4.2 inch mortar manual
LINK 1 ENTER SITE >>> Download PDF
LINK 2 ENTER SITE >>> Download PDF
File Name:4.2 inch mortar manual.pdf
Size: 2324 KB
Type: PDF, ePub, eBook
Category: Book
Uploaded: 28 May 2019, 18:47 PM
Rating: 4.6/5 from 580 votes.
Status: AVAILABLE
Last checked: 2 Minutes ago!
In order to read or download 4.2 inch mortar manual ebook, you need to create a FREE account.
eBook includes PDF, ePub and Kindle version
✔ Register a free 1 month Trial Account.
✔ Download as many books as you like (Personal use)
✔ Cancel the membership at any time if not satisfied.
✔ Join Over 80000 Happy Readers
4.2 inch mortar manualSome features of WorldCat will not be available.By continuing to use the site, you are agreeing to OCLC’s placement of cookies on your device. Find out more here. Numerous and frequently-updated resource results are available from this WorldCat.org search. OCLC’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus issues in their communities.However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied. Please enter recipient e-mail address(es). Please re-enter recipient e-mail address(es). Please enter your name. Please enter the subject. Please enter the message. Please select Ok if you would like to proceed with this request anyway. All rights reserved. You can easily create a free account. Please try again.Please try again.Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Register a free business account If you are a seller for this product, would you like to suggest updates through seller support ? Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness. This manual supersedes FM 23-92, 1 March 1945, and DA Training Circulars 3 and 10, 1950. This manual represents the state of knowledge and state of practice during the Korean War. Codice inventario libreria 45984We focus on the individual, and Please contact us with your wants, as we Please ask us to hold a book for you before you mail your check. Books are returnable within 7 days, if not satisfactory. MD residents add 6 state sales tax. The mailing address for Ground Zero Books, Ltd.http://www.barefoot.pl/userfiles/bosch-maxx-wfl-1200-manual-pdf.xml
- Tags:
- 4.2 inch mortar manual, 4.2 inch mortar manual pdf, 4.2 inch mortar manual download, 4.2 inch mortar manual instructions, 4.2 inch mortar manual free, 4.2 inch mortar model.
(a subchapter-S corporation) is P.O. Box 8369, Silver Spring, MD 20907-8369.Shipping costs are based on books weighing 2.2 LB, or 1 KG. If your book order is heavy or oversized, we may contact you to let you know extra shipping is required. Indirizzo: Silver Spring, MD, U.S.A. Libreria AbeBooks dal: 14 agosto 1998 Tutti i diritti riservati. Contents Mortar Material); Sights, M2A3, M2A1, M2 (For 81-mm Mortar Material)(SeptemberBattalion Weapons Training Packet (Mortar)(1974); M49A2E2, Cartridge, Smoke, WP, M302E1(March 1967); 18 pages Price 2.00Mount M5, 60-mm Mortar Baseplate M1; 81-mm Mortars M1 and M4, M23A1, M23A2, andMortar, 60-mm, Lightweight Company M224Lightweight Company M224 (April 1981) (Including Changes 1-3); 103 pages,Repair Parts and Special Tools List (Including Depot Maintenance Repair PartsMortar Baseplates M23 and M23A1. Operation and organizational MaintenanceMount M5, 60-mm Mortar Baseplate M1; 81-mm Mortars M1 and M4, M23A1, M23A2, andCompany Marksmanship, 81-mm Mortar (Tentative)(1938); 120 pages, 23 illus.Firing Cartridge, HE, M329A1. Cartridge, Smoke, WP, M328A1. Cartridge, Tactical. CS, XM630. Cartridge, Illuminating, M335A1. Cartridge, Illuminating, M335A2.Repair Parts and Special Tools List for Mortar, 4.2-inch:M30 (Cannon M30 on. Mount M24A1) and Trainer, Subcaliber, 60-mm: M31 (September 1984)(IncludingM30 (Cannon M30 on Mount M24A1) and Trainer, Subcaliber, 60-mm: M31 (OctoberM30 (Cannon M30 on Mount M24A1) and Training, Subcaliber, 60-mm: M31 (OctoberExamination for Gunners (1 MarchExamination for Gunners (1 JulyDrill, the Chemical Squad, PlatoonAmmunition for 3-inch. Trench Mortar, MK I (Stokes)(19 March 1928); 23 pages, 16 illus. Price 2.50Weapons Dept. U.S.Army Armor School; Ft. Knox, Ky; 128 pages, 77 illus. PriceList Go to Mortar Fact Sheet Subject List This website is designed to be browsed so you can discover If you order 1 item or 100 items in Contents.http://mail.emeigroup.com/upload/bosch-maxx-wfl-1200-user-manual.xml This chapter discusses assigned personnel duties, organization, operation, carriers, and ammunition. If the mortar section is to operate quickly and effectively in accomplishing its mission, mortar squad members must be proficient in individually assigned duties. Correctly applying and performing these duties enables the mortar section to perform as an effective fighting team. The platoon leader commands the platoon and supervises the training of the elements. He uses the chain of command to assist him in effecting his command supervising duties. Their firing positions and principal