81mm mortar range table

Swifty 3 from scratch; Swifty 3 split-repo setup; Swifty Troubleshooting; Mods. The gunner removes the sight and places it in the case with 3200 deflection and 0800 elevation indexed. The baseplate (Figure 4-5) is of one-piece construction, and supports and aligns the mortar for firing. If the fuze does not function as set, it automatically functions at the next lower setting. If the primer of the ignition cartridge is dented, the first ammunition bearer attempts to replace the safety wire and places the round in a marked, safe location for disposal by ordnance personnel. c. The M374A3 HE cartridge is constructed from pearlitic malleable cast iron and contains about 2.10 pounds of composition B explosive. .50: BROWNING, M2 (HEAVY BARREL, FLEXIBLE) ON MOUNT, MACHINE GUN, TRIPOD MTD, CAL. 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. Then it is removed from the bipod and laid horizontally on the ground at the dud pit until it can be turned over to ordnance personnel. The cartridge is dropped down the barrel, fin-end first. The barrel is then rotated a quarter turn to unlock it from the socket, and it is placed in an area designated by the squad leader. The M252 81mm medium extended range mortar (see diagram below) is a crew-served, smooth bore, muzzle loaded, high angle of fire weapon system. The mount consists of elevating and traversing mechanisms and a bipod (Figure 4-4). Attached to the right of the screw is the traversing handwheel. Powered by Hugo. When fired, the cartridge carries the ignition cartridge with it, leaving the mortar ready for the next cartridge. The M29 would become the standard American mortar in the upcoming Vietnam War. The assistant gunner checks the bipod and ensures that--. The components of the mortar consist of a canon, sight, mount, and baseplate. Each squad member should be able to perform all the following premount checks: a. 1:4 For the 81MM Mortar System: X NSN (LIN): 1015-01-441-3113 : STAFF SECTION, CLEANING, ARTILLERY 1:4: The components of the mortar consist of a cannon, mount, and baseplate. The squad leader indicates the direction of fire when mounting. MFCS Dismounted. The M853 and M301A3 illuminating ammunition are described herein. He may assist the gunner in shifting the mortar when the gunner is making large deflection changes. .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 M252 is highly accurate up to ranges of 4500m to 5700m depending on the The mortar also offered the promised increase in range as well, allowing fire teams to engage the enemy at distance. The firing pin must be replaced and the bore swabbed. 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. e. Dummy. He is also the squad driver. At the muzzle end is a cone-shaped blast attenuator device (BAD) that is fitted to reduce noise. They should not be approached for 5 minutes or disturbed for at least 30 minutes after firing. In any case, the gunner must ensure that the cartridge does not strike an obstacle. b. The mortar should be within two turns of center of traverse when the task is compete. Examples are: An 81 mm mortar is a medium-weight mortar. The mortar is within two turns of center of traverse. MFCS Mounted. SMALL DEFLECTION AND ELEVATION CHANGES. The gunner checks the baseplate and ensures that--. a. He places his thumbs alongside the forefingers, being careful to keep both hands away from the muzzle. The section leader, acting as FDC, has one deflection instead of two or more. e. The gunner centers the elevation bubble. That is generally how I use mortars. (d) Firing is slowed if mask clearance must be checked before each firing but this can be eliminated if minimum mask clearance is determined. The enemy will use them. If water is not available, the gunner must stand clear of the mortar until the barrel is cool. 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. Official websites use .mil M3A1 Baseplate If the mortar section is to operate quickly and effectively in accomplishing its mission, mortar squad members must be proficient in individually assigned duties. After the bands are broken and the box opened, the rounds should be removed by allowing them to roll out along the lid of the box (Figure 4-8). Joint Tables of Allowance; PB - Professional Bulletins; STP - Soldier Training Publications; TC - Training Circulars; . The sight is laid on 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. ), FIRING TABLES 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 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, HE, M483A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), 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, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 FIRING PROJECTILE, HERA, M549 PROJECTILE, HERA, M549A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES 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; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A4 AND 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, HERA, M549 AND PROJECTILE, HERA, M549A1 (S&I BY PROPONENT, SEE DEAILS, FOOTNOTES. He exposes 4 inches (100 millimeters) of elevation shaft and folds the handle. The M532 fuze is a radio doppler fuze that has a proximity (PROX) or SQ/IMP function. 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. The fuzes may be used for day or night operations. During training, the gunner may use the driving stake from the aiming post case. 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 . The wrench (P/N 9349539) sets M772 MT and M768 time fuzes. Fort Belvoir, VA 22060 81mm 120mm 60mm . Disposal Precautions. (b) In selecting the exact mortar position, the leader looks quickly for mask clearance and overhead interference. General Dynamics Ordnance and Tactical Systems' 81mm Roll Controlled Guided Mortar (RCGM) provides an affordable, flexible solution to meet that need. To make the shift, the gunner places the fingers of his right hand in the muzzle and his left hand on the left leg. When a misfire occurs, any member of the squad immediately announces, "Misfire." 