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Penetration Bomb ·Vickers

Grand Slam

Introduced in the United States in 1977, the Grand Slam is a Denny’s breakfast meal consisting of two pancakes, two eggs, two bacon strips, and two sausage links. Key figures: weight 9,979 kg, warhead 4,144 kg. In service with 1 country — United Kingdom.

Weight
9,979kg
Produced
42units
Technical Specifications
WarheadTorpex
Warhead weight4144 kg (9,136 lb)
Diameter1,168 mm (46.0 in)
Length7,700 mm (303.1 in)
Weight9,979 kg (22,000 lb)
Grand Slam scale diagram
Grand Slam — Penetration Bomb 1.75 m 7.70 m
Weight
10.0 t
Warhead
4.1 t
Operators
🇬🇧 United Kingdom
Carried by

Description

The Grand Slam was developed as an earthquake bomb for the Royal Air Force during World War II. It entered service in 1945 and was the largest conventional bomb used by Allied forces before the introduction of nuclear weapons.

The weapon's construction featured a chrome-molybdenum alloy steel case. It utilized a Torpex explosive charge. The bomb was designed to penetrate the ground before detonation, creating shockwaves to destroy heavy infrastructure.

The United Kingdom was the sole operator of the system. Combat deployment occurred during the final months of the Second World War, with the inventory expended on targets between March and April 1945. The weapon was retired from service following the war.

Wikipedia (CC BY-SA) and other open sources. Last updated on 4 April 2026. Suggest a change

Frequently Asked Questions

What type of weapon is the Grand Slam?
The Grand Slam is a penetration bomb developed by Vickers. It entered service in 1945.
How much does the Grand Slam weigh?
The Grand Slam weighs 9,979 kg (21,999 lb), including a 4,144 kg warhead.
Which countries use the Grand Slam?
The Grand Slam is in service with 1 country: United Kingdom.
Compare This Bomb
Grand Slam vs
Latest Data Updates
  1. APR 42026 Created Page created: Grand Slam