Teep 81 (missile)

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Teep 81 (Tan-SAM)
Type 81 SAM - launcher.jpg

JASDF Fire Control Systems vehicle.
JASDF launcher and
Fire Control Systems vehicles
TeepMobile, short-range surface-tae-air missile
Place o oreeginJapan
Service history
In service1981–present
Uised biJapan
Production history
No. biggitApprox. 1,800
Wecht100 kg
Lenth2.7 meters
Diameter160 mm
Warheid9.2 kg HE-fragmentation
Contact and radar proximity

IngineNissan Motor single-stage solid-fuel rocket motor
Weengspan600 mm
0.5 - 14 km
Flicht ceilin15 to 3,000 meters
SpeedMach 2.9
Kawasaki Heivy Industries inertial guidance with Toshiba passive infrared homing for terminal guidance
Isuzu Motors 6×6 Type 73 armoured mobile truck

The Type 81 Surface-tae-Air Missile (81式短距離地対空誘導弾) or Tan-SAM (短SAM) is a Japanese developed surface-tae-air missile currently in service with the Japan Ground Sel-Defence Force.

Development[eedit | eedit soorce]

The system wis developed by Toshiba as a replacement for the 75 mm M51 Skysweeper and M15A1 37 mm/12.7 mm anti-aircraft guns. Designed as a mobile short-range seestem tae fill the performance gap between the FIM-92 Stinger man portable missile, and the lairger MIM-23 Hawk missile seestem, which were both in service at the time. Development work began in 1966, with the first test firings conductit in 1978. The seestem wis designatit as the Teep 81 by the JSDF, and contracts were placit for the seestem in 1980. The seestem enterit service in 1981. In 1987, minor changed seestem SAM-1B wis designatit.

Development work on an upgrade designatit Tan-SAM Kai stairtit in 1989.[1] Upgradit seestem wis designatit as SAM-1C in 1995, initial production on upgrade kits for the seestem stairting in 1996. Twa fire units were schedulit tae be upgraded in 2000, with work on the program continuing into 2006.

Development work on an upgrade designatit Tan-SAM Kai II stairted in 2005.

In 2014, the new teep of short-range surface-taw-air missile designatit as Teep 11 wis officially unveilit, which as Tan-SAM Kai II research & development results, would replace the Teep 81.

Description[eedit | eedit soorce]

The tripod-mounted optical tracking unit

The Tan-SAM 1 missile is cruciform in cross section with four clippit delta weengs attached tae the mid body, and four small steerable clippit delta fins at the rear of the missile. The missile is propellit by a solid rocket motor, with giving it a burn-out velocity of about Mach 2.4. It is initially inertially guided to a likely intercept point, with an all-aspect infra-red seeker taking over to handle terminal guidance. The missile haes a 9.2-kilogram fragmentation warheid triggered either by contact or a radar proximity fuze with a lethal radius of between 5 and 15 meters depending on the target teep.

A fire unit conseests of ane Fire Control Seestem vehicle and twa launcher vehicles as well as a number of support vehicles with a total crew of fifteen men. The Fire Control Seestems vehicle conseests of an Isuzu Motors 6×6 truck with a 30 kW generator unit moontit behind the driver's cabin, and a rectangular three-dimensional pulse-doppler phased array radar. The radar can operate in three modes: omni-directional search, sector search/course tracking mode, and fine tracking mode. The radar is scanned baith mechanically and electronically and can track up tae sax targets within the same 110-degree arc in course tracking mode. Twa targets can be tracked in fine tracking mode at greater accuracy, with the single-shot kill probability for each target relayed tae the operator via a CRT display. The radar haes a range of aboot 30 kilometers, and haes built in IFF capabilities.

Information on the twa selectit targets is then passed tae the two attached launcher units, which are awso moontit on Isuzu Motors 6×6 trucks, which slew and elevate thair launchers toward the target. The launchers can be deployed up tae 300 meters away frae the Fire Control Seestem vehicle. An intercept course is computit for the missile, and the missile is launched. The missile follows the initial inertial course until it reaches a pre-programmed point where it activates its infrared seeker. The infrared seeker only scans a programmed area of the sky to prevent it from locking onto the sun. From that point it switches to passive infrared homing for the terminal phase of the flight.

The infrared seeker does not uise IR filters tae reject decoys, although there is a degree of protection providit by the uise of intermediate frequency seeker scanning pattern.

Each launcher is equippit with an optical director than can be uised instead of the radar in a heich ECM environment or if the radar is not operational; additionally the vehicle can be moontit with one or two 12.7 mm calibre heivy machine guns, for self-defense in frontal forward areas against ground threats and close-in(<500 m) incoming air threats. The seestem can be set up in approximately 30 minutes, and the launcher reload time for all four missiles is around three minutes.

SAM-1C upgradit missile uise a phased array active radar seeker, with the capability of receiving mid-course guidance updates frae the Fire Control Seestems vehicle. The upgrade awso increases the missiles maximum range tae 14 kilometers while increasing the missile weight tae 105 kilograms. A new smokeless motor with improved thrust is also fitted, replacing the existing motor. Awso the Fire Control Systems vehicle is fittit with a thermal eemager tae impruive operation in an ECM heivy environment.

Deployment[eedit | eedit soorce]

The seestem is currently deployed by the JGSDF, JASDF and JMSDF with 57 fire units serving with the ground force (oot of an initial requirement for 76), 30 serving with the air force, and 6 serving with the maritime force.

Notes[eedit | eedit soorce]

References[eedit | eedit soorce]

  • Jane's Strategic Weapon Systems Issue 44
  • Jane's Land-Based Air Defence 2005–2006
  • "81式短距離地対空誘導弾". Archived frae the oreeginal on 2007-12-12. Cite uses deprecated parameter |deadurl= (help)