How did tank guns get so deadly? | Evolution of Firepower

The Evolution of Tank Firepower

Introduction to Tank Firepower

• The episode focuses on the evolution of tank firepower from World War I to the present, emphasizing the main armament of tanks.

• It highlights how the role and requirements of tanks have changed over time, transitioning from infantry support to engaging enemy armor.

Origins of Tanks in World War I

• The first use of tanks occurred during the Battle of the Somme in 1916, aimed at breaking through trench warfare stalemates caused by machine guns and barbed wire.

• British heavy tanks were categorized into "males" (armed with cannons) and "females" (equipped with machine guns), each designed for different battlefield roles.

Armament Details

• Female tanks initially used Vickers, Lewis, and Hotchkiss machine guns, all capable of firing approximately 450 to 500 rounds per minute.

• Male tanks were armed with six-pounder guns (57mm), originally designed for naval use, which fired semi-armored piercing rounds effective against fortifications.

Tactical Performance in WWI

• Despite some limitations in accuracy at long ranges (effective range was about 200 yards), tanks demonstrated tactical success by supporting infantry operations.

• Notable successes included neutralizing German positions and significant advances during the last 100 days of WWI.

First Tank vs. Tank Engagement

• In April 1918, a British Mark IV male tank engaged a German A7V Panzer in one of the first recorded tank-on-tank battles.

• The Mark IV scored hits but had to stop for accurate firing; this highlighted a lack of training for gunners on moving targets.

Changes in Tank Warfare During WWII

Evolving Roles and Armaments

• By WWII, tanks needed to engage other armored vehicles effectively; anti-tank weapons evolved alongside thicker tank armor.

• Various designs emerged throughout WWII as nations adapted their strategies based on evolving battlefield conditions.

Early War British Tanks

• Early British tanks like Matilda II and Valentine were equipped with two-pounder guns that could penetrate up to two inches of armor at close range.

Challenges Against Advanced Armor

The Evolution of Tank Armament

The Littlejohn Adapter and Its Limitations

• The Littlejohn adapter is an extension to the barrel that utilizes a technique called Squeeze bore, which nearly doubles the velocity of rounds fired, enhancing armor penetration.

• Despite its effectiveness, the Littlejohn adapter was cumbersome and required specialized ammunition, leading to limited adoption.

Obsolescence of Early Tanks

• By 1942, the Matilda tank became obsolete due to its size and speed limitations; it could not be effectively upgraded.

• In contrast, the Valentine tank was successfully upgunned to carry both six-pounder and 17-pounder anti-tank guns.

Upgunning Tanks for Modern Warfare

• Throughout WWII, there was a significant need for tanks like the Sherman to support infantry with effective armaments such as the M3 75mm gun.

• The Sherman’s reliance on this gun became problematic against heavier German tanks like the Panther and Tiger later in the war.

Modifications for Enhanced Firepower

• To address firepower needs before D-Day, British forces modified Shermans by fitting them with a 17-pounder anti-tank gun despite significant challenges in turret redesign.

• This modification resulted in the Sherman Firefly, capable of penetrating up to 162mm of armor at distances up to 1000 meters.

Impact of Gun Design on Tank Development

• The Tiger tank's design was influenced by its powerful KwK 36 gun derived from successful anti-aircraft technology used earlier in WWII.

• The introduction of larger guns necessitated bigger tanks; thus, weapon capabilities directly impacted vehicle design.

Advancements in Gunnery Technology

• Improvements during WWII included increased gunnery ranges (up to over 1000 yards), faster turret traverse times (15–20 seconds), and enhanced gun stabilization techniques.

• These advancements allowed for more accurate firing at greater distances compared to WWI standards.

Innovations in Gun Mechanics

• Tanks began incorporating features like counterweights for easier elevation/depression of guns and muzzle brakes to mitigate recoil effects during firing.

The Evolution of Tank Technology

Early vs. Late War Tanks

• The contrast between early war tanks like the Matilda I and late war tanks such as the Comet illustrates the evolution of tank design and capabilities.

• By the end of World War II, a "universal tank" capable of fulfilling all combat roles had not yet been developed; instead, main battle tanks emerged to engage various targets.

Innovations in Tank Armament

• The Chieftain main battle tank introduced the L11 120mm gun, regarded as one of the best tank guns globally upon its introduction.

• The L11 gun can fire multiple types of ammunition including armor-piercing rounds (APFSDS), high explosive rounds, and smoke rounds.

Understanding APFSDS Rounds

• APFSDS stands for Armor-Piercing Fin-Stabilized Discarding Sabot; it features a dense core material like tungsten or depleted uranium encased in a sabot that falls away after firing.

• These rounds travel at speeds up to 1,800 meters per second, delivering catastrophic kinetic energy capable of penetrating tank armor and igniting vehicle interiors due to their pyrophoric nature.

Loading Mechanisms and Propellant Types

• Modern loading techniques involve separating the round from its propellant for flexibility; different bag charges are used depending on the type of round being fired.

• The thermal observation and gunnery site technology allows targeting enemy assets effectively at night or in poor visibility conditions.

Advancements in Gun Stabilization

• A fully stabilized gun system is crucial for accurate firing while both the target and firing tank are moving; this involves gyroscopes and servo motors.

• Modern tanks like Challenger 2 feature advanced barrel designs with thermal cladding to prevent warping from external factors during aiming.

Fume Extraction Systems

• Fume extractors prevent toxic fumes generated when firing from entering crew compartments by creating a vacuum that pulls fumes into a reservoir.

• Observing a tank firing reveals how fume extractors vent smoke after each shot, ensuring crew safety during operations.

Precision Alignment Technologies

• The Muzzle Reference System (MRS) ensures precise alignment between the gun and sights, allowing adjustments if misalignment occurs during use.

Tank Ammunition and Gun Technology

HESH Rounds and Their Impact

• HESH (High-Explosive Squash Head) rounds can be used against enemy armor, detonating upon impact to create a destructive blast that sends metal fragments into the vehicle's interior.

• The effectiveness of HESH requires it to be fired from a rifled gun, which is crucial for its operational success.

British Army's Unique Ordnance Choices

• The British Army continues to use rifled ordnance in its tanks, unlike other NATO countries that have transitioned to smoothbore guns.

• Rifling involves grooves cut into the barrel that cause the projectile to spin, enhancing accuracy and stability during flight.

Future Developments in Tank Armament

• The upcoming Challenger 3 tank is expected to feature a smoothbore gun, aligning the British Army with NATO standards by adopting modern artillery technology.

Evolution of Tank Gunnery Techniques