Sukhoi Su-11 Fishpot-C

Last updated: February 27, 2026

Overview

The Sukhoi Su-11 (NATO: Fishpot-C) was an improved version of the Su-9 interceptor with a larger radar and more capable missiles. It served in the Soviet Air Defense Forces (PVO) through the 1970s.

Design & Development

The Su-11 retained the Su-9’s basic delta-wing layout but featured a larger nose cone housing the Oryol-D radar, which provided better range and tracking. The new radar enabled the use of the improved K-8 (AA-3 Anab) missiles, which came in both semi-active radar and infrared variants.

Operational History

The Su-11 entered service in 1964 as a stopgap while the more advanced Su-15 was being developed. Only about 108 were built — far fewer than the Su-9 — as the Su-15 was already in development. The Su-11 was never exported and remained exclusively in Soviet service until retirement in the 1980s.

Capabilities

• Improved Oryol-D radar over Su-9
• K-8 missile capability (radar + IR)
• Mach 1.8 top speed
• All-weather interception
• Ground-controlled interception (GCI)

Armament & Weapons

• 2× K-8 (AA-3 Anab) missiles (1× radar-guided + 1× IR-guided)
• No internal gun

Video

Frequently Asked Questions

How was the Su-11 different from the Su-9?

The Su-11 had a larger radar (Oryol-D) and used the more capable K-8 missile system instead of the Su-9’s K-5 missiles.

How many Su-11s were built?

Only about 108 Su-11s were produced — a small number compared to the 1,100 Su-9s.

Why were so few built?

The Su-11 was a stopgap design; the much more capable Su-15 Flagon was already in development and entered service soon after.

References & Sources

• Wikipedia — Sukhoi Su-11 Fishpot-C

Related Aircraft

• ✈️ Sukhoi Su-9 Fishpot — the earlier Sukhoi interceptor variant
• ✈️ Sukhoi Su-15 Flagon — the interceptor that replaced it
• ✈️ Mikoyan-Gurevich MiG-21 Fishbed — a contemporary Soviet fighter