Battle for Arnhem.... (1 Viewer)
- Thread starter panda1gen
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panda1gen
Major
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Louis Badolato
Lieutenant General
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Kevin,
It's about time! You've been slacking off lately! lol
It's about time! You've been slacking off lately! lol
panda1gen
Major
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Was fed up with the moronic interjections - what is the point? No fun don't do it.
On your point, this guy is so tough he deserves a sombrero .....
panda1gen
Major
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But there is always the artillery ......
e.g. Polish 4.2 in mortar crew .....
Ref: From Wikipedia
The Ordnance ML 4.2-inch mortar was a heavy mortar used by the British Army during and after World War II.
The 4.2 in (110 mm) mortar was a smooth-bore weapon of the Stokes pattern and was designed by the Armaments Research and Development Establishment and produced by the Royal Ordnance Factories.[5]
It entered widespread British service in 1942, equipping chemical warfare companies of the Royal Engineers (RE). The Mark 3 became the standard model.
The first combat use was at Second Battle of El Alamein, when the 66th Mortar Company (RE) was attached to the Australian 24th Infantry Brigade.
During the battle, 66 Mortar Company provided intense, effective supporting fire on the 24th Brigade's exposed right flank, as the infantry advanced, expending all of the 4.2 in (110 mm) HE mortar ammunition in the theatre.
Around mid-1943, the Royal Engineer chemical warfare companies were disbanded as an emergency expedient and one heavy mortar company of each infantry division machine-gun battalion was equipped with the mortar.
This company was organized with sixteen 4.2 in (110 mm) mortars, in four platoons of four mortars each.
In early 1944, divisions in Italy also held a pool of mortars for issue to other units as needed, usually troops in the divisional anti-tank regiment, some regiments even converted one or more batteries to mortars.
Ordnance ML 4.2 in (110 mm) mortars were slower to reach Commonwealth forces in the Pacific and Asia. Australian Army units in the South West Pacific theatre were reportedly the first to receive them, before forces in Burma.[citation needed]
Description
The 4.2 in (110 mm) mortar entered production at the end of 1941 with a standard base plate and tripod. The normal detachment was six men and it was transported with ammunition in a 10 cwt (1,120 lb (510 kg)) trailer, usually towed behind a Loyd Carrier.
There was also an auxiliary base plate that fitted around it, to increase its area for use on softer ground. Later an integrated trailer/base plate was developed, called the Mk 1 Mobile Baseplate.
The wheels, which were on suspension arms, were unlocked and raised for firing; the Mk1/1 had detachable wheels and the barrel with tripod attached, was stowed on top for towing.
The mobile base plate trailer mounting could be brought into action by 2 men.[5] Regarding rate of fire, one source reports a crew putting 23 bombs in the air before the first impacted.[7]
Ammunition
Both HE (9.1 kg (20 lb)) and smoke (10.2 kg (22 lb)) ammunition was used. Smoke included WP and Base Ejection, and in World War II other types for practice.
Two charges were available. In World War II, both streamlined and cylindrical bombs were available.
Chemical munitions included the MK I chemical mortar bomb with Mustard gas (HS or HT fillings).
Users
World War II
e.g. Polish 4.2 in mortar crew .....
Ref: From Wikipedia
The Ordnance ML 4.2-inch mortar was a heavy mortar used by the British Army during and after World War II.
The 4.2 in (110 mm) mortar was a smooth-bore weapon of the Stokes pattern and was designed by the Armaments Research and Development Establishment and produced by the Royal Ordnance Factories.[5]
It entered widespread British service in 1942, equipping chemical warfare companies of the Royal Engineers (RE). The Mark 3 became the standard model.
The first combat use was at Second Battle of El Alamein, when the 66th Mortar Company (RE) was attached to the Australian 24th Infantry Brigade.
During the battle, 66 Mortar Company provided intense, effective supporting fire on the 24th Brigade's exposed right flank, as the infantry advanced, expending all of the 4.2 in (110 mm) HE mortar ammunition in the theatre.
Around mid-1943, the Royal Engineer chemical warfare companies were disbanded as an emergency expedient and one heavy mortar company of each infantry division machine-gun battalion was equipped with the mortar.
This company was organized with sixteen 4.2 in (110 mm) mortars, in four platoons of four mortars each.
