Mount, M177, in folded position. 1:4 For the 81MM Mortar System: X NSN (LIN): 1015-01-441-3113 : STAFF SECTION, CLEANING, ARTILLERY 1:4: 120mm IHE grenade DM91. FT 81-AI-3 Firing Tables Mortar, 81mm: M28A1 and M29 Mortar 81mm Self propelled M125A1 and M125 Carrier, 81mm Mortar Tracked XM755 [US Army.] The section leader, acting as FDC, has one deflection instead of two or more. See Chapter 3, paragraph 3-14 for a detailed discussion of malfunctions. The cartridge is painted light green and has red markings and one narrow yellow band. a. If it is necessary to leave the ammunition uncovered, it should be raised on dunnage at least 6 inches above the ground. It can provide all-weather, ground-based, close supporting, accurate, immediately MC Medical Guide; Client-side mods; TFAR 1.x for players; This action breaks an internal sheet pin and internal wire, thereby disabling the proximity function. Tabulated data. The M375A3 cartridge is ballistically similar to the M374A3 (HE) cartridge. Agreed that mortars should generally be used close to the frontline. It has no safety pins or wires to reduce preparation time. 0.30, BROWNING, M1919A4, M1919A5 AND M1919A6 {TO 39A-5 AF-32} (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, MACHINE, CAL. b. Fort Belvoir, VA 22060 Each squad member should be able to perform all the following premount checks: a. b. (2) The fin and fuze assembly must be checked for tightness and damage. All PD fuzes are superquick--detonate on impact. e. Care, Handling, and Preservation. It has four function settings: PRX (proximity) causes the cartridge to explode between 3 and 13 feet above the ground; NSB (near-surface burst) causes the cartridge to explode up to 3 feet above the ground; IM (impact) causes the cartridge to explode on contact; and DLY (delay) incorporates a 0.05-second delay in the fuze train before exploding the cartridge. c. After the gunner has announced, "Up," the squad leader should check the mortar to determine if the exercise was performed correctly. The gunner is given a deflection and elevation change in a fire command causing the gunner to shift the mortar between 200 and 300 mils for deflection and between 100 and 200 for elevation. 9301 Chapek Road., Bldg.1458 .50: BROWNING, M2 (HEAVY BARREL, FLEXIBLE) ON MOUNT, MACHINE GUN, TRIPOD MTD, CAL. A spring-loaded locating catch is behind the elevating gear housing, which locates the plain leg in its supporting position for level ground. The gunner removes the sight and places it in the case with 3200 deflection and 0800 elevation indexed. Each cartridge weighs about 10 pounds and is provided with the M223 propelling charge, consisting of four horseshoe-shaped increments fitted around the tail. The fuze is not intended to function at charge 0. The M252 81mm Medium Extended Range Mortar is a crew-served, medium weight mortar which is highly accurate and provides for a greater range (4,500 meters to 5,650 meters) and lethality than the . If the mortar section is to operate quickly and effectively in accomplishing its mission, mortar squad members must be proficient in individually assigned duties. It arms within a maximum of 2.50 seconds. c. The M375A2, M375A1, and M375 cartridges may also be used. 4-4. 81mm smoothbore mortar Barrel length 1.28 m Muzzle velocity 225 m/s Elevation +45 to +85 Traverse 18 Fire control Sights C2 indirect fire sight with illumination Firepower Rate of fire 20 rpm maximum 15 rpm normal 1 to 12 rpm sustained Range 5.650 m maximum 100 m minimum Media 81mm L16A2 They function normally in light rain; however, heavy rain, sleet, or snow can cause an increase in the number of early bursts. b. The fuze consists of a brass head, body assembly, and expelling charge. (d) Firing is slowed if mask clearance must be checked before each firing but this can be eliminated if minimum mask clearance is determined. (2) The M84 fuze is a single-purpose, powder-train, mechanical-time fuze used with the 81-mm M301A1 and M301A2 illuminating cartridges. This section implements STANAG 2321 and QSTAG 900 (Edition 1). It has a time setting of up to 25 seconds. The safety pull wire is removed just before inserting the cartridge into the mortar. Additional information is included on an ammunition data card inside each container. Burst Height. M64A1 Sightunit. He rotates the socket so that the open end is pointing in the direction of fire. FIRING TABLE FOR CANNON, 155MM HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1B; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3; AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B; AND CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 FIRING PROJECTILE, GUIDED, M712 (COPPERHEAD) WITH SHAPED TRAJECTORIES (S&I BY PROP SEE DETAILS, FOOTNOTES), PROVISIONAL AIMING DATA FOR CANNON, 155MM, HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1B HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A4 AND CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 FIRING PROJECTILE, BASE-BURN, M864 AND M864A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), PRELIMINARY AIMING DATA FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HE, XM982 (S&I BY PROP SEE DETAILS, FOOTNOTES), PROVISIONAL AIMING DATA FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HE, XM982 (S&I BY PROP SEE DETAILS, FOOTNOTES), PROVISIONAL AIMING DATA FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HE, M982 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 165-MM GUN, M135 ON COMBAT ENGINEER VEHICLE, FULL TRACKED, M728; FIRING CARTRIDGE, 165-MM, HEP, M123A1 AND 165-MM, TP-T, XM623 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 175-MM GUN, M113 AND M113A1 ON GUN, FIELD ARTILLERY, SELF-PROPELLED: 175-MM, M107; FIRING PROJECTILE, HE, M437A2 AND M437A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), RAPID FIRE TABLES FOR CALCULATION OF THE EXECUTIVE OFFICERS (XOS) MINIMUM QUADRANT ELEVATION WITH CANNON, 105MM HOWITZER, M20A1 ON HOWITZER, LIGHT, TOWED, 105MM, M119A1; HOWITZER, LIGHT, TOWED, 105MM, M119A2; HOWITZER, LIGHT, TOWED, 105MM, M119A3 FIRING WITH PROPELLING CHARGES, M67 AND M200 (S&I BY PROP SEE DETAILS, FOOTNOTES), RAPID FIRE TABLES FOR CALCULATION OF THE EXECUTIVE OFFICER S (XO S) MINIMUM QUADRANT ELEVATION WITH CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5/A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1/A2 FIRING WITH PROPELLING CHARGES, M231, M232, AND M232A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), RAPID FIRE TABLES FOR CALCULATION OF THE EXECUTIVE OFFICERS (XOS) MINIMUM QUADRANT ELEVATION WITH CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6; AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A7, AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 AND HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING WITH PROPELLING CHARGES, M231, M232, AND M232A1 (S&I BY PROPONENT, SEE DETAILS, FOOTNOTES), ADDENDUM TO FTR LANCE-B-1 FOR WARHEAD SECTION, GUIDED MISSILE, HE: M251 (U) (S&I BY PROP SEE DETAILS, FOOTNOTES), Search Army publications and forms by Number, Title, or Record Detail. c. The moisture-resistant seal of the container is broken when the ammunition is to be used. c. The first ammunition bearer checks the barrel and ensures that--. The explosive elements in primers and fuzes are sensitive to shock and high temperature. Safety before firing is provided by a safety wire, which must be removed just before firing. During firing, the breech plug on the barrel is sealed and locked to the rotatable socket in the baseplate. .30, BROWNING, M1919A4 AND M2 (HEAVY BARREL), .30, M2 (REPRINTED W/BASIC INCL C1) (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, MACHINE: CAL. A proximity fuze is an electronic device that detonates a projectile by means of radio waves sent out from a small radio set in the nose of the projectile. SMALL DEFLECTION AND ELEVATION CHANGES. 0.30, BROWNING, M1917A1; GUN, MACHINE: CAL. The fuze should already be fitted to the cartridge. It has a time setting of up to 50 seconds. It is fitted with a safety wire and pin that are removed immediately before firing. Disposal Precautions. a. f. The open end of the socket must continue to point in the direction of fire. An official website of the United States government. A .mil website belongs to an official government organization in the United States. The mortar is within two turns of center of traverse. LHMBC. The propellant increments are ignited, which produce rapidly expanding gases that force the cartridge from the barrel. 81-mm MORTAR, M252 The 81-mm mortar, M252, delivers timely, accurate fires to meet the . *FREE* shipping on qualifying offers. 4-11. The M889 HE cartridge (M252 onlyXUS Marine Corps) is of the same construction as the M821 cartridge in every detail except the fuze, which is the M935. The propelling charge is contained in four horseshoe-shaped, felt-fiber containers or nine wax-tested, cotton cloth, bag increments. The bipod provides front support for the barrel and carries the gears necessary to lay the mortar. After the barrel cools, the gunner removes the sight and firing pin. The fuze has a safety wire that must be removed before firing. The mortar is within two turns of center of traverse. When set at delay, the fuze train causes a 0.05-second delay before functioning. As soon as the sight data are announced, the gunner places it on the sight, lays the mortar for elevation, and traverses onto the aiming post by turning the traversing handwheel and adjusting nut in the same direction. The fuze consists of a brass head, body assembly, and expelling charge. Excess increments should not accumulate near the mortar positions but are removed to a designated place of burning and destroyed. A locked padlock Do not burn increments in piles but spread them in a train 1 to 2 inches deep, 4 to 6 inches wide, and as long as necessary. The assistant gunner carries the bipod to the front of the barrel and places the bipod feet on the ground 12 to 15 inches in front of the baseplate and astride the line of fire. mortar, 81-mm: m29a1 and m29; firing cartridge, he, m374a2 and m374; cartridge, wp, m375a2 and m375 (s&i by prop see details, footnotes) ardec: ft 81-al-4(abr) active: 12/24/1970: firing tables for mortar, 81mm, m29 and m1 