duties are as follows: In addition to supervising the emplacement, laying, and firing of the mortar, he supervises all other squad activities. He places firing data on the sight and lays the mortar for deflection and elevation. He and the assistant gunner make large deflection shifts by shifting the bridge assembly (or turntable when track mounted). In addition to loading, he assists the gunner in laying the mortar by cross-leveling the sight. He is responsible for swabbing the bore after each 10 rounds have been fired, or after each end of (fire) mission. He assists the gunner in shifting the bridge assembly (or turntable, if track mounted) when making large deflection changes, and shifts the mortar from low range to high range or vice versa when making large elevation changes. He also places out the aiming post. If necessary, he is also responsible (along with the squad leader) for the combat readiness of their mortar carrier. His imagination and ingenuity determine the value of this training; therefore, a prescribed sequence of training is not listed. The mortar section is drilled in all aspects of section training under the supervision of the section leader. He is responsible for the actions of the three mortar squads under his control. The duties of the section leader are as follows: During firing, its components absorb the forces of recoil as a unit.https://labroclub.ru/blog/3g3jv-manual-pdf The mortar can be hand carried for short distances when disassembled into five loads. This can be followed by a sustained rate of fire of 3 rounds per minute for prolonged periods. This rifling consists of 24 lands and 24 grooves of which the first 9 inches (22.86 centimeters), as measured from the base inside the barrel, are straight. The twist increases to the right from zero at this point to one turn in 84 inches (213 centimeters). The tube cap and firing pin are combined in a one-piece casting that screws onto the barrel. The trunnion pins on the cap fit into slots in the cap trunnion sockets in the bridge. These trunnion pins lock the cannon to the bridge assembly or socket assembly (track mounted) during firing. The coupling and sight mount assembly are held in position by two fully enclosed shock absorbers. The cannon is fastened to the standard assembly at this coupling. The sight socket and sight mount assembly are attached to this coupling. The M30 mortar cannon is the complete assembly consisting of the mortar tube, tube cap, firing pin, tube cap trunnion pins, coupling and sight mount assembly, sight socket, and shock absorbers. In order to facilitate understanding and increase learning, the term barrel is used throughout this chapter in all references pertaining to the mortar cannon (the complete cannon assembly). It is held to the bridge assembly by two trunnions that fit into sockets on the bridge spade or standard support assembly. The connection for the mortar locking pin assembly on the standard assembly is fastened to the coupling and sight mount assembly by the mortar locking pin assembly. Both the elevating and traversing screws are enclosed. An elevating screw housing assembly in the lower part of the standard assembly makes possible the two ranges of elevation. The desired high or low range is selected by using the elevating mechanism cam located just above the recoil mechanism on the standard assembly.http://atlantichurricane.com/images/4.0-bfa-onan-manual.pdf This assembly cannot be locked in any intermediate position. It is operated by turning the traversing crank on the left side of the mechanism. They are designed to ease the downward shock of firing and to return the mechanism to the prefiring position. It has a closed slot in the left side of the socket and an open slot in the right side. These slots receive the tube cap trunnions. Two bridge trunnions behind the socket fit into the bridge trunnion socket on the rotator. Two steel trunnion sockets to the rear of the spade hold the standard assembly. The bridge trunnion sockets are on the upper side of the rotator assembly. A projection on the underside fits into a recess in the baseplate assembly and contains the rotator slide lock. The rotator slide lock is actuated by the insertion of the bridge trunnions into their sockets, which depresses the expansion pin and securely locks the rotator and baseplate assemblies together. This projection also forms the pivot around which the rotator assembly rotates on the baseplate assembly. The baseplate assembly ( Figure 6-7 ) is about 38 inches (96.52 centimeters) in diameter. A recess in the center receives the bottom insert of the rotator assembly. The lower surface contains six ribs to increase the area in contact with the ground.The battalion heavy mortar platoon may be employed as a complete platoon of six mortar squads or it may be split and employed as two firing sections. He places the sight case and aiming posts to the