0.50, M8 (REPRINTED W/BASIC INCL C1-2) (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR MACHINE GUN, CALIBER .50: BROWNING, M2 (HEAVY BARREL, TURRET TYPE) ON MOUNT, MACHINE GUN, TRAILER MOUNTED: MULTIPLE CALIBER .50 MACHINE GUN, M55 FIRING CARTRIDGE, CALIBER .50: API, M8 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR MACHINE GUN, CALIBER .50: FICED, M85 TANK, COMBAT, FULL TRACKED: 105MM GUN, M60 SERIES FIRING CARTRIDGE, CALIBER .50: API, M8 CARTRIDGE, CALIBER .50: API-T M20 CARTRIDGE, CALIBER .50: BALL, M33 CARTRIDGE, CALIBER .50: TRACER, M17 (S&I BY PROP SEE DETAILS, FOOTNOTES), MACHINE GUN, CAL. The M252 81 mm medium weight mortar is a British designed 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. a. Point-Detonating. He exposes 1 inch (25 millimeters) of cross-level shaft and folds the handle. When the baseplate is in position, the first ammunition bearer lowers the breech plug into the rotating socket and rotates the barrel a quarter of a turn to lock it. He places firing data on the sight and lays the mortar for deflection and elevation. Table 4-3. The entire squad stays with the mortar. He performs other duties as the squad leader directs. e. The squad leader picks up the aiming posts and sight. The fuze setter, M25, sets M84-series time fuzes. Red phosphorus rounds can be fired from the M29/M29A1 at a reduced charge (maximum charge = charge 2). Complete cartridges are always handled with care. 4-10. The M751 fuze is the only dummy fuze used with the 81-mm mortar. It is painted white with black markings. Identification. (2) The fin and fuze assembly must be checked for tightness and damage. The floating firing pin located within the primer has approximately 1/16 of an inch to move around. M252A1 81mm Mortar: Maximum Range (meters): 5,935; Ammunition: War reserve HE (M821A3), red phosphorus smoke (M819), visible light illumination (M853A1), infrared illumination (M816), war reserve and training HE (M889A4), and FRP . The M252 81 mm medium weight mortar is a British-designed 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. The equipment is placed out the same as for the gunner's examination (Chapter 9). It has two types: type 1 resembles the M734 fuze, and type 2 resembles the M935 fuze. The cartridge is painted olive drab with yellow markings. In charge was the platoon commander - normally a lieutenant. It contains white phosphorus that produces white smoke on contact with air. Figure 4-4. The fuze should already be fitted to the cartridge. 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 . He lays for deflection, taking the proper sight picture. News. SQUAD AND SECTION ORGANIZATION AND DUTIES, Each member of the infantry mortar squad has principle duties and responsibilities. It weighs about 9.05 pounds. (1) The rotating socket is free to move in a complete circle. 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. b. b. 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. 9301 Chapek Road., Bldg.1458 b. After the barrel cools, the gunner removes the sight and firing pin. (2) The M84 fuze is a single-purpose, powder-train, mechanical-time fuze used with the 81-mm M301A1 and M301A2 illuminating cartridges. The standard infantry support weapon is the M-252 81mm mortar, which lobs a 10 lb. The M252 system . c. Mechanical Time. .50: AP, M2 AND CARTRIDGE, CAL. d. The M374A2, M374A1, and M374 HE cartridges are painted olive drab with yellow markings and are constructed from pearlitic malleable cast iron. All PD fuzes are superquick--detonate on impact. The following safety checks must be enforced before firing the mortar. 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. Agreed that mortars should generally be used close to the frontline. The leg-locking handwheel must then be tightened, ensuring the teeth are correctly meshed. 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. The ignition cartridge (with primer) is fitted into the base of the fin shaft. He places the sight case and aiming posts to the left front of the mortar position. (2) Burn all dead grass or brush within 30 meters around the burning place. Training practice--M879, M880, M68, and sabot. The M853 cartridge (M252 only) has a cylindrical body that contains an illuminating candle and parachute assembly. The body is made of aluminum and brass. .50 MACHINE GUN, M55 AND MACHINE GUN, CAL. The vertical cross line of the sight is on the left edge of the aiming point. 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. e. The second ammunition bearer stands to the right rear of the mortar behind the ammunition bearer. The M301A3 cartridge has a cylindrical body that contains an illuminating candle and parachute assembly. d. The gunner rough levels the cross-level bubble by making the bubble bounce from one side to the other. (5) Four inches of elevation shaft are exposed, and the shaft is not bent. 81-mm MORTAR, M252 The 81-mm mortar, M252, delivers timely, accurate fires to meet the . Fired . All rounds are colored according to their type. The cartridge can be fitted with the M524-series, M526-series, M567, or M532 fuzes. From introduction up to halfway World War 2 the ML 3-inch had a poor range of up to 1.45 km. The gunner should expose 6 inches (150 millimeters) of elevation shaft and center the buffer carrier. c. The assistant gunner stands to the right of the mortar, facing the barrel and ready to load. HE ammunition is used against personnel and materiel. 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 He ensures that the firing pin recess is facing upwards. a. b. The safety pull wire is removed just before inserting the cartridge into the mortar. It is designed to be fired in the indirect fire mode, cannot be fired handheld, and norm ally utilizes a FDC. The assistant gunner cleans the bore and swabs it dry. As a longstanding partner of armed forces around the globe, Rheinmetall supplies a wide array of mortar systems and ammunition. The M821/M889 are 81mm HE Mortar Cartridges. 