.

The size of the Urugan radar fit dictated an increase in the cross-section of the Su-9 airframe so the fuselage was made larger and the nose-mounted intake revised to keep airflow consistent to the same turbojet engine within. Like the Su-9, the Su-11 was powered by a single Lyulka AL-7F afterburning turbojet engine which outputted 21,164lb of thrust. A revised fuel system was also included which meant that external pipes were added along the rear section of the fuselage so no internal changes would have to be made in serial production. Swept-back tail planes and delta-wing mainplanes were both retained from the original Su-9 and completed the rather sleek look to the fast aircraft. The sole pilot sat under a bubble-style canopy with generally good views around his aircraft.

A first flight by way of the T-47 prototype was had on December 25th, 1958 and production spanned from 1962 until 1965 to which only 108 examples were completed due to developmental delays. As such introduction into Soviet Air Force service was not had until 1964. NATO designated the Su-11 as the "Fishpot-C" due to its origins in the original "Fishpot" entry.


The Anab missile became available in two distinct forms - one semi-active, radar-guided and the other InfraRed (IR) homing. With four total hardpoints , the Su-11 could be outfitted with two missile types each. The radar allowed the interceptor to be used for all-weather sorties but direction to the target still required reliance on ground-based radar which limited the tactical value of the Su-11. Additionally, its speed, radar, and armament made it exclusively a high-altitude counter against aerial threats - these points accounting for the rather low production figure (comparatively the Su-9 was completed in over 1,100 units).

As such, the Su-11 was something of a limited success in the Air Force stable and only replaced some of the older Su-9s in service. Through-and-through it remained an interim interceptor design at best and was retired during the early 1980s as more advanced aircraft became available to the Air Force. The series was also never exported to Soviet allies of the period.


Specifications



Year:
1964
Crew
1
[ 108 Units ] :
Sukhoi OKB - Soviet Union
National flag of Soviet Union Soviet Union
- Fighter
- Interception
Length:
60.01 ft (18.29 m)
Width:
27.66 ft (8.43 m)
Height:
16.01 ft (4.88 m)
(Showcased structural dimension values pertain to the Sukhoi Su-11 (Fishpot-C) production model)
Empty Weight:
19,842 lb (9,000 kg)
MTOW:
29,983 lb (13,600 kg)
(Diff: +10,141lb)
(Showcased weight values pertain to the Sukhoi Su-11 (Fishpot-C) production model)
1 x Lyulka AL-7F-1 afterburning turbojet engine developing 21,164 lb of thrust.
(Showcased powerplant information pertains to the Sukhoi Su-11 (Fishpot-C) production model)
Max Speed:
1,454 mph (2,340 kph; 1,263 kts)
Service Ceiling:
55,774 feet (17,000 m; 10.56 miles)
Max Range:
699 miles (1,125 km; 607 nm)
Rate-of-Climb:
27,000 ft/min (8,230 m/min)
(Showcased performance values pertain to the Sukhoi Su-11 (Fishpot-C) production model; Compare this aircraft entry against any other in our database)
STANDARD:
4 x R-98 (AA-3 "Anab") medium-range Air-to-Air Missiles (AAMs).
(Showcased armament details pertain to the Sukhoi Su-11 (Fishpot-C) production model)
T-47 - Prototype Model Designation
Su-11 "Fishpot-C" - Base series designation
Su-11-8M - Definitive production mark
Su-11U "Maiden" - Conversion Trainer
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