left front of the mortar position. He then points to the exact spot where the mortar is to be mounted and indicates the initial direction of fire. He commands, ACTION. They place it in the position indicated by the squad leader. The assistant gunner positions the rotator assembly in the desired direction of fire. This also ensures that the bridge assembly is level with the baseplate assembly. The squad leader elevates the spade end of the bridge, thus allowing the trunnions to slide into place ( Figure 6-8 ). The squad leader places the spade end down on the sandbags or ammunition box and positions it so it is level in the horizontal plane. He places the standard base trunnions behind the standard base bearings, tilts the top of the standard forward, and pulls the standard toward himself. The standard base trunnions fall into the standard base trunnion sockets ( Figure 6-9 ). The assistant gunner raises the standard assembly to the vertical position, turns the traversing assembly slide 180 degrees, centers the traversing assembly slide, and elevates the elevating mechanism 15 turns. The squad leader inserts the left tube cap trunnion pin into its recess in the left side of the bridge socket ( Figure 6-10 ). The ammunition bearer than cants the barrel to the right, allowing the right tube cap trunnion pin to slide down an elongated slot to its socket, and places the barrel on the right shoulder of the assistant gunner. The assistant gunner lowers the barrel until it fits into position on the locking lug of the slide assembly. He inserts the mortar locking pin and turns it 180 degrees in either direction to lock the barrel to the standard assembly ( Figure 6-11 ). He removes the muzzle cover. He then ensures that the unit is properly seated in the sight socket to prevent errors or damage to the sight.The gunner checks the mortar at its maximum and minimum firing elevations. During firing, he swabs the bore after every 10 rounds fired or at the completion of each fire mission. If fuzes are loose, the ammunition bearer tightens them with the correct fuze wrench. The mortar is within two turns of center of traverse, and the vertical cross line of the sight is on the left edge of the aiming post. As soon as the deflection change is announced, the gunner places the announced deflection on the sightunit and traverses back onto the aiming post. The sight is cross-leveled by the assistant gunner. The gunner must shift the mortar between 200 and 300 mils inclusive and make an elevation change that causes him to elevate or depress the barrel. As soon as the deflection and elevation changes are announced, the gunner places the announced deflection on the sightunit. The assistant gunner unlocks the elevating mechanism cam and places the mortar in high or low range, whichever is appropriate. The assistant gunner picks up the spade end of the bridge. Looking through the sight, the gunner places his left hand on the assistant gunner's shoulder, pulling to the left or pushing to the right, until the vertical cross line is on or near the correct sight picture. The mortar should be within two turns of center of traverse when the exercise is completed. He places the firing data on the sight and, aided by the assistant gunner, lays the mortar. The ammunition bearer repeats the charge element when announced by the gunner and prepares the round with that charge. (If a fuze setting is announced, the ammunition bearer also repeats the setting and places it on the fuze.) He completes his preparation of the round to include the safety checks. The squad leader spot-checks the data on the sight and the lay of the mortar. He then commands, FIRE. The crew fires the mortar as follows: He continues to remove the sightunit until the baseplate assembly is settled and there is no danger of the sightunit becoming damaged from the recoil of the mortar. He holds the round with the palms of both hands up near each end of the round so that the fuze is pointing in the general direction of the mortar. The assistant gunner grasps the body of the round near the center and guides it into the barrel as far as the rotating band. The tail end (tail assembly, projectile base, and rubber obturator) of the cartridge is inserted into the muzzle. The assistant gunner rotates the cartridge clockwise until the pre-engraved band (M329A2 cartridge) engages the lands and grooves (rifling) in the barrel.He cuts both hands sharply away and down along the barrel. At the same time, he pivots to the left and bends toward the first ammunition bearer, extending his hands to receive the next round. The assistant gunner must not disturb the lay of the mortar as he loads the round (the round can bind when the base end enters the barrel). This can cause considerable dispersion in the target area and can create unsafe conditions because of erratic fire. If the round did not slide down the barrel and the projectile