81mm mortar range table

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 . The settings are obtained from the range tables and are applied using a wrench (number 9239539) or a 1 3/4-turn open-end wrench. c. The first ammunition bearer checks the barrel and ensures that--. Theme by TechDoc. A spring-loaded locating catch is behind the elevating gear housing, which locates the plain leg in its supporting position for level ground. The M374 cartridge is fitted with the M90 propelling charge. 81-mm MORTAR, M252 The 81-mm mortar, M252, delivers timely, accurate fires to meet the . The explosive elements in primers and fuzes are sensitive to shock and high temperature. To set for delay, the selector slot should be rotated clockwise until it is aligned with the "D" mark on the ogive. f. If the above procedure fails to remove the misfire, the barrel must be kept horizontal. The aluminum tail assembly has six integral fins equally spaced around the rear, which stabilize the round in flight. Dropping may cause the propellant charges to ignite, causing bodily injuries. The fuze should already be fitted to the cartridge. Figure 4-8. 4-10. FT 81-AI-3 Firing Tables Mortar, 81mm: M28A1 and M29 Mortar 81mm Self propelled M125A1 and M125 Carrier, 81mm Mortar Tracked XM755 Table 4-1. Additional information is included on an ammunition data card inside each container. 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. If it is necessary to leave the ammunition uncovered, it should be raised on dunnage at least 6 inches above the ground. The M751 is fitted with a smoke charge that operates on impact. It can provide all-weather, ground-based, close supporting, accurate, immediately The M375A3 cartridge is ballistically similar to the M374A3 (HE) cartridge. It uses the M219 propelling charge and weighs about 9.1 pounds. Table 4-2. A lock ( The American M1 81mm Mortar, like the upcoming M2 60mm Mortar, was based on a French design by Edgar William Brandt (1880-1960). The baseplate (Figure 4-5) is of one-piece construction, and supports and aligns the mortar for firing. The lower clamp is shaped and bored on each side to house the buffer cylinders. The M374A2 and M374A1 cartridges are fitted with the M90A1 propelling charge. 81mm 120mm 60mm . The components of the mortar consist of a canon, sight, mount, and baseplate. LHMBC. Correct way to open an ammunition box. The first ammunition bearer shakes the barrel to dislodge any remnants from the last round fired, and he lowers the barrel into the rotating socket of the baseplate. The mortar squad consists of five men (Figure 4-1). He maintains the ammunition for firing and provides local security for the mortar position. . b. This ensures a maximum traversing and elevating capability after making the movement. Training practice--M879, M880, M68, and sabot. In charge was the platoon commander - normally a lieutenant. The following are authorized (Standard B) cartridges for the 81-mm mortar, M252: Each cartridge has fins around the tail to stabilize it in flight and to cause it to strike fuze-end first. 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. a. Point-Detonating. General Dynamics Ordnance and Tactical Systems' 81mm Roll Controlled Guided Mortar (RCGM) provides an affordable, flexible solution to meet that need. If required, the gunner/assistant gunner lowers the barrel so that the breech plug engages with the open end of the socket, and he uses the barrel as a lever to move the socket. After the barrel cools, the gunner removes the sight and firing pin. 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. Illuminating is used for battlefield illumination and signaling. This ensures that the mortar does not fire should the round slip down the barrel during the subsequent drills. The 81-mm mortar, M252, is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. The striker has been modified to be able to use German and Italian patterns of 81mm mortar . c. The assistant gunner moves into position to the front of the bipod on his right knee and grasps the bipod legs (palms up), lifting until they clear the ground enough to permit lateral movement. (7) When opening an ammunition box, the ammunition bearer ensures the box is horizontal to the ground, not nose- or fin-end up. The M252 81mm mortar is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. The cartridge is painted olive drab with yellow markings and weighs about 9.05 pounds. Propelling charges are covered or protected from dampness or heat. 4-4. The firing pin must be replaced and the bore swabbed. c. The assistant gunner lifts the bipod and stands it on its elevating leg so that the elevating handwheel is to the rear and the plain leg is to the front. If the round does not fire, the gunner tests the barrel for heat. A securing strap is attached to the plain leg for securing the bipod in the folded position. Red phosphorus cartridges (M252 only) are stored the same as HE cartridges. Target terrain, such as ice and dry sand, gives lowest burst heights, whereas water and wet ground give highest burst heights. This is the inert PD fuze type "IR-81" used by the Italians for their 81mm mortar rounds during WWII. 120mm IHE grenade DM91. f. The open end of the socket must continue to point in the direction of fire. After the mortar is mounted, the gunner makes a thorough check. b. He moves the mortar until the vertical line of the sight is aligned approximately on the aiming post. When targets are beyond such irregularities, a clearance of at least 30 meters should be allowed to ensure maximum effect over the target area. For those of you in the market for a Dummy/Display 81mm mortar, I hope this article can answer a few of your questions before you order. c. Upon receiving the command REFER, REALIGN AIMING POST, two actions take place at the same time in the mortar squad. .30 BROWNING, M1917 AND M1917A1; GUN, MACHINE, CAL. Proximity (VT). 