QF 17 pdr Mk I-II

QF 17 pdr Mk I-II
Paese	Regno unito
digitare	Guerra delle armi anticarro
Periodo	ww2
Argomento	Album di 23 foto di una pistola QF 17 pdr Mk I-II

Galleria fotografica di un QF 17 pdr Mk I-II, The Ordnance Quick-Firing 17 libbre (o solo 17-pdr) era un cannone da 76,2 mm sviluppato dal Regno Unito durante la seconda guerra mondiale. È stato usato come cannone anticarro sulla propria carrozza, oltre a equipaggiare un certo numero di carri armati britannici. Era il cannone anticarro alleato più efficace della guerra. Utilizzato con il colpo APDS era in grado di sconfiggere tutte le armature tranne la più spessa sui carri armati tedeschi. È stato usato per "up-gun" alcuni veicoli costruiti all'estero nel servizio britannico, in particolare per produrre la variante Sherman Firefly del carro armato statunitense M4 Sherman, dando alle unità di carri armati britanniche la possibilità di tenere la propria contro le loro controparti tedesche. Nel ruolo anticarro fu sostituito dal fucile senza rinculo BAT da 120 mm dopo la guerra. Come cannone a serbatoio gli successe l'84 mm 20 libbre.

fonte: Wikipedia

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The Most Formidable Anti-Tank Gun of the West

Le Ordnance QF 17-pounder was arguably the finest Allied anti-tank gun of World War II. Developed in 1941 to counter the increasing thickness of German armor, it surpassed the earlier 2-pdr and 6-pdr guns in every metric. While the Mk I was the standard towed version on a split-trail carriage, the Mk II (and subsequent Marks) were optimized for use in tanks and tank destroyers. It was the only Allied gun capable of consistently knocking out a Tiger or Panther at combat ranges, making it the most feared weapon in the British arsenal.

Attribute	Technical Specification (17-pdr Mk I)
Ruolo	Anti-Tank Gun (Towed or Vehicle Mounted)
calibro	76.2 mm (3 inches)
Barrel Length	55 calibers (approx. 4.2 meters)
Rate of Fire	10 rounds per minute
Max Range (HE)	~9,600 meters (10,500 yards)
Armor Penetration	~130mm (APCBC) to ~230mm (APDS) at 1000m
Weight (Towed)	2,100 kg (4,600 lbs)
Carriage	Split-trail (Mk I) / Vehicle mounting (Mk II)

Design Engineering: High Velocity and Sub-Caliber Power

The Muzzle Brake: Due to the massive propellant charge required to fire such a heavy shell at high speeds, the 17-pdr produced a violent recoil. A large, double-baffle muzzle brake was essential to dissipate the gases and prevent the gun from leaping off the ground.
APDS (Sabot) Technology: The 17-pdr pioneered the use of Armor-Piercing Discarding Sabot (APDS) ammunition. By firing a smaller tungsten core inside a lightweight sleeve that fell away after leaving the barrel, the projectile achieved incredible velocities (over 1,200 m/s), allowing it to punch through the front of a Tiger II.
The “Pheasant” Expedient: When the 17-pdr barrels were ready before their proper carriages were, the British mounted them on 25-pounder howitzer carriages. These hybrid guns, known as “Pheasants,” were rushed to North Africa just in time to surprise German Tiger tanks at Medenine.
Mk II Integration: To fit this massive gun into a tank turret (like the Sherman Firefly), the recoil system had to be completely redesigned. The Mk II variant featured a shorter recoil stroke and turned the gun 90 degrees on its side to allow the loader to access the breech more easily in cramped conditions.

Operational History: Breaking the Panzers

The Firefly Legend: Perhaps the most famous use of the 17-pdr was in the Lucciola sherman. This gave British and Commonwealth armored units a tank that could finally kill German heavies from the front, forcing German tank commanders to target the “long-barreled Shermans” first.
Northwest Europe: From D-Day to V-E Day, the 17-pdr was the primary “door kicker.” Whether towed by a Crusader tractor or mounted on the Achilles e Archer tank destroyers, it provided the lethal reach needed to halt German counter-attacks.
Massive Signature: The downside of its power was the muzzle blast. Firing the 17-pdr kicked up so much dust and debris that it instantly gave away the gun’s position and often blinded the crew for several seconds after the shot.
Post-War Service: The 17-pdr was so effective it remained in service long after the war, seeing action in the Korean War and serving as the primary armament for the early Israeli tank corps.