4-4. b. Remaining increments are repositioned towards the rear of the tail fin assembly when firing the cartridge with horseshoe-shaped increments at less than full charge. b. General Dynamics Ordnance and Tactical Systems is the leading manufacturer of propellants for 60mm, 81mm and 120mm Mortar Systems. on Amazon.com. high-explosive bomb at a range of about three miles. Finally, the assistant gunner loosens the leg-locking handwheel, presses the spring-loaded locating catch, and raises the plain leg behind the buffer cylinders until it touches the traversing handwheel. If the barrel is hot, the gunner may then apply water to the outside of the barrel until it is cool. (e) If the mask is not regular throughout the sector of fire, the gunner determines the minimum mask clearance as described above. The gunner can depress the barrel, if necessary, to provide easier access to the firing pin. 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 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A4 AND 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, HE, M795 PROJECTILE, HE, M795 IM PROJECTILE, HE, M1122 PROJECTILE, IR ILLUMINATING, M1123 PROJECTILE, ILLUMINATING, M1124 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 DETAILS, FOOTNOTES) . An internal clock mechanism provides nine seconds of safe air travel (610 to 2,340 meters along trajectory for charge 0 through 9, respectively). A .mil website belongs to an official government organization in the United States. Referring and realigning aiming posts ensure that all mortars are set on the same data. Cartridges assembled with the M532 fuze must be fired above charge 0. WP cartridges are stored with the fuze end up. ), 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). This is the inert PD fuze type "IR-81" used by the Italians for their 81mm mortar rounds during WWII. With the clamps facing away from him, the assistant gunner traverses the buffer carrier to the traversing handwheel and folds the handle. It uses the M205 propelling charge, consisting of four horseshoe-shaped increments fitted around the tail. (3) The M84A1 fuze is a single-purpose, tungsten-ring, mechanical-time fuze used with the 81-mm M301A3 illumination cartridge. After the rounds have been removed, they should always be handled with two hands to prevent accidental dropping. Maximum Range (meters): 7,240 (with standard fuze) . 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 increments are individually wrapped with waterproof bags that are not removed. Excess increments should not accumulate near the mortar positions but are removed to a designated place of burning and destroyed. REFERRING OF THE SIGHT AND REALIGNMENT OF AIMING POSTS USING M64 SIGHT. He opens the cross-level handwheel, traversing handwheel, and barrel clamp. The gunner is given an administrative command to lay the mortar on a deflection of 2860 or 2740 mils. It uses the M772 mechanical time fuze and weighs about 10.6 pounds. The components of the mortar consist of a cannon, mount, and baseplate. However, since explosives are affected by moisture and high temperature, they must be protected. A securing strap is attached to the plain leg for securing the bipod in the folded position. Figure 4-7. If the barrel is cool enough to handle, the crew removes the round as described below. (703) 614-3727, Office of the Chief Information Officer The cartridge must not be fired below charge 3. Close approach to crests, trees, towers, large buildings, parked aircraft, mechanized equipment, and similar irregularities causes functioning at heights greater than average level. (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. Mount The 81-mm mortar, M252, is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. 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. They are assembled with either an M524-series, M526-series, or M567 fuze. The propelling charge consists of an ignition cartridge and removable propellant increments. (4) Extra increments are removed if the cartridge is to be fired with less than full charge. b. To convert the fuze from PROX to SQ/IMP, the top of the fuze must be rotated 120 degrees (one-third turn) in either direction. (4) The blast attentuator device is secured correctly. b. c. The assistant gunner disengages the barrel clamps and moves the bipod from the immediate area of the mortar position. . News. c. The first ammunition bearer checks the barrel and ensures that--. It uses the M185 propelling charge that consists of eight increments fitted into the spaces between the fins and held by a propellant holder. 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.] I say 120s are bad because they suffer from terrible dispersion even when not shooting at 6km. (3) Markings on rounds. The term "danger close" is included in the call for fire when there are friendly troops or positions within a prescribed distance of the target, specifically 600 meters for artillery or mortars . When set at SQ, the fuze functions on point impact or graze contact. b. The gunner stands to the left side of the mortar where he can manipulate the sight, elevating handwheel, and traversing handwheel. Red phosphorus/white phosphorus is used for screening, producing casualties, creating incendiary effects, and signaling. The gunner moves the mortar as the assistant gunner steadies it. 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. 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. e. Care, Handling, and Preservation. These cartridges are used first in subsequent firing so that once-opened stocks can be kept to a minimum. Red phosphorus/white phosphorus--M819 and M375-series. (4) The leg-locking handwheel is hand tight. c. The moisture-resistant seal of the container is broken when the ammunition is to be used.

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