firing cartridge, illuminating, m301a3 with fuze, time, m84a1, height of burst, 600 meters (s&i by prop see details . He places the sight case and aiming posts to the left front of the mortar position. If water is not available, the gunner must stand clear of the mortar until the barrel is cool. The mortar is then re-laid on the aiming posts using the traversing crank. Referring and realigning aiming posts ensure that all mortars are set on the same data. With standard mortar, the maximum effective range is close to 4,000 metres; with a long-range system, this increases to nearly 4,500 metres. The propelling charge consists of an ignition cartridge and removable propellant increments. Figure 4-8. b. Prev - Mk6 Mortar range table for charge 0 Next - Mk6 Mortar range table for charge 2 . This section contains information on how to prepare the 81-mm mortar, M252, for firing, how to conduct safety checks, and, if a misfire should occur during firing, what actions the crew applies to remove the cartridge from the barrel. Barrel (with blast attenuator device) Notches in the setter engage ribs in the setting ring of the fuze. Both the M90 and M90A1 propellants are in nine wax-tested, cotton cloth, bag increments assembled to the tail unit. b. When targets are beyond such irregularities, a clearance of at least 30 meters should be allowed to ensure maximum effect over the target area. The leg-locking handwheel must then be tightened by hand, ensuring the teeth on either side are correctly meshed. 81MM M252A1. c. The first ammunition bearer ensures that each cartridge is clean, the safety pin is present, and the ignition cartridge is in good condition. He stands to the rear of the baseplate and supports the barrel until the bipod is fitted. a. Before the mortar is mounted, the squad must perform premount checks. The terms cannon and barrel are used interchangeably in this chapter. The body is made of aluminum and brass. The M734 multioption fuze is the only one used with the 81-mm mortar. c. The gunner grasps both ends of the traverse screw assembly and supports the mortar during the subsequent drill. The squad leader points to the exact spot where the mortar is to be mounted. The M252 81mm mortar is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. The assistant gunner places his right hand palm up (1 inch from the muzzle end) under the BAD and his left hand palm down (1 inch from the muzzle end) on top. He tightens the leg-locking handwheel (ensuring the teeth are correctly meshed) and fastens the securing strap over the arm and around the buffers. The following safety checks must be enforced before firing the mortar. Maximum Range (meters): 7,240 (with standard fuze) . a. The M853 cartridge (M252 only) has a cylindrical body that contains an illuminating candle and parachute assembly. (703) 614-3727, Office of the Chief Information Officer If the line of sight clears the mask, it is safe to fire. Red phosphorus rounds can be fired from the M29/M29A1 at a reduced charge (maximum charge = charge 2). M224A1 60 MM LWCMS Mortar The 60mm mortar, M224A1 Lightweight Company Mortar System (LWCMS), is a smoothbore, muzzle loaded, high angle of fire weapon. 4-12. The 60mm mortar section is located in the weapons platoon of the rifle company, is armed with three 60mm mortars, and is It was even a tool used by airborne units, and was dropped in parachute bundles during Operations Neptune, Market Garden, and Varsity. If the barrel is cool enough to handle, the crew removes the round as described below. (4) The leg-locking handwheel is hand tight. The barrel clamps are then closed. Red phosphorus/white phosphorus is used for screening, producing casualties, creating incendiary effects, and signaling. Training practice is used only for training. Developed by Hirtenberger Defence Systems (HDS), the rugged and reliable M8 comprises an 81 mm long-range weapon available in different barrel lengths, an entire range of ammunition, auxiliary field equipment, sighting systems and a fully digital fire-control system containing all ballistic data. High angles of approach (near vertical) give the lowest burst heights. Target terrain, such as ice and dry sand, gives lowest burst heights, whereas water and wet ground give highest burst heights. a. The entire squad stays with the mortar. With the mortar mounted and the sight installed, the gunner lays the sight on the two aiming posts (placed out 50 and 100 meters from the mortar) on a referred deflection of 2800 mils and an elevation of 1100 mils. Their firing positions and principal duties are as follows: a. At extreme temperatures (below -40 degrees Fahrenheit and above 125 degrees Fahrenheit), it is not unusual to experience an increase in malfunctions proportionate to the severity of conditions. [1] [2] Many countries use or used an 81 mm mortar in their armed forces. The cartridge uses the M205 propelling charge and is assembled with the M567 or M524-series fuze. It is a 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 influence. Cartridges assembled with the M532 fuze must be fired above charge 0. (1) Marking on container. In