body can be grasped, the gunner removes the stuck round. The M329A2 is freed by rotating it in a clockwise direction. After waiting one minute, the gunner then returns to the mortar and tests the barrel for heat. When the barrel is cool enough to handle, the gunner signals for the rest of the crew to come forward. The barrel may be cooled with water or snow. If the barrel is not cool enough to handle, the gunner waits one minute to avoid an accident from a hangfire or the ignition cartridge and possible damage to the barrel from rapid quenching during cooling. If temperature is below 32 degrees, a solution of two quarts of water and two quarts of antifreeze is used. This prevents the primer from functioning. The round will not be refired. If only water is used, a 2-minute wait is allowed to let the water flow past the cartridge to the bottom of the barrel. If water and antifreeze is used, a 30-minute wait is allowed to let the water flow past the cartridge to the bottom of the barrel. All personnel except the gunner will take cover. If carrier-mounted, the ramp of the carrier is closed to protect the gunner. At no time will any part of the gunner's hands or body be placed in front of the muzzle of the barrel. The gunner and assistant gunner return the bridge assembly to its original position. The squad leader and ammunition bearer continue to raise the rear of the barrel. Explosive ordnance disposal personnel are notified. The barrel is then placed back into the firing position, and the ammunition bearer swabs it. The gunner pushes in, rotates, and disengages the mortar locking pin assembly, while supporting the standard assembly. The squad leader, assistant gunner, and ammunition bearer support the barrel, keeping it in the horizontal position. Keeping the barrel horizontal, they place it on the ground in the direction of fire, a safe distance from the mortar. Explosive ordnance disposal personnel are notified. Then, the squad follows these procedures: The gunner removes the sight, places an elevation of 800 mils and a deflection of 3800 mils on the M53 sightunit and places it in the case. The ammunition bearer removes the barrel from the assistant gunner's shoulder, then reinserts the mortar locking pin and cants the barrel to the left to disengage the trunnion pins. The squad grasps the base end of the barrel. Both mortarmen (squad leader and ammunition bearer) lift the barrel out of the socket. He then rotates the standard assembly away from the baseplate assembly and lifts up, disengaging the standard base trunnions. The squad leader disengages the bridge trunnions from the rotator assembly. The gunner and assistant gunner remove the baseplate and rotator assemblies (assembled). At the command MARCH ORDER, the squad places the mortar, equipment, and ammunition in the squad vehicle and trailer. It is an armored, full-tracked, self-propelled vehicle that can swim streams and small bodies of water. A caliber.50 machine gun is mounted on the cupola for the vehicle commander's use. The carrier provides limited armor protection for the squad during maneuver. In combat, the mortar is fired with the ramp closed and locked. During firing exercises in training, the mortar may be fired with the ramp open for visual inspection by safety personnel. The baseplate, bridge, and rotator assemblies of the ground mount are stowed outside the carrier. When a position is occupied, the mortars are emplaced 40 meters apart, making a section front (distance between flank mortars) of about 80 meters. The differences in the procedures from a ground-mounted mortar squad are also discussed herein. A mount tie-down strap is provided to tie the mortar (when it is depressed to its lowest elevation) and the standard base trunnion bearing support (when lowered to its lowest position) ( Figure 6-18 ). The trunnion detent pins at the base assembly are placed in their innermost position. The vehicular mount is locked in position by the turntable traverse lock. Securing the mortar for distant moves is required to prevent damage to the standard assembly recoil and counterrecoil mechanism, and possible injury to personnel. The mortar is provided with a sight extension arm assembly, which is received by the socket of the coupling and sight mount assembly. The gunner uses the sight extension arm to sight on his aiming point above the hull of vehicle. The sight extension must be removed before movement to prevent wear on the sight mount coupling gears. The vehicular mount supports the mortar and aids in securing the mortar for traveling. The mount consists of the components described in the following paragraphs. The standard assembly support located at the front of the mortar turntable retains the mortar barrel in the firing position. The lock consists of spring-loaded release levers, a catch, and a spring-loaded guard. The catch automatically latches when the mortar and standard