Terrier Missile

Much of this information is from http://www.designation-systems.net, courtesy of Andreas Parsch.

Early Development

The original Terrier missile came from Project Bumblebee, the U. S. Navy’s anti-aircraft guided missile project. The three main developments that came from this project were the long range Talos, the medium range Terrier, and the short range Tartar missiles.

The Terrier was the U.S. Navy's first operational ship borne medium-range surface-to-air missile. It was one result of the Bumblebee program, whose ultimate goal was the development of the SAM-N-6 Talos long-range surface-to-air missile. During development of Talos, a supersonic Test Vehicle (STV, CTV-N-8) was built to evaluate the guidance system at supersonic speeds. Because the results were promising, and the development of the complicated Talos would take many more years, it was decided to develop the STV into a tactical missile, the Terrier. The flight tests of the Terrier began in 1951, when the designation SAM-N-7 was also assigned. It took a few years to get the bugs out of the system, and the Terrier was not operational until 1956.

Initial Production and Deployment

Production started with the SAM-N-7, but after a few rounds switched to the slightly reengineered SAM-N-7a Terrier 1a, soon to be known as Terrier BW-0 (Beam-riding, Wing-controlled, series 0). It employed a beam-riding guidance system, and used wings for flight control. It was powered by an Allegany Ballistics solid-fuel booster and an MW Kellogg solid-fuel sustainer motor. Terrier 1b was to be a version with repackaged electronics (designed by APL/Philco), but this was not produced. Another electronics redesign effort (initiated by BuOrd, designed by Motorola) resulted in the SAM-N-7c Terrier 1c version. This variant, later known as Terrier BW-1, had essentially the same characteristics as the BW-0, but was easier to produce and had higher reliability. The BW-0/1 versions were effective only against subsonic targets at altitudes up to 40,000 ft.

The usage of suffix letters for the basic SAM-N-7 designation to distinguish between Terrier variants was short-lived, and was discontinued during the production of the BW-1. The Terrier was henceforth simply known as SAM-N-7 (and even that was rarely used), and the variants were designated by the suffixes BW-0, BW-1 (and others, which see below).

The next version of the Terrier was the BT-3 (Beam-riding, Tail-controlled, series 3; series 2 was reserved for a motor improvement, which was not built). This missile had a new airframe, where the wings were replaced by fixed strakes, and the control surfaces were moved to the tail. The tail-control significantly enhanced the missile's agility. The BT-3 also had an improved autopilot and a new propulsion system (with a new sustainer, and an additional auxiliary solid-fuel power system) for higher speed and range. The first successful test was accomplished in 1954, and the BT-3 was operational in 1956. The improvements made the BT-3 effective against supersonic targets.

An improved version, called Terrier BT-3A, had a longer-burning charge for the auxiliary power system, and an end-burning sustainer, which doubled the missile range to about 20 nm. The BT-3A was also the first Terrier which could be used effectively in a surface-to-surface (anti-ship) mode. The BT-3A (N) was a nuclear armed BT-3A (the only nuclear Terrier version), which had a 1 kT W-45-0 warhead.

The next development step was to change the beam-riding guidance to semi-active radar homing. The Terrier HT-3 used many components of the RIM-24 Tartar missile, which was itself essentially a short-range Terrier without booster. In 1957, the radar homing system for Terrier was tested with a converted wing-controlled missile, designated XHW-1. The production HT-3 used a C-band radar seeker. The SARH (Semi-Active Radar Homing) guidance greatly increased the effectiveness of the missile against low-flying targets.

In 1963, all variants of Terrier were re-designated in the RIM-2 series, as follows:

Old Designation New Designation
SAM-N-7 BT-3A/-3A (N)RIM-2D
The last Terrier variant was the RIM-2F, an improved RIM-2E. It had a new sustainer motor and power supply, which again doubled the missile's range, to about 40 nm. The RIM-2F was also known as HTR-3 (Homing Terrier, Retrofit). Additional improvements included solid-state electronics, improved ECCM, multiple-target ability, and improved anti-ship capability. Many RIM-2E missiles were brought up to RIM-2F Standard.