In early 1944, divisions in Italy also held a pool of mortars for issue to other units as needed, usually troops in the divisional anti-tank regiment, some regiments even converted one or more batteries to mortars.
Ordnance ML 4.2 in (110 mm) mortars were slower to reach Commonwealth forces in the Pacific and Asia. Australian Army units in the South West Pacific theatre were reportedly the first to receive them, before forces in Burma.[citation needed]
Description
The 4.2 in (110 mm) mortar entered production at the end of 1941 with a standard base plate and tripod. The normal detachment was six men and it was transported with ammunition in a 10 cwt (1,120 lb (510 kg)) trailer, usually towed behind a Loyd Carrier.
There was also an auxiliary base plate that fitted around it, to increase its area for use on softer ground. Later an integrated trailer/base plate was developed, called the Mk 1 Mobile Baseplate.
The wheels, which were on suspension arms, were unlocked and raised for firing; the Mk1/1 had detachable wheels and the barrel with tripod attached, was stowed on top for towing.
The mobile base plate trailer mounting could be brought into action by 2 men.[5] Regarding rate of fire, one source reports a crew putting 23 bombs in the air before the first impacted.[7]
Ammunition
Both HE (9.1 kg (20 lb)) and smoke (10.2 kg (22 lb)) ammunition was used. Smoke included WP and Base Ejection, and in World War II other types for practice.
Two charges were available. In World War II, both streamlined and cylindrical bombs were available.
Chemical munitions included the MK I chemical mortar bomb with Mustard gas (HS or HT fillings).
Users
World War II
panda1gen
Major
- Joined
- Jul 29, 2005
- Messages
- 6,988
Louis, a response to your comment on the K&C thread about the PIAT.
Recommend ref: https://en.wikipedia.org/wiki/PIAT
The Projector, Infantry, Anti Tank (PIAT) Mk I was a British man-portable anti-tank weapon developed during the Second World War. The PIAT was designed in 1942 in response to the British Army's need for a more effective infantry anti-tank weapon and entered service in 1943.
The PIAT was based on the spigot mortar system, and projected (launched) a 2.5 pound (1.1 kg) shaped charge bomb using a cartridge in the tail of the projectile.[5]
It possessed an effective range of approximately 115 yards (105 m)[3] in a direct fire anti-tank role, and 350 yards (320 m)[3] in an indirect fire role.
The PIAT had several advantages over other infantry anti-tank weapons of the period: it had greatly increased penetration power over the previous anti-tank rifles, it had no back-blast which might reveal the position of the user or accidentally injure friendly soldiers around the user, and it was simple in construction.
However, the device also had some disadvantages: powerful recoil, a difficulty in cocking the weapon, and early problems with ammunition reliability.
Lieutenant Colonel Stewart Blacker was developing a platoon mortar. However, rather than using the conventional system of firing the mortar shell from a barrel fixed to a baseplate, Blacker wanted to use the spigot mortar system. Instead of a barrel, there was a steel rod known as a "spigot" fixed to a baseplate, and the bomb itself had a propellant charge inside its tail. When the mortar was to be fired, the bomb was pushed down onto the spigot, which exploded the propellant charge and blew the bomb into the air.[10]
By effectively putting the barrel on the inside of the weapon, the barrel diameter was no longer a limitation on the warhead size.[11]
Blacker eventually designed a lightweight mortar that he named the "Arbalest" and submitted it to the War Office,[12] but it was turned down in favour of a Spanish design.
Undeterred, however, Blacker continued with his experiments and decided to try to invent a hand-held anti-tank weapon based on the spigot design, but found that the spigot could not generate sufficient velocity needed to penetrate armour.
But he did not abandon the design, and eventually came up with the Blacker Bombard, a swivelling spigot-style system that could launch a 20-pound (9 kg) bomb approximately 100 yards (90 m). Although the bombs it fired could not actually penetrate armour, they could still severely damage tanks, and in 1940 a large number of Blacker Bombards were issued to the Home Guard as anti-tank weapons.[13]
When Blacker became aware of the existence of shaped charge ammunition, he realized that it was exactly the kind of ammunition he was looking for to develop a hand-held anti-tank weapon, as it depended upon the energy contained within itself, and not the sheer velocity at which it was fired.[14]
Blacker then developed a shaped charge bomb with a propellant charge in its tail, which fitted into a shoulder-fired launcher that consisted of a metal casing containing a large spring and a spigot; the bomb was placed into a trough at the front of the casing, and when the trigger was pulled the spigot rammed into the tail of the bomb and fired it out of the casing and up to approximately 140 metres (150 yd) away.