assembly are raised to the firing position. To release the catch, raise the guard, step on the release, and lower the mortar barrel and standard assembly. The traverse locking handle, located in the center of the mortar turntable, locks the turntable to the indexing ring during mortar firing. To engage the lock, push the handle down until the latch automatically engages. To release the lock, raise the latch and pull up the locking handle. The socket assembly, located at the rear of the mortar turntable, receives and retains the barrel with detent pins--one on each side of the socket. The pins have two detent positions. To insert the barrel, the pins must be pulled to their outermost detent position. To retain the barrel, the pins are pushed to their innermost detent positions. The mortar tie-down strap is located on the mortar turntable. When not in use, the strap is stowed in the mortar equipment bag. The strap consists of a ratchet buckle with a hook on the lower and upper ends, with a D-ring attached in the center section. The strap is used to secure the mortar during travel. To install the strap, the ratchet end is hooked into the eye on the turntable, the upper end is wrapped around the barrel between the coupling and sight mount assembly, and the hook is fastened to the D-ring. The ratchet handle is operated up and down until the strap is tight. To loosen, the handle is opened all the way, the release latch is depressed, and the tie-down strap is pulled on. This clamp prevents the barrel from being accidentally depressed beyond safe limits ( Figure 6-19 ). Care and cleaning of the carrier-mounted mortar are the same as for the ground-mounted mortar. All maintenance records for the mortar and carrier are kept IAW the instructions outlined in TM 38-750-1. The purpose of this exercise is to get the mortar into a firing position to be reciprocally laid, or to engage a target using the direct lay method. The driver leaves the engine running. The intercom between the driver and squad leader is maintained so that the squad leader can direct the driver to move the carrier for the first deflection reading in reciprocal laying. To mount the mortar in the firing position, the squad leader gives the preparatory command PREPARE FOR ACTION, and the mortar squad takes the following actions. The assistant gunner moves the left mortar hatch cover chain and grasps the chain. The ammunition bearer picks up the sightunit case. When the squad is ready, the squad leader commands ACTION. The gunner then unlocks, folds, and locks the right hatch cover into its fully open position. The gunner places the sight extension on the mortar and adjusts it to his height. He then moves to the front of the mortar, places his right shoulder under the mortar, and pushes up until the standard support locks in the raised position. He then elevates the mortar about 15 turns. The gunner and assistant gunner cross-level the mortar and level it for elevation. The ammunition bearer ensures that the detent pins are in their innermost detent position. At this time, the crew should be at the firing post. The turntable must be properly adjusted and lubricated. The squad should know that the traversing turntable straps are used only when the turntable must be forced into position. The connection for the mortar locking pin assembly normally is within two turns of center after properly being laid. Two and one half turns may exist because of the 50-mil interval between the teeth of the turntable traversing ring. This procedure is the same as for the ground-mounted mortar with the following exceptions. He ensures that the mortar is within two turns of center of traverse. He then raises the handle to the unlocked position and assumes the following position: right foot on the standard support, left foot on the mortar tube socket assembly, right and left hands on the rim of the mortar hatch cover, and body braced on the fuze rack ( Figure 6-22 ). At the same time, he looks through the telescope of the M53- or M64-series sightunit ( Figure 6-22 ). At this time the assistant gunner pushes the turntable with his right foot; and the gunner pushes with his right foot and pulls with his right hand. Upon confirming this sight picture, he commands LOCK. This exercise is the same as large deflection shifts to the left with the following exceptions: His right foot is off the turntable and his left foot is on or near the standard support. After waiting, the driver mounts the carrier first and then the gunner second. The driver lowers the ramp. The gunner signals the crew to mount the carrier. If the mortar is not centered, the gunner and assistant gunner now center the mortar toward the rear of the carrier. The gunner removes the sight extension with the sightunit attached and places it on the carrier roof. The gunner and assistant gunner must support the barrel while it is being lowered. The gunner