Seaslug Mk. II missile
Thunderbird II at Imperial War Museum Duxford
Seaslug on display at Wickenby Aerodrome, Lincolnshire, UK
A Thunderbird I missile minus finned-boosters, a museum exhibit at the Midland Air Museum, England.
Test firing from the trials ship HMS Girdle Ness (A387), circa 1961.
Thunderbird missile (front)
The Seaslug launcher mounted on the quarterdeck of HMS Glamorgan, circa 1972
Colourful display of Thunderbird II airframe in Anti-Aircraft Museum, Tuusula, Finland. Note the changes to the main fins.
The firing of the first Seaslug test missile from HMS Girdle Ness (A387). This version is based on the RAE's early GPV, and retains the rear-mounted boosters before they moved forward on the "long round".
Missile rear end connector details. The Artillery Museum of Finland, Hämeenlinna.
Map with Seaslug operators in blue
Thunderbird at RAF Museum Cosford

From their work the LOPGAP experimental design emerged, short for "Liquid Oxygen and Petrol Guided Anti-aircraft Projectile".

- Thunderbird (missile)

This meant that large stabilising fins as used on contemporary missiles in service with the Royal Air Force (Bloodhound) and the British Army (Thunderbird) were not required.

- Seaslug (missile)
Seaslug Mk. II missile

4 related topics

Alpha

A Bloodhound missile at the RAF Museum, Hendon, London.

Bloodhound (missile)

British ramjet powered surface-to-air missile developed during the 1950s.

British ramjet powered surface-to-air missile developed during the 1950s.

A Bloodhound missile at the RAF Museum, Hendon, London.
Bloodhound as used by the Royal Australian Air Force from 1963 with No. 30 Squadron in Darwin, Australia
Bloodhound of the Republic of Singapore Air Force
Before-and-after detonation of a K11A1 continuous rod warhead intended for Bloodhound Mk.2

Bloodhound shares much in common with the English Electric Thunderbird, including some of the radar systems and guidance features.

This was initially known as LOPGAP, for Liquid-Oxygen and Petrol, the proposed fuel.

The League of Nations assembly, held in Geneva, Switzerland, 1930

Blue Envoy

British project to develop a ramjet-powered surface-to-air missile.

British project to develop a ramjet-powered surface-to-air missile.

The League of Nations assembly, held in Geneva, Switzerland, 1930

Two designs were entered for the Stage 1 missile contract, English Electric's Red Shoes and Bristol Aerospace's Red Duster.

They started the New Guided Missile Program, or NIGS for short, to replace the existing Seaslug missile on the County-class destroyers with a missile of much higher performance and a fire control system and radar that could track multiple targets, similar to the modern Aegis Combat System.

The League of Nations assembly, held in Geneva, Switzerland, 1930

Rainbow Code

The Rainbow Codes were a series of code names used to disguise the nature of various British military research projects.

The Rainbow Codes were a series of code names used to disguise the nature of various British military research projects.

The League of Nations assembly, held in Geneva, Switzerland, 1930

Blue Shield – see Armstrong Whitworth Sea Slug

Indigo Corkscrew – continuous wave radar, used with the Bristol Bloodhound and English Electric Thunderbird SAMs

An artist's depiction of a Soviet surface-to-air missile system engaging two F-16 Fighting Falcons

Surface-to-air missile

Missile designed to be launched from the ground to destroy aircraft or other missiles.

Missile designed to be launched from the ground to destroy aircraft or other missiles.

An artist's depiction of a Soviet surface-to-air missile system engaging two F-16 Fighting Falcons
A Wasserfall missile lifts off during a test flight.
Typical of the "boost-glide" type weapons, the Fairey Stooge was an armed drone aircraft flown to a collision with the target. Enzian and Schmetterling were similar in concept, design and performance.
Nike Ajax was the first operational SAM system.
SA-2 Guideline surface-to-air missiles, one of the most widely deployed SAM systems in the world
A moment after an S-75 Dvina (SA-2) hits an F-105 over North Vietnam, the fighter-bomber starts to spew flame.
An S-75 detonates directly below an RF-4C reconnaissance plane. The crew ejected and were taken captive.
The Osa was the first system to include search, track and missiles all on a single mobile platform.
The Strela-2 was an early and widespread MANPADs system.
Starstreak laser-guided surface-to-air missile of the British Army.
Long-range SAMs like the RIM-161 are an important part of modern naval forces.
The David's Sling Stunner missile is designed for super-maneuverability. A three-pulse motor activates only during the kill-stage, providing additional acceleration and maneuverability.
Israel's Arrow 3 missiles use a gimbaled seeker for hemispheric coverage. By measuring the seeker's line-of-sight propagation relative to the vehicle's motion, they use proportional navigation to divert their course and line up exactly with the target's flight path.
A JASDF soldier uses the optical sight on the Type 91 Kai MANPADS to acquire a mock airborne target. The prominent vertical metal devices on the left are the IFF antennas.
A U.S. Marine antiaircraft gunner aims his Stinger at a location indicated by a spotter.

Two competing designs were proposed for "Stage 1", based on common radar and control units, and these emerged as the RAF's Bristol Bloodhound in 1958, and the Army's English Electric Thunderbird in 1959.

A third design followed the American Bumblebee efforts in terms of role and timeline, and entered service in 1961 as the Sea Slug.