f. The open end of the socket must continue to point in the direction of fire. At the muzzle end is a cone-shaped blast attenuator device (BAD) that is fitted to reduce noise. Its range and explosive power is greater than the M224, yet it is still light enough to be man . Table 4-3. The mortar squad consists of five men (Figure 4-1). CANNON . ), 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. It is used for records such as reports on condition, malfunctions, and accidents. While the assistant gunner supports the barrel, the gunner slackens the leg-locking handwheel, releases the locating catch, and positions the plain leg. He is also the squad driver. They should not be approached for 5 minutes or disturbed for at least 30 minutes after firing. 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. 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) . b. The cartridge is painted light green and has red markings and one narrow yellow band. This is accomplished by depressing the barrel until the top of the mask is clear. LHMBC. The traversing screw assembly is fitted to the clamp assembly, which is pivoted in the center on an arm attached to the elevating leg. M3A1 Baseplate Swifty 3 from scratch; Swifty 3 split-repo setup; Swifty Troubleshooting; Mods. This round must be stored in a vertical position. It uses the M772 mechanical time fuze and weighs about 10.6 pounds. Proximity (VT). 1:4 For the 81MM Mortar System: X NSN (LIN): 1015-01-441-3113 : STAFF SECTION, CLEANING, ARTILLERY 1:4: Proximity-fuzed short cartridges, which are duds, contain a complete explosive train and impact element. Features: 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 previous 81mm mortar. If not, he may still fire at the desired range by selecting a charge zone having a higher elevation. b. MC Medical Guide; Client-side mods; TFAR 1.x for players; The platoon leader commands the platoon and supervises the training of the elements. The M252 system . The M853 cartridge (M252 only) has a cylindrical body that contains an illuminating candle and parachute assembly. 4-4. Placing the mortar in position at night does not relieve the gunner of the responsibility of checking for mask clearance and overhead interference. (1) The M772A1 fuze is a MTSQ. The M29 would become the standard American mortar in the upcoming Vietnam War. I have included my order history, detailed photos, as well as my personal opinion on International Military Antiques, IMA -USA www.ima-usa.com 81mm Display Mortar that they have for sale. Safety before firing is provided by a safety wire, which must be removed just before firing. The ignition cartridge strikes the firing pin and detonates, which causes a flash that passes through the radial holes in the shaft. The components of the mortar consist of a cannon, mount, and baseplate. That is generally how I use mortars. (4) The blast attentuator device is secured correctly. .50: AP, M2 AND CARTRIDGE, CAL. Correctly applying and performing these duties enables the mortar section to perform as an effective fighting team. He maintains the ammunition for firing and provides local security for the mortar position. The safety pull wire is removed just before inserting the cartridge into the mortar. Trenches are dug to prevent water from flowing under the pile. Short cartridges can be expected when firing below charge 4. Mount, M177, in folded position. The pile is covered with a double thickness of tarpaulin. The M301A3 cartridge has a cylindrical body that contains an illuminating candle and parachute assembly. A safety latch located at the side of the recess is used to secure the ball. Long Range PGK. The cartridge uses the M218 propelling charge, which consists of four horseshoe-shaped increments fitted around the tail. The propellant increments are ignited, which produce rapidly expanding gases that force the cartridge from the barrel. The M734 multioption fuze is the only one used with the 81-mm mortar. Referring and realigning aiming posts ensure that all mortars are set on the same data. It is painted white with black markings. c. The gunner grasps both ends of the traverse screw assembly and supports the mortar during the subsequent drill. Figure 4-7. c. The M375A2, M375A1, and M375 cartridges may also be used. .50 MACHINE GUN, M3; FIRING CARTRIDGE, CAL. The company level vehicles also carry a vehicle-mounted 120mm mortar, which is augmented by the 60mm M224 mortar for dismounted use. g. The barrel clamps can be moved along the barrel to counter large changes in elevation. Identification. However, since explosives are affected by moisture and high temperature, they must be protected. The tabulated data of the 81-mm mortar, M252, are shown in Table 4-1. The wrench (P/N 9349539) sets M772 MT and M768 time fuzes. M252 81mm Mortars The M252 81mm medium extended range mortar (see diagram below) is a crew-served, smooth bore, muzzle loaded, high angle of fire weapon system. Following the arm-and-hand signals of the gunner (who is looking through the sight unit), he moves the far aiming post so that the gunner obtains an aligned sight picture. 4-12. 107 Army Pentagon The M751 fuze is the only dummy fuze used with the 81-mm mortar. The striker has been modified to be able to use German and Italian patterns of 81mm mortar . Figure 4-4. Section I. Red phosphorus/white phosphorus--M819 and M375-series. The increments are individually wrapped with waterproof bags that are not removed. on Amazon.com. It weighs about 9.05 pounds. (3) The securing strap is correctly located, securing the barrel clamps and buffers to the plain leg. It is especially useful if the baseplate sinks deep into the ground during prolonged firing. Secure .mil websites use HTTPS If the barrel is cool enough to handle, the crew removes the round as described below. (See FM 7-90 for a discussion of the duties of the platoon headquarters.). (5) Do not leave unused increments unburned in combat operational areas. The mortar also offered the promised increase in range as well, allowing fire teams to engage the enemy at distance. 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. ), 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). End this starting train with not less than 1 meter of inert material (dry grass, leaves, or newspapers). It engages the 1 3/4-inch flats on the setting ring or the fuze head. The fuze has a safety wire that must be removed before firing. 