mm mortar shell fitted with an M734 Fuze]

American soldiers firing a 120mm mortar

The M734 Multioption Fuze for mortar shells uses frequency modulated continuous wave (FMCW) directional doppler ranging (DDR) techniques and is hardened against electronic countermeasures designed to prematurely trigger detonation. Electrical power is supplied to the fuze via an air flow driven turbine alternator.

The M734 fuze is used on 60 mm, 81 mm, and 120 mm mortar projectiles. The updated version is the M734A1.

afety/Arming Mechanisms

The fuze has three safety/arming mechanisms: initial arming is via setback (>395 gs), accompanied by a velocity change of 70 fps sustained airflow to the turbine alternator for a minimum of 100 metres, coupled with apex detection for delayed electrical arming [http://www.l-3com.com/products-services/docoutput.aspx?id=688] .


Tools are not required to arm, disarm or configure the M734 fuze. There is no pull-wire safety pin to remove, unlike some other mortar fuzes. The M734 can be adjusted simply by rotating the top of the fuze clockwise by hand until the required 3-letter setting is over the index line. Additionally, the detonation setting can be changed any number of times before firing, without causing damage to the fuze.

There are four sets of 3-letter codes engraved around the circumference of an M734 fuze which have the following meanings:

#PRX - proximity air burst between 1 and 4 metres (3 to 14 feet) above the target
#NSB - near surface-burst between 0 and 1 metre (0 to 3 feet) above the target
#IMP - impact i.e. instantaneous detonation upon hitting the target
#DLY - delayed detonation, 0.05 seconds after impact

Note: the PRX setting will detonate a 60/81mm mortar shell at a height of 7 feet, and a 120mm shell at a height of 14 feet above the target.

Reliability is increased by the fact that if the M734 fails to detonate the mortar shell at one setting, it will automatically use the next one along i.e. failure at the PRX setting causes NSB detonation to be selected. Similarly, failure to detonate at the NSB setting would automatically cause IMP to be selected, and so on.

External links

* [http://www.kdi-ppi.com/html/m734_bio.htm The M734A1 fuze]
* [http://www.globalsecurity.org/military/library/policy/army/fm/23-90/ch3.htm Mortar strategy (includes M734)]
* [http://proceedings.ndia.org/5560/Wednesday/Session_III-B/Mohan.pdf M734 improvement project information]
* [http://www.l-3com.com/products-services/docoutput.aspx?id=688 Manufacturer's technical specifications for the M734]
* [http://www.l-3com.com/divisions/overview.aspx?id=43 KDI Precision Products Inc (manufacturer of the M734)]

Wikimedia Foundation. 2010.

Поможем сделать НИР

Look at other dictionaries:

  • M734 — 120mm Munición de mortero equipada con una espoleta de proximidad M734 …   Wikipedia Español

  • Dragueur de mines — Un dragueur de mines est un navire de guerre de faible tonnage qui utilise une drague, dispositif mécanique, acoustique ou magnétique, remorqué dans une zone susceptible d être minée : Dragueurs de mines polonais …   Wikipédia en Français

  • Mortar (weapon) — Part of the series on Cannon His …   Wikipedia

  • M224 Mortar — The M224 60 mm Lightweight Mortar is a smooth bore, muzzle loading, high angle of fire weapon used for close in support of ground troops. DescriptionThe M224 system is composed of the M225 Cannon (14.4 lb), M170 Bipod (15.2 lb), M7 Baseplate… …   Wikipedia

  • M252 Mortar — The M252 81 mm medium weight Mortar is an American smooth bore, muzzle loading, high angle of fire weapon used for long range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of… …   Wikipedia

  • Тральщики типа «Сирьюс» — Les dragueurs «D» Les dragueurs du classe Sirius Проект …   Википедия

  • Proximity fuze — A proximity fuze (also called a VT fuze, for variable time ) is a fuze that is designed to detonate an explosive device automatically when the distance to target becomes smaller than a predetermined value or when the target passes through a given …   Wikipedia

  • Fuse (explosives) — In an explosive, pyrotechnic device or military munition, a fuse (or fuze) is the part of the device that initiates function. In common usage, the word fuse is used indiscriminately. However, when being specific (and in particular in a military… …   Wikipedia

  • List of military vehicles — Military vehicles include all land combat and transportation vehicles, excluding rail based, which are designed for or are in significant use by military forces throughout the world. See also list of armoured fighting vehicles. Contents:… …   Wikipedia

  • M234 launcher — Infobox Weapon name=Launcher, Projectile, 64 mm, Riot Control, M234 caption= origin=flagcountry|United States type=Less lethal Weapon is ranged=yes service=1978 1995 used by=United States wars= designer= design date=1973 1978 manufacturer=… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”