4-11. It has a time setting of up to 50 seconds. This section discusses the characteristics and nomenclature of each component (Figure 4-2). The assistant gunner cleans the bore and swabs it dry. Lock Ammunition is made and packed to withstand all conditions ordinarily encountered in the field. This may preclude moving the bipod. The BAD is removed only by qualified maintenance personnel. In the U.S. Army and U.S. Marine Corps, it is normally deployed in the mortar platoon of an infantry battalion. Before the mortar is mounted, the squad must perform premount checks. Fort Belvoir, VA 22060 The M751 fuze is the only dummy fuze used with the 81-mm mortar. As a longstanding partner of armed forces around the globe, Rheinmetall supplies a wide array of mortar systems and ammunition. SQUAD AND SECTION ORGANIZATION AND DUTIES, Each member of the infantry mortar squad has principle duties and responsibilities. The first table is a chart that shows range and elevation for firing particular mortar shells. HE ammunition is used against personnel and materiel. The fuze threads and fuze well threads are inspected for damage. The fuze wrench, M18, assembles the fuze to the cartridge, and the bladed tip on the end sets PD-type fuzes. b. It provides illumination for about 60 seconds with 600,000 candlepower illumination. In addition to supervising the emplacement, laying, and firing of the mortar, he supervises all other squad activities. Despite its weight though, the 81mm mortar was an important part of the Table of Organization and Equipment of U.S. Army and U.S. Marine Corps maneuver battalions throughout World War II. Cartridges assembled with the M532 fuze must be fired above charge 0. (2) The M524-series fuze has two function settings: superquick/impact (SQ/IMP) and delay. a. a. The M821 HE cartridge (M252 only) is a British-made cartridge fitted with the US M734 multioption fuze. The 81mm weapons platoon consisted of the headquarters platoon and four mortar squads. On its right side, the clamp is recessed to receive the ball end of the locking rod. . d. The gunner removes the sight from its case, mounts it on the mortar, and sets a deflection of 3200 mils and an elevation of 1100 mils. He lays for deflection, taking the proper sight picture. The muzzle end has a short tapered lead-in which acts as a . c. Authorized Cartridges. Several types of HE ammunition are used in the 81-mm mortar, M252. a. (3) The securing strap is correctly located, securing the barrel clamps and buffers to the plain leg. When a large number of cartridges are needed for a mission, they may be removed from the containers and prepared. a. d. The M374A2, M374A1, and M374 HE cartridges are painted olive drab with yellow markings and are constructed from pearlitic malleable cast iron. He places the sight case and aiming posts to the left front of the mortar position. 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. This document (FT 81 B3, abridged) consists of two pages, each with a separate table. Agreed that mortars should generally be used close to the frontline. Both the 60mm and 120mm mortar rounds use White Phosphorus. Swifty 3 from scratch; Swifty 3 split-repo setup; Swifty Troubleshooting; Mods. on Amazon.com. The leg-locking handwheel must then be tightened, ensuring the teeth are correctly meshed. b. a. Fired . The fuzes may be used for day or night operations. Normally, it can be moved by hand, although this may be difficult to do if the mortar is moved through a large arc. OPERATOR`S MANUAL FOR MORTAR, 81-MM, M252 (NSN 1015-01-164-6651) (EIC 4SK){TM . The ammunition that can be fired by the 81-mm mortar, M252, is identified and described herein. A .mil website belongs to an official government organization in the United States. The mount consists of elevating and traversing mechanisms and a bipod (Figure 4-4). The cartridges are returned to their original containers. The fuze consists of a brass head, body assembly, and expelling charge. When fired, the cartridge carries the ignition cartridge with it, leaving the mortar ready for the next cartridge. (2) Burn all dead grass or brush within 30 meters around the burning place. The components of the mortar consist of a cannon, mount, and baseplate. (6) The primer cartridge is checked for damage or dampness. The mortar is then re-laid on the aiming posts using the traversing crank. The gunner levels the elevation bubble by turning the elevation micrometer knob and reading the setting on the elevation scale and elevation micrometer--this setting is the minimum mask clearance. g. The barrel clamps can be moved along the barrel to counter