supports the barrel in front of the standard assembly. Then the squad leader and ammunition bearer carefully lift the base end of the barrel (without getting behind the barrel) and slowly raise it to the horizontal. While the cartridge moves slowly toward the muzzle, the squad leader and ammunition bearer continue to raise the rear of the barrel. The squad leader and ammunition bearer shake the barrel to remove any debris. The barrel is then placed back into the firing position and the ammunition bearer swabs the barrel. Explosive ordnance disposal personnel are notified. The gunner pushes in, rotates, and disengages the mortar locking pin assembly, while supporting the standard assembly. Explosive ordnance disposal personnel are notified. At the same time, the squad leader ensures that the detent pins are in their outermost detent positions. The driver and squad leader place the tube cap trunnion pins into the tube socket, aligning the tube cap trunnion pin. The assistant gunner aligns the standard base trunnion with the standard trunnion socket of the standard support, ensuring that the standard assembly is leaning toward the rear of the track when the trunnions are seated in the trunnion bearings. He then moves the standard assembly to the vertical position and supports the standard assembly. He then ensures that the connection for the mortar locking pin assembly is centered, and that the standard assembly is fully depressed. He then hooks the ratchet end of the tie-down strap to the eye on the turntable and wraps the upper end around the barrel between the coupling and sight mount. After fastening the hook to the D-ring, he operates the ratchet until the strap is tight. One mortarman always manipulates the bridge clamping assembly or baseplate locking clamp and, at the same time, aids in bracing these components. The rotator assembly is placed in its position on the right rear of the carrier. He joins the squad leader located at the base end of the mortar. He then moves to the front of the mortar to support the standard assembly. The assistant gunner leans the standard assembly forward and removes it. The driver pulls the detent pins to their outermost detent positions. The mortar is then mounted the same as in the previous paragraph. The preparatory command is PREPARE FOR MARCH ORDER; the command for execution is MARCH ORDER, upon which the crew proceeds as follows. Most checks can be made by visual inspection. The gunner, assistant gunner, and ammunition bearer are responsible for physically performing these safety checks under the squad leader's supervision. The squad leader supervises to ensure that all precautions are taken to prevent possible damage to equipment or injury to personnel. Using the sight, he then measures the elevation, refers the sight back to the aiming posts, and takes a correct sight picture. If the fuze is loose, he tightens it with the correct fuze wrench. If the carriers are not on level ground, the mortars may not be able to fire at certain elevations because of the longitudinal cant of the carrier. When the carrier is positioned, the gunner measures the minimum elevations that can be obtained on his mortar by elevating and depressing the mortar barrel and measuring with his sight. He gives the results of his measurements to the squad leader who in turn informs the FDC. The FDC then determines which constant elevation to fire and may direct the squad leader to move his carrier to a new position. When the carrier-mounted mortar is prepared for action, the squad members take their firing positions as follows: When the mortar is ground-mounted and prepared for action, the squad members take their firing posts. The driver remains with the carrier. The preparatory command is PREPARE TO DISMOUNT; the command of execution is DISMOUNT. A mounted squad drill should be practiced under section and squad control. The squad leader disconnects the breakaway plug and turns off the radio. The assistant gunner unlatches and opens the ramp door. Squad members move around the carrier using the fastest route available. The connection for the mortar locking pin assembly is centered or is within two turns of center. The mortars are centered on the rear of the carriers and the correct sight pictures are on the aiming point. At this time, the carrier engines are turned off. He then orients the aiming circle on the mounting azimuth. He swings the aiming circle telescope, by using upper motion, in the general direction of the mortar carriers and awaits the signal from the squad leader when ready to be laid for direction. The instrument operator reciprocally lays the mortar squad upon signal from the first squad leader (normally the base squad) ready to be laid for direction. All squad leaders note the alignment of the base squad and direct their drivers by intercom to pivot, aligning their respective carriers parallel to the base squad.