81mm mortar range table

FT 81-AI-3 Firing Tables Mortar, 81mm: M28A1 and M29 Mortar 81mm Self propelled M125A1 and M125 Carrier, 81mm Mortar Tracked XM755 It is designed to be fired in the indirect fire mode, cannot be fired handheld, and norm ally utilizes a FDC. a. Point-Detonating. Mount Both legs are fitted with a disk-shaped foot with a spike beneath to prevent the mount from slipping. (2) Color code. (4) Extra increments are removed if the cartridge is to be fired with less than full charge. He levels all bubbles. The following safety checks must be enforced before firing the mortar. b. Powered by Hugo. This may cause the firing pin to ignite the charges if the cartridge is dropped on the fin end (. The powder increments, mainly, should not be exposed to direct sunlight. .50 MACHINE GUN, M3; FIRING CARTRIDGE, CAL. Complete cartridges are always handled with care. M1129 Mortar Carrier - Wikipedia As a longstanding partner of armed forces around the globe, Rheinmetall supplies a wide array of mortar systems and ammunition. The tabulated data of the 81-mm mortar, M252, are shown in Table 4-1. 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. e. The pull wire and safety wire are removed from the fuze just before firing. on Amazon.com. 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 explosive elements in primers and fuzes are sensitive to shock and high temperature. (1) The rotating socket is free to move in a complete circle. (a) Since the mortar is normally mounted in defilade, there could be a mask such as a hill, tree, building, or rise in the ground. It was even a tool used by airborne units, and was dropped in parachute bundles during Operations Neptune, Market Garden, and Varsity. These propellants are flash-suppressed and clean burning resulting in minimum residue, flash and blast overpressure. 120MM Mortar System. One-quarter turn on the adjusting nut equals one turn of the traversing handwheel. b. The gunner then kicks the barrel several times with his heel in an attempt to dislodge the round. An M18 fuze wrench is used to change settings. The M734 multioption fuze is the only one used with the 81-mm mortar. 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 . It is designed to be fired in the indirect fire mode, cannot be fired handheld, and normally utilizes a FDC. Overhead interference can be branches of trees or roofs of buildings. Both the 60mm and 120mm mortar rounds use White Phosphorus. The superior flow characteristics of these BALL POWDER . When fired, the cartridge carries the ignition cartridge with it, leaving the mortar ready for the next cartridge. The 81mm Mortar - The David of Modern Warfare | SOFREP Section I. 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. He releases the securing strap, loosens the leg-locking handwheel, and lowers the plain leg until the locating catch engages in the recess. c. Mechanical Time. If the barrel is cool enough to handle, the crew removes the round as described below. MFCS Dismounted. 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. c. The M374A3 HE cartridge is constructed from pearlitic malleable cast iron and contains about 2.10 pounds of composition B explosive. (4) The M567 fuze is an impact fuze that has a SQ/IMP or D function. b. He uses the chain of command to assist him in effecting his command and supervising duties. U.S. Mortars of World War II - World War Media When the gunner is satisfied with his sight picture he announces, "Up.". The fuze has a safety wire that must be removed before firing. The barrel clamp, which consists of an upper and lower clamp, is situated at the top. Short cartridges can be expected when firing below charge 4. He then checks the sight picture to ensure he is within 20 mils of a proper sight picture. M252 81mm Medium Mortar DESCRIPTION. The assistant gunner cleans the bore and swabs it dry. After the rounds have been removed, they should always be handled with two hands to prevent accidental dropping. Range Minimum to maximum 83 to 5,608 meters Rate of Fire . With the clamps facing away from him, the assistant gunner traverses the buffer carrier to the traversing handwheel and folds the handle. They are painted light green with red markings and one narrow yellow band. Excess increments should not accumulate near the mortar positions but are removed to a designated place of burning and destroyed. This ensures a maximum traversing and elevating capability after making the movement. The gunner is given an administrative command to lay the mortar on a deflection of 2860 or 2740 mils. The gunner removes the sight and places it in the case with 3200 deflection and 0800 elevation indexed. It is light enough to be portable when broken down into. [Firing and Deflection Conversion Tables] - The Portal to Texas History More uniform firing is obtained if ammunition is kept at the same temperature. The mortar should be within two turns of center of traverse when the task is compete. Ammunition is made and packed to withstand all conditions ordinarily encountered in the field. Propelling charges are covered or protected from dampness or heat. 60mm, 81mm, and 120mmMortar Increments. It uses the M205 propelling charge, consisting of four horseshoe-shaped increments fitted around the tail. REFER DEFLECTION TWO EIGHT SEVEN FIVE (2875), REALIGN AIMING POSTS. If, upon removal of the safety wire, a buzzing sound in the fuze is heard, the round should not be used. ) or https:// means youve safely connected to the .gov website. PDF 81-mm MORTAR, M252 - GlobalSecurity.org The adjustment ring has six raised ribs for use in conjunction with fuze setter, M25, and a setting indicator rib (marked SET) about half the height and width of the other six ribs. He is also the squad driver. 