Production of the RIM-2 Terrier ended in 1966, after approximately 8000 missiles had been built. The RIM-2F was gradually replaced by the RIM-67 Standard ER missile, and the last Terriers were retired at the end of the 1980's.

Note: Data given by several sources show slight variations. Figures given below may therefore be inaccurate!
Length (incl. booster)27 ft 1 in (8.25 m)8.0 m (26 ft 4 in)
Wingspan47.3 in (1.20 m)0.61 m (24 in)
Fin span40.5 in (1.03 m)1.07 m (42.3 in)
Diameter13.5 in(0.34 m)0.34 m (13.5 in)
Weight(w/o booster)
480 kg (1060 lb)535 kg (1180 lb)
584 kg (1290 lb)825 kg (1820 lb)
SpeedMach 1.8Mach 3.0
Ceiling12200 m (40000 ft)24400 m (80000 ft)
Range19 km (10 nm)RIM-2D: 37 km (20 nm)
RIM-2F: 75 km (40 nm)
PropulsionSolid-fueled rocket booster
Solid-fueled rocket sustainer
Warhead218 lb controlled-fragmentation warheadRIM-2D (BT-3A (N)): W-45-0 nuclear warhead (1 kT)

Standard Missile

The Standard missile program was initiated in 1963 to provide a replacement for the RIM-2 Terrier and RIM-24 Tartar missile systems. The Tartar replacement was designated RIM-66 Standard MR (Medium Range), while the longer-range Terrier replacement became the RIM-67 Standard ER (Extended Range). The Standard is still the U.S. Navy's main medium and long range air defense missile.

All blocks of the Standard SM-1ER missile were designated as RIM-67A. They were essentially identical to the corresponding SM-1MR missile, except for the propulsion. Instead of the MR's MK-56 dual-thrust motor, the ER used an Atlantic Research Corp. MK 30 solid-fuel rocket sustainer motor, and a Hercules MK 12 booster.

The main improvements of the SM-2MR Block I/II/III missiles were also included in the corresponding SM-2ER versions, the major new features being the inertial guidance system, and the monopulse seeker for terminal homing. However, SM-2ER is not designed to be fired from Aegis ships. The SM-2ER Block I was designated RIM-67B, and entered service in 1980. All of the former DLG's were upgraded to support the SM-2(ER) missile with the exception of the USS COONTZ and the USS KING.

The RIM-67C SM-2ER Block II introduced a new MK 70 booster (re-grained MK 12), which almost doubled the range of the SM-2ER. Interestingly, the enhanced booster extended the performance envelope of the RIM-67C well beyond the limits of the then current fire-control system on Terrier ships, but it did of course improve general missile performance against high-performance targets.

In the 1980's the U.S. Navy planned a nuclear-armed version of the Standard SM-2ER, because the last nuclear armed surface-to-air missiles, the RIM-2D Terrier and RIM-8E/G/J Talos, were about to be retired, leaving the Navy without a nuclear anti-air warfare capability. The nuclear SM-2 was to be equipped with a W-81 fission warhead (4 kT yield). However, these plans have since been dropped, and the U.S. Navy has currently no nuclear-armed SAMs.

In 1986, the USS KING and the USS COONTZ were the only remaining Terrier platforms capable of deploying the HTR-3 missile as well as the BT-3A and the SM-1ER. The HTR-3 support electronics were disabled in 1987 and the USS King became one of the last ships to disable the BT-3A support electronics in 1989.

Note: Data given by several sources show slight variations. Figures given below may therefore be inaccurate!
Length (incl. booster) 26 ft 2 in
Fin span (w/o booster) 42.3 in
(booster) 62 in
(w/o booster) 13.5 in
(booster) 18 in
Weight 2960 lb
Speed Mach 2.5 Mach 3.5
Ceiling > 80,000 ft
Range 35 nm 100 nm
Propulsion (sustainer) Atlantic Research Corp. MK 30 solid-rocket sustainer
Propulsion (booster) Hercules MK 12 solid-rocket Hercules MK 70 solid-rocket
Warhead MK 51 continuous-rod MK 115 blast-fragmentation

This information is from http://www.designation-systems.net, courtesy of Andreas Parsch.