Blacker called the weapon the "Baby Bombard", and presented it to the War Office in 1941.[14] However, when the weapon was tested it proved to have a host of problems; a War Office report of June 1941 stated that the casing was flimsy and the spigot itself did not always fire when the trigger was pulled, and none of the bombs provided exploded upon contact with the target.[15]
At the time that he developed the Baby Bombard and sent it off the War Office, Blacker was working for a government department known as MD1, which was given the task of developing and delivering weapons for use by guerrilla and resistance groups in Occupied Europe.[1]
Shortly after the trial of the Baby Bombard, Blacker was posted to other duties, and left the anti-tank weapon in the hands of a colleague in the department, Major Millis Jefferis.[1]
Jefferis took the prototype Baby Bombard apart on the floor of his office in MD1 and rebuilt it, and then combined it with a shaped charge mortar bomb to create what he called the "Jefferis Shoulder Gun".
Jefferis then had a small number of prototype armour-piercing high-explosive anti-tank (HEAT) rounds made, and took the weapon to be tested at the Small Arms School at Bisley.[16]
A warrant officer took the Shoulder Gun down to a firing range, aimed it at an armoured target, and pulled the trigger; the Shoulder Gun pierced a hole in the target, but also wounded the warrant officer when a piece of metal from the exploding round flew back and hit him.[16]
Jefferis himself then took the place of the warrant officer and fired off several more rounds, all of which pierced the armoured target but without wounding him.
Impressed with the weapon, the Ordnance Board of the Small Arms School had the faults with the ammunition corrected, renamed the Shoulder Gun as the Projector, Infantry, Anti Tank, and ordered that it be issued to infantry units as a hand-held anti-tank weapon.[17]
Production of the PIAT began at the end of August 1942.[1]
Recommend ref: https://en.wikipedia.org/wiki/PIAT
The Projector, Infantry, Anti Tank (PIAT) Mk I was a British man-portable anti-tank weapon developed during the Second World War. The PIAT was designed in 1942 in response to the British Army's need for a more effective infantry anti-tank weapon and entered service in 1943.
The PIAT was based on the spigot mortar system, and projected (launched) a 2.5 pound (1.1 kg) shaped charge bomb using a cartridge in the tail of the projectile.[5]
It possessed an effective range of approximately 115 yards (105 m)[3] in a direct fire anti-tank role, and 350 yards (320 m)[3] in an indirect fire role.
The PIAT had several advantages over other infantry anti-tank weapons of the period: it had greatly increased penetration power over the previous anti-tank rifles, it had no back-blast which might reveal the position of the user or accidentally injure friendly soldiers around the user, and it was simple in construction.
However, the device also had some disadvantages: powerful recoil, a difficulty in cocking the weapon, and early problems with ammunition reliability.
Lieutenant Colonel Stewart Blacker was developing a platoon mortar. However, rather than using the conventional system of firing the mortar shell from a barrel fixed to a baseplate, Blacker wanted to use the spigot mortar system. Instead of a barrel, there was a steel rod known as a "spigot" fixed to a baseplate, and the bomb itself had a propellant charge inside its tail. When the mortar was to be fired, the bomb was pushed down onto the spigot, which exploded the propellant charge and blew the bomb into the air.[10]
By effectively putting the barrel on the inside of the weapon, the barrel diameter was no longer a limitation on the warhead size.[11]
Blacker eventually designed a lightweight mortar that he named the "Arbalest" and submitted it to the War Office,[12] but it was turned down in favour of a Spanish design.
Undeterred, however, Blacker continued with his experiments and decided to try to invent a hand-held anti-tank weapon based on the spigot design, but found that the spigot could not generate sufficient velocity needed to penetrate armour.