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. This section discusses the characteristics and nomenclature of each component (Figure 4-2). MORTAR RANGE: 500M X 100M X: FIELD TRAINING AREA 40000 Sq Ft: X STORAGE BUILDING, GENERAL PURPOSE, INSTALLATION: Area to store excess equipment X: ORGANIZATIONAL STORAGE BUILDING Arms room for Mortar equipment: X . They are fuzed with the M524-series, M256-series, or M532. Other armies count on 81mm mortar families. a. The gunner is given a deflection change between 5 and 25 mils, either increasing or decreasing from the last stated deflection, and the command to refer and realign aiming posts. ) or https:// means youve safely connected to the .gov website. WP cartridges are stored with the fuze end up. The contents of ammunition containers are shown by markings. It has two types: type 1 resembles the M734 fuze, and type 2 resembles the M935 fuze. 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. Check the post SOP before applying the following procedure: (1) Select a place at least 100 meters from the mortar position, parked vehicles, and ammunition piles. The leg-locking handwheel must then be tightened, ensuring the teeth are correctly meshed. The 81mm weapons platoon consisted of the headquarters platoon and four mortar squads. d. The gunner recovers the baseplate to the area designated by the squad leader. It uses the M185 propelling charge that consists of eight increments fitted into the spaces between the fins and held by a propellant holder. c. The M374A3 HE cartridge is constructed from pearlitic malleable cast iron and contains about 2.10 pounds of composition B explosive. The M374A2 and M374A1 cartridges are fitted with the M90A1 propelling charge. b. He moves the mortar until the vertical line of the sight is aligned approximately on the aiming post. 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). In charge was the platoon commander - normally a lieutenant. SQUAD AND SECTION ORGANIZATION AND DUTIES, Each member of the infantry mortar squad has principle duties and responsibilities. It has a time setting of up to 25 seconds. Fuzes are not disassembled. 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 M853 and M301A3 illuminating ammunition are described herein. After the mortar is mounted, the gunner makes a thorough check. The components of the mortar consist of a cannon, mount, and baseplate. Notches in the setter engage ribs in the setting ring of the fuze. It is set using the bladed end of the M18 fuze wrench. 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. They function normally in light rain; however, heavy rain, sleet, or snow can cause an increase in the number of early bursts. 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. The cartridge weighs about 9.4 pounds. The gunner places the outer edge of the baseplate against the baseplate stake so that the left edge of the cutaway portion of the baseplate is aligned with the right edge of the stake (Figure 4-7). He releases the securing strap, loosens the leg-locking handwheel, and lowers the plain leg until the locating catch engages in the recess. If water is not available, the gunner must stand clear of the mortar until the barrel is cool. In addition to supervising the emplacement, laying, and firing of the mortar, he supervises all other squad activities. This document (FT 81 B3, abridged) consists of two pages, each with a separate table. (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. To set for delay, the selector slot should be rotated clockwise until it is aligned with the "D" mark on the ogive. The explosive elements in primers and fuzes are sensitive to shock and high temperature. To prepare for firing, the slot is aligned in the striker with SQ or delay using the M18 fuze wrench. 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 (1) Mask clearance and overhead clearance are sufficient. He has the duty of preparing the ammunition and passing it to the assistant gunner. Maximum Range (meters): 7,240 (with standard fuze) . Each round is stenciled with the ammunition lot number, type of round, type of filler, and caliber. e. The squad leader picks up the aiming posts and sight. Firing tables are used to determine the correct charge for firing. All PD fuzes are superquick--detonate on impact. The 81mm mortar is a portable, mobile, medium mortar at the infantry's disposal. b. d. Multioption. It can provide all-weather, ground-based, close supporting, accurate, immediately 4-11. An air cavity can form on one side of a cartridge to unbalance it, causing instability in flight. Both the M90 and M90A1 propellants are in nine wax-tested, cotton cloth, bag increments assembled to the tail unit. In the U.S. Army and U.S. Marine Corps, it is normally deployed in the mortar platoon of an infantry battalion. LARGE DEFLECTION AND ELEVATION CHANGES. .30 BROWNING, M1917 AND M1917A1; GUN, MACHINE, CAL. Mount The Mark 4 and 5 barrels were introduced during World War 2 and have a much increased range. It was even a tool used by airborne units, and was dropped in parachute bundles during Operations Neptune, Market Garden, and Varsity. The fuze setter, M25, sets M84-series time fuzes. The mount consists of elevating and traversing mechanisms and a bipod (Figure 4-4). The mortar is then re-laid on the aiming posts using the traversing crank. This may cause the firing pin to ignite the charges if the cartridge is dropped on the fin end (. 81MM M252A1. Safety before firing is provided by a safety wire, which must be removed just before firing. The mortar is mounted and the sight is installed. It is fitted with a standard pull wire and safety pin that are removed immediately before firing. They use the M5 propelling charge that consists of eight cloth bags attached to the tail unit. If the round does not fire, the gunner tests the barrel for heat. It has no safety pins or wires to reduce preparation time. All mortar cartridges are painted to prevent rust and to identify their type. The fuze is nicely marked and is dated 1940. On its right side, the clamp is recessed to receive the ball end of the locking rod. One-quarter turn on the adjusting nut equals one turn of the traversing handwheel. FT 81-AI-3 Firing Tables Mortar, 81mm: M28A1 and M29 Mortar 81mm Self propelled M125A1 and M125 Carrier, 81mm Mortar Tracked XM755
How To Play Boneworks On Oculus Quest 2 Wireless, For Sale By Owner Washington Crossing, Pa, Why Was The Controlled Substance Act Created, Present Value Of Lease Calculator, Articles OTHER