large changes in elevation. Mount, M177, in folded position. High explosive is used for both fragmentation and blast effect against personnel and light-skinned vehicles. The obturating ring ensures equal muzzle velocities in hot or cold barrels by keeping all the gases in the barrel until the cartridge has fired. ), FIRING TABLES FOR, CANNON, 155MM, HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1B HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A4 AND CANNON, 155MM, HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A6 AND CANNON, 155MM, HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM, HOWITZER, XM776 ON HOWITZER, MEDIUM, TOWED, 155MM, XM777 FIRING PROJECTILE, HE, M795 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5, M109A6 AND M109A7 AND CANNON, 155MM HOWITZER, M284A2 CHROME ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND M109A7 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777, M777A1 AND M777A2 AND CANNON, 155MM HOWITZER, M776 CHROME ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, SMOKE, WP, M1121 INCLUDES FIRING TABLES FOR PROPELLANTS: M119A2 (CHARGE 7R), M203A1 (CHARGE 8S), AND MODULAR ARTILLERY CHARGE SYSTEM (MACS) PROPELLANTS: M231 (CHARGES 1L AND 2L), M232 AND M232A1 (CHARGES 3H, 4H AND 5H) (S&I BY PROP SEE FOOTNOTES). .50: BALL, M2 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR WEAPON, 5.56MM, M16A1 WEAPON, 5.56MM, M16A2 WEAPON, 5.56MM, M249 AND WEAPON, 5.56MM, M4 FIRING CARTRIDGE, BALL, M855 CARTRIDGE, TRACER, M858 CARTRIDGE, BALL, M193 CARTRIDGE, TRACER, M196 (S&I BY PROP SEE DETAILS, FOOTNOTES), MACHINE GUN, 7.62-MM: M60 ON MOUNT, MACHINE GUN: 7.62-MM, M122 AND MACHINE GUN, 7.62-MM: M73 ON TANK, COMBAT, FULL-TRACKED: 105-MM GUN, M60 SERIES AND RIFLE, 7.62-MM: M14; FIRING CARTRIDGE, 7.62-MM, BALL, NATO, M59; CARTRIDGE, 7.62-MM, BALL, NATO, M80; CARTRIDGE, 7.62-MM: AP, NATO, M61 AND CARTRIDGE, 7.62-MM: TRACER, NATO, M62 (REPRINTED W/BASIC INCL C1) (S&I BY PROP SEE DETAILS, FOOTNOTES), ADDENDUM TO FT 8-Q-1 FOR PROJECTILE, HE, M404 (S&I BY PROP SEE DETAILS, FOOTNOTES), ADDENDUM TO FT 8-J-4 FOR PROJECTILE, HE, M404 (S&I BY PROP SEE DETAILS, FOOTNOTES), ADDENDUM TO FT 8-T-1 FOR PROJECTILE, HE: M509A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER, M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED, 8-INCH, M110A2 FOR LOW ANGLE FIRING PROJECTILE, HE, M509A1 USING REGISTRATION DATA FOR PROJECTILE, HE, M106 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER: M2 AND M2A1 ON HOWITZER, HEAVY, TOWED: 8-INCH, M115; CANNON, 8-INCH HOWITZER: M47 ON HOWITZER, HEAVY, SELF-PROPELLED, FULL TRACKED: 8-INCH, M55; CANNON, 8-INCH HOWITZER: M2A1E1 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110; FIRING PROJECTILE, HE: M106 AND PROJECTILE, CHEMICAL: M426 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER, M201 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110A1 AND CANNON, 8-INCH HOWITZER, M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110A2 AND FIRING PROJECTILE, HE, M106 PROJECTILE, CHEMICAL, M426 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER: M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED, 8-INCH, M110A2; FIRING PROJECTILE, HE, RA; M650 AND PROJECTILE, ATOMIC: M753 AND M753A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER, M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110A2 FIRING PROJECTILE, HE, M509A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 14.5-MM GUN, M31; ARTILLERY TRAINER FIRING FUZED CARTRIDGES, M181, M182 AND M183 (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, 20-MM, AUTOMATIC, M139; FIRING CARTRIDGE, 20-MM, HEIT, M599; CARTRIDGE, 20-MM, TPT, M206 AND CARTRIDGE, 20-MM, APIT, M601 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR CANNON, 25MM GUN, M242 ON INFANTRY FIGHTING VEHICLE, M3 FIRING CARTRIDGE, APDS-T, M791 CARTRIDGE, HEI-T, M792 CARTRIDGE, TP-T, M793 CARTRIDGE, TPDS-T, M910 (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, AUTOMATIC, 40-MM, M1 AND GUN, DUAL AUTOMATIC, 40-MM, M2; FIRING CARTRIDGE, HE-T, SD, MK 2 WITH FUZES, PD, MK 27, M64A1, M71 OR NO. The safety wire must be removed before firing. When a misfire occurs, any member of the squad immediately announces, "Misfire." The cartridge can be fitted with the M524-series, M526-series, M567, or M532 fuzes. Overhead interference can be branches of trees or roofs of buildings. Both legs are fitted with a disk-shaped foot with a spike beneath to prevent the mount from slipping. The fuze setter, M25, sets M84-series time fuzes. He has the duty of preparing the ammunition and passing it to the assistant gunner. e. The pull wire and safety wire are removed from the fuze just before firing. ) or https:// means youve safely connected to the .gov website. The squad leader indicates the direction of fire when mounting. 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. Attached to the arm is the cross-leveling mechanism, which is attached to the clamp assembly at its upper end. When the gunner is satisfied with his sight picture he announces, "Up.". (1) The M772A1 fuze is a MTSQ. Home; Swifty. 0.30, BROWNING, M1917A1; GUN, MACHINE: CAL. The body is made of aluminum and brass. It is fitted with a standard pull wire and safety pin that are removed immediately before firing.