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. 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. In addition to loading, he swabs the bore after 10 rounds have been fired or after each fire mission. 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. Red phosphorus rounds can be fired from the M29/M29A1 at a reduced charge (maximum charge = charge 2). High explosive--M821, M889, M374-series, and M362. Those cartridges assembled with the M524 (A1, A2, A3, or A4) fuze are for use by the US Marine Corps and US Navy only. They should not be approached for 5 minutes or disturbed for at least 30 minutes after firing. MFCS Mounted. 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. Proximity (VT). Safety before firing is provided by a safety wire, which must be removed just before firing. The M821A2/821A1/889A1 consists of the following major components: M935 Point Detonating Fuze or M734/734A1 Multi-Option Fuze. c. The first ammunition bearer ensures that each cartridge is clean, the safety pin is present, and the ignition cartridge is in good condition. 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 . Correct way to open an ammunition box. (b) In selecting the exact mortar position, the leader looks quickly for mask clearance and overhead interference. 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. The 81-mm mortar, M252, is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. The gunner checks the baseplate and ensures that--. While the assistant gunner supports the barrel, the gunner slackens the leg-locking handwheel, releases the locating catch, and positions the plain leg. 120mm IHE grenade DM91. Training practice is used only for training. If the round does not fire, the gunner tests the barrel for heat. The fuzes may be used for day or night operations. The fuze wrench, M18, assembles the fuze to the cartridge, and the bladed tip on the end sets PD-type fuzes. The cartridge is painted olive drab with yellow markings and weighs about 9.05 pounds. If not, the cartridge is placed on its side, and the closing plug is removed using an M18 fuze wrench. 81MM SYSTEM | Hirtenberger Defense Systems This cartridge is ballistically matched to the M374A2, M374A1, and M375 HE cartridges, and weighs about 9.12 pounds. After the mortar is mounted, the gunner makes a thorough check. Red phosphorus/white phosphorus--M819 and M375-series. Designed by Thingsym. Mortars are indirect-fire weapon systems. f. The open end of the socket must continue to point in the direction of fire. The cartridge is dropped down the barrel, fin-end first. There must not be a visible gap between the fuze and cartridge body. The baseplate (Figure 4-5) is of one-piece construction, and supports and aligns the mortar for firing. It uses the M772 mechanical time fuze and weighs about 10.6 pounds. .50: BROWNING, M2 (HEAVY BARREL, TURRET TYPE) ON MOUNT, MACHINE GUN, TRAILER MTD: MULTIPLE CAL. The cartridge weighs about 9.12 pounds. The M853 cartridge (M252 only) has a cylindrical body that contains an illuminating candle and parachute assembly. Before the mortar is mounted, the squad must perform premount checks. e. The assistant gunner passes the round to the first ammunition bearer who inspects it for the cause of the misfire. He performs other duties as the squad leader directs. WP cartridges are stored with the fuze end up. The fuze setter, M25, sets M84-series time fuzes. b. The platoon leader commands the platoon and supervises the training of the elements. 0.30, BROWNING, M1917A1; GUN, MACHINE: CAL. The fuze is nicely marked and is dated 1940. Fuze, PD, for 81mm mortar rounds, Italy, WWII, inert At the command, MARCH ORDER, the squad places the mortar, equipment, and ammunition in the squad vehicle and trailer. If it is necessary to leave the ammunition uncovered, it should be raised on dunnage at least 6 inches above the ground. b. a. 4-4. The air burst over average types of soil ranges from 1 to 6 meters, depending on the angle of approach. REFERRING OF THE SIGHT AND REALIGNMENT OF AIMING POSTS USING M64 SIGHT. The safety pull wire is removed just before inserting the cartridge into 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 107 Army Pentagon 81mm L16 | Weaponsystems.net The fuze threads and fuze well threads are inspected for damage. Ammunition is typed according to use (Table 4-2). 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 When a misfire occurs, any member of the squad immediately announces, "Misfire." High angles of approach (near vertical) give the lowest burst heights. (2) The breech plug is screwed tightly to the barrel. 81mm, 82 mm & 120 mm Medium and Heavy Mortars - GICHD Standard A ammunition for the M29A1 mortar is Standard B for the M252 mortar (, Light green Yellow band with red markings. The components of the mortar consist of a cannon, mount, and baseplate. He lays for deflection, taking the proper sight picture. The traversing screw assembly is fitted to the clamp assembly, which is pivoted in the center on an arm attached to the elevating leg. It has a time setting of up to 25 seconds. The assistant gunner exposes 8 inches (200 millimeters) of elevation shaft, leaving the elevation handwheel unfolded. c. The moisture-resistant seal of the container is broken when the ammunition is to be used. Joint Program Executive Office for Armaments & Ammunition PDF Principles of Fire Support B2c0289xq Student Handout

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