But he did not abandon the design, and eventually came up with the Blacker Bombard, a swivelling spigot-style system that could launch a 20-pound (9 kg) bomb approximately 100 yards (90 m). Although the bombs it fired could not actually penetrate armour, they could still severely damage tanks, and in 1940 a large number of Blacker Bombards were issued to the Home Guard as anti-tank weapons.[13]
When Blacker became aware of the existence of shaped charge ammunition, he realized that it was exactly the kind of ammunition he was looking for to develop a hand-held anti-tank weapon, as it depended upon the energy contained within itself, and not the sheer velocity at which it was fired.[14]
Blacker then developed a shaped charge bomb with a propellant charge in its tail, which fitted into a shoulder-fired launcher that consisted of a metal casing containing a large spring and a spigot; the bomb was placed into a trough at the front of the casing, and when the trigger was pulled the spigot rammed into the tail of the bomb and fired it out of the casing and up to approximately 140 metres (150 yd) away.
Blacker called the weapon the "Baby Bombard", and presented it to the War Office in 1941.[14] However, when the weapon was tested it proved to have a host of problems; a War Office report of June 1941 stated that the casing was flimsy and the spigot itself did not always fire when the trigger was pulled, and none of the bombs provided exploded upon contact with the target.[15]
At the time that he developed the Baby Bombard and sent it off the War Office, Blacker was working for a government department known as MD1, which was given the task of developing and delivering weapons for use by guerrilla and resistance groups in Occupied Europe.[1]
Shortly after the trial of the Baby Bombard, Blacker was posted to other duties, and left the anti-tank weapon in the hands of a colleague in the department, Major Millis Jefferis.[1]
Jefferis took the prototype Baby Bombard apart on the floor of his office in MD1 and rebuilt it, and then combined it with a shaped charge mortar bomb to create what he called the "Jefferis Shoulder Gun".
Jefferis then had a small number of prototype armour-piercing high-explosive anti-tank (HEAT) rounds made, and took the weapon to be tested at the Small Arms School at Bisley.[16]
A warrant officer took the Shoulder Gun down to a firing range, aimed it at an armoured target, and pulled the trigger; the Shoulder Gun pierced a hole in the target, but also wounded the warrant officer when a piece of metal from the exploding round flew back and hit him.[16]
Jefferis himself then took the place of the warrant officer and fired off several more rounds, all of which pierced the armoured target but without wounding him.
Impressed with the weapon, the Ordnance Board of the Small Arms School had the faults with the ammunition corrected, renamed the Shoulder Gun as the Projector, Infantry, Anti Tank, and ordered that it be issued to infantry units as a hand-held anti-tank weapon.[17]
Production of the PIAT began at the end of August 1942.[1]
panda1gen
Major
- Joined
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- Messages
- 6,988
Design
In firing, the pin moves forward into the round, the round is fired pushing the rod back against the spring and cocking it again.
The PIAT was 39 inches (0.99 m) long and weighed 32 pounds (15 kg), with an effective direct fire range of approximately 115 yards (105 m) and a maximum indirect fire range of 350 yards (320 m).[3]
It could be carried and operated by one man,[3] but was usually assigned to a two-man team,[21] the second man acting as an ammunition carrier and loader. The body of the PIAT launcher was a tube constructed out of thin sheets of steel, containing the spigot mechanism, trigger mechanism and firing spring.
At the front of the launcher was a small trough in which the bomb was placed, and the movable spigot ran along the axis of the launcher and into the trough.[8] Padding for the user's shoulder was fitted to the other end of the launcher, and rudimentary aperture sights were fitted on top for aiming; the bombs launched by the PIAT possessed hollow tubular tails, into which a small propellant cartridge was inserted, and shaped charge warheads.[8]
Conventional spigot mortar designs have a fixed spigot rod, for example the Blacker Bombard. The moving spigot rod in the PIAT design was unusual, and served to help reduce recoil sufficiently to make it a viable shoulder fired weapon.[3]
The PIAT was a little lighter by about 1 kg (2 lb 3 oz) and about 0.6 m (2.0 ft) shorter than its predecessor, the Boys anti-tank rifle, although it was heavier than the 18 lb (8.2 kg) bazooka.
To prepare the weapon for firing the spigot mechanism, which was operated by a large spring, had to be cocked, and to do this was a difficult and awkward process.
The user had to first place the PIAT on its butt, then step on both sides of the shoulder padding (a la Pogo stick) and quarter-turn the weapon to unlock the body and simultaneously lock the spigot rod to the butt; the user would then have to bend over and pull the body of the weapon upwards, thereby pulling the spring back until it attached to the trigger sear and cocking the weapon.