charge was the platoon commander - normally a lieutenant. During training, the gunner may use the driving stake from the aiming post case. (5) With the exception of a few unused increments (within the same ammunition lot number) as replacements for defective increments, excess powder should be removed from the mortar position. The M252 81mm medium extended range mortar (see diagram below) is a crew-served, smooth bore, muzzle loaded, high angle of fire weapon system. If you look at the table above, you'll see that at 1.5km range, 120mm mortars have nearly 33% more dispersion than 80mm mortars.Try testing 80mm mortars and 120mm mortars at 1.5km against . It is set using the bladed end of the M18 fuze wrench. The first table is a chart that shows range and elevation for firing particular mortar shells. This round must be stored in a vertical position. If, upon removal of the safety wire, a buzzing sound in the fuze is heard, the round should not be used. (4) The M567 fuze is an impact fuze that has a SQ/IMP or D function. The RSTA squadron only receives the 120mm mounted mortar, there is no augmentation dismounted maneuvers. The cartridge weighs about 9.12 pounds. The safety/packing clip should be removed when the cartridge is unpacked. (6) The primer cartridge is checked for damage or dampness. (3) The securing strap is correctly located, securing the barrel clamps and buffers to the plain leg. Joint Tables of Allowance; PB - Professional Bulletins; STP - Soldier Training Publications; TC - Training Circulars; . The mortar should be within two turns of center of traverse when the task is compete. General Dynamics Ordnance and Tactical Systems' 81mm Roll Controlled Guided Mortar (RCGM) provides an affordable, flexible solution to meet that need. Secure .mil websites use HTTPS The M1 became the standard American . Correctly applying and performing these duties enables the mortar section to perform as an effective fighting team. The gunner checks the baseplate and ensures that--. c. Crest Clearance. Red phosphorus cartridges (M252 only) are stored the same as HE cartridges. The gunner is given an administrative command to lay the mortar on a deflection of 2860 or 2740 mils. The cartridge must not be fired below charge 3. b. The air burst over average types of soil ranges from 1 to 6 meters, depending on the angle of approach. To prepare for firing, the slot is aligned in the striker with SQ or delay using the M18 fuze wrench. However, at temperatures above 32 degrees Fahrenheit and at angles greater than 1068 mils, the flight time is sufficient to permit arming. .50: BROWNING, M2 (HEAVY BARREL, TURRET TYPE) ON MOUNT, MACHINE GUN, TRAILER MTD: MULTIPLE CAL. The M1 was a derivative of the French mle 27/31 system (itself an improved form of the Stokes Trench Mortar of World War 1 fame) and slightly altered to suit American needs. From introduction up to halfway World War 2 the ML 3-inch had a poor range of up to 1.45 km. . The barrel clamp, which consists of an upper and lower clamp, is situated at the top. To dismount the mortar, the squad leader commands, OUT OF ACTION. Types of rounds, classification, and characteristics for the 81-mm mortar, M252. The assistant gunner cleans the bore and swabs it dry. Powered by Hugo. FT 81-AI-3 Firing Tables Mortar, 81mm: M28A1 and M29 Mortar 81mm Self propelled M125A1 and M125 Carrier, 81mm Mortar Tracked XM755 In addition to supervising the emplacement, laying, and firing of the mortar, he supervises all other squad activities. The upper clamp is fitted with a locking arrangement that consists of a curved handle and a spring-loaded locking rod, which is ball-shaped at its lower end. He must not stand directly behind the mortar. Tabular Firing Tables TFT ORDER FORM 1.Select "Mortar" 2.Select which mortar caliber 3.Select mortar system nomenclature 4.Select which TFTs to order 5.Put in quantity and click "Add TFTs" 6.Click "Next" TFT JUSTIFICATION 1.Put in TFT Ordering Justification 2.Click "Next" SHIPPING INFORMATION 1.Fill out all required fields Several types of RP/WP ammunition are described herein. The baseplate (Figure 4-5) is of one-piece construction, and supports and aligns the mortar for firing. (4) The bipod locking latch is locked, securing the barrel clamps. He then checks the sight picture to ensure he is within 20 mils of a proper sight picture. There is a selector on the lower shaft for non-delay or delay impact action. Cartridges assembled with the M532 fuze must be fired above charge 0. The M853 and M301A3 illuminating ammunition are described herein. The enemy will use them. (1) Mask clearance and overhead clearance are sufficient. b. Share sensitive information only on official, secure websites. Proximity fuzes withstand normal handling without danger of detonation or damage when in their original packing containers or when assembled to projectiles in their packing containers. c. Mechanical Time. One-quarter turn on the adjusting nut equals one turn of the traversing handwheel. Long Range PGK. It is designed to be fired in the indirect fire mode, cannot be fired handheld, and norm ally utilizes a FDC.