QF 17 pdr Mk I-II

QF 17 pdr Mk I-II
Krajiny	Uk
Typ	Protitanková zbraňová vojna
Obdobie	ww2 (Ww2)
Tému	Album 23 Fotky zo zbrane QF 17 pdr Mk I-II

Fotogaléria QF 17 pdr Mk I-II, The Munícia Rýchlopalná 17-pounder (alebo len 17-pdr) bola 76,2 mm (3-palcová) zbraň vyvinutá Spojeným kráľovstvom počas druhej svetovej vojny. Používal sa ako protitanková pištoľ na vlastnom vozíku, ako aj na vybavenie niekoľkých britských tankov. Bola to najúčinnejšia spojenecká protitanková zbraň vojny. Použitý so strelou APDS bol schopný poraziť všetky okrem najhrubšieho brnenia na nemeckých tankoch. Bol použitý na "vylepšenie" niektorých zahraničných vozidiel v britských službách, najmä na výrobu variantu Sherman Firefly amerického tanku M4 Sherman, čo dávalo britským tankovým jednotkám schopnosť držať sa proti svojim nemeckým náprotivkom. V protitankovej úlohe ju po vojne nahradila 120 mm BAT bezzáklzová puška. Ako tankovú pištoľ ho vystriedal 84 mm 20 pounder.

Zdrojový: Wikipedia

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Pozri tiež:

The Most Formidable Anti-Tank Gun of the West

Komisia 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)
Úlohu	Anti-Tank Gun (Towed or Vehicle Mounted)
Kaliber	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 Sherman Firefly. 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 A 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.