Once this was achieved, the body was then lowered and quarter-turned to reattach it to the rest of the weapon, and the PIAT could then be fired.[22]
Users of a small stature often found the cocking sequence challenging, as they did not have the sufficient height required to pull the body up far enough to cock the weapon; it was also difficult to do when lying in a prone position, as was often the case when using the weapon in action.[23]
Note, however, that troops were trained to cock the PIAT before expected use, and "in action the projector will always be carried cocked" (but unloaded).[3]
Unless a stoppage occurred, or the shooter did not maintain their hold as the weapon recoiled,[24] it would not normally be necessary to manually re-cock the weapon in action.
When the trigger was pulled, the spring pushed the spigot rod (which has a fixed firing pin on the end) forwards into the bomb, which aligned the bomb, ignited the propellant cartridge in the bomb and launched it along the rod and into the air.
The recoil caused by the detonation of the propellant blew the spigot rod backwards onto the spring, similar to that of a blowback operation; this reduced the shock of recoil and automatically cocked the weapon for subsequent shots, eliminating the need to manually re-cock.[8][22]
In firing, the pin moves forward into the round, the round is fired pushing the rod back against the spring and cocking it again.
The PIAT was 39 inches (0.99 m) long and weighed 32 pounds (15 kg), with an effective direct fire range of approximately 115 yards (105 m) and a maximum indirect fire range of 350 yards (320 m).[3]
It could be carried and operated by one man,[3] but was usually assigned to a two-man team,[21] the second man acting as an ammunition carrier and loader. The body of the PIAT launcher was a tube constructed out of thin sheets of steel, containing the spigot mechanism, trigger mechanism and firing spring.
At the front of the launcher was a small trough in which the bomb was placed, and the movable spigot ran along the axis of the launcher and into the trough.[8] Padding for the user's shoulder was fitted to the other end of the launcher, and rudimentary aperture sights were fitted on top for aiming; the bombs launched by the PIAT possessed hollow tubular tails, into which a small propellant cartridge was inserted, and shaped charge warheads.[8]
Conventional spigot mortar designs have a fixed spigot rod, for example the Blacker Bombard. The moving spigot rod in the PIAT design was unusual, and served to help reduce recoil sufficiently to make it a viable shoulder fired weapon.[3]
The PIAT was a little lighter by about 1 kg (2 lb 3 oz) and about 0.6 m (2.0 ft) shorter than its predecessor, the Boys anti-tank rifle, although it was heavier than the 18 lb (8.2 kg) bazooka.
To prepare the weapon for firing the spigot mechanism, which was operated by a large spring, had to be cocked, and to do this was a difficult and awkward process.
The user had to first place the PIAT on its butt, then step on both sides of the shoulder padding (a la Pogo stick) and quarter-turn the weapon to unlock the body and simultaneously lock the spigot rod to the butt; the user would then have to bend over and pull the body of the weapon upwards, thereby pulling the spring back until it attached to the trigger sear and cocking the weapon.
Once this was achieved, the body was then lowered and quarter-turned to reattach it to the rest of the weapon, and the PIAT could then be fired.[22]
Users of a small stature often found the cocking sequence challenging, as they did not have the sufficient height required to pull the body up far enough to cock the weapon; it was also difficult to do when lying in a prone position, as was often the case when using the weapon in action.[23]
Note, however, that troops were trained to cock the PIAT before expected use, and "in action the projector will always be carried cocked" (but unloaded).[3]
Unless a stoppage occurred, or the shooter did not maintain their hold as the weapon recoiled,[24] it would not normally be necessary to manually re-cock the weapon in action.
When the trigger was pulled, the spring pushed the spigot rod (which has a fixed firing pin on the end) forwards into the bomb, which aligned the bomb, ignited the propellant cartridge in the bomb and launched it along the rod and into the air.
The recoil caused by the detonation of the propellant blew the spigot rod backwards onto the spring, similar to that of a blowback operation; this reduced the shock of recoil and automatically cocked the weapon for subsequent shots, eliminating the need to manually re-cock.[8][22]
Louis Badolato
Lieutenant General
- Joined
- Apr 25, 2005
- Messages
- 17,883
Great description of the process of operating a PIAT. George MacDonald Frasier described laying on his back while cocking it, rather than standing (as you indicated, a la a pogo stick) which kept the operator from being exposed to enemy fire will cocking it. He also indicated that it often did not automatically recock itself when fired, so frequently had to be re-cocked manually.