Military Grenades and Throwing Principles

Vocabulary flashcards covering specifications, components, firing mechanisms, and throwing techniques for the Arges Grenade and Gren No 80 (WP) A based on the lecture notes.

Arges Grenade Total Weight

The total weight of the Arges grenade, specified as $485\,\text{gms} \pm 30\,\text{gms}$.

Arges Grenade Maximum Diameter

The maximum diameter of the Arges grenade body, measuring $60 \pm 1\,\text{mm}$.

Arges Grenade Total Length

The overall length of the Arges grenade, which is $115\,\text{mm} \times 2\,\text{mm}$.

Arges Grenade Main Filling

The explosive filling of the Arges grenade, consisting of $65\,\text{gm} \pm 5\,\text{gm}$ of plasticized PETN.

Arges Grenade Effective Lethal Radius

The effective lethal radius produced by the high explosive filling, which is $15\,\text{ms}$.

Arges Grenade Detonator Assembly Length

The specified length of the detonator assembly in the Arges grenade, which is $70.5\,\text{mm}$.

Arges Grenade Core Steel Balls

The core of the grenade containing $3500$ steel balls (also noted as $8800$) set in plastic with a diameter of $2.5\text{ to }3\,\text{mm}$, which spread outward at a speed of about $1800\,\text{ms/sec}$.

Arges Grenade Body Construction

An oval-shaped plastic body with an inner core made of polystyrene fabricated in two glued parts, and an outer body fabricated from polyethylene molded onto the core with an externally threaded neck.

Arges Grenade Firing Mechanism Components

A mechanism comprising seven components: striker, cocking spring, spring bolt, safety lever, safety pin, plastic body, and ring safety pin.

Arges Grenade Delay Tube Mixture Composition

The pyrotechnic delay mixture contained in the delay tube, consisting of approximately $60\%$ Barium chromate, $14\%$ Pot per chlorate, and $26\%$ Nickel Zirconium.

Arges Grenade Detonator Assembly Delay

The operational delay range provided by the detonator assembly, which is $3.5\,\text{secs}$ to $5\,\text{secs}$.

Gren No 80 (WP) A Description

A grenade weighing $568\,\text{gms}$ with a tinned plate body filled with white phosphorus and a top holder consisting of a striker, spring, striker lever, and safety pin.

Gren No 80 (WP) A Recognition Markings

Distinct markings indicating white phosphorus content, including a $12.5\,\text{mm}$ white band about $50\,\text{mm}$ from the shoulder, the letters 'WP' in $9.5\,\text{mm}$ high black letters, or 'WP' in $19\,\text{mm}$ high white letters on opposite sides of the body.

Gren No 80 (WP) A Igniter Set

An igniter assembly consisting of a $0.22\text{-inch}$ cap, cap chamber, a short length of safety fuze burning between $2.5\text{ to }4\,\text{sec}$, and a detonator.

Gren No 80 (WP) A Striker Action

The mechanism action where pulling the safety pin releases the striker lever upon throwing, causing the spring-driven striker to swing like a mousetrap wire, strike the igniter cap, ignite the fuze, and trigger the detonator to burst the body.

The Ready Position (Grenade Handling)

The stance where the grenade is held in the right hand with an overhand grip above the waist, lever uppermost, left hand finger through the safety pin ring, and body turned to the right so the left shoulder and foot face the target.

Principles of Grenade Throwing

Four core principles: throwing at a high angle, keeping the left hand in line to the target and vice versa, watching the fall of the grenade, and placing left-handed throwers on the right side of the line.

Common Grenade Throwing Faults

Errors during throwing, including loss of distance caused by releasing the grenade before or after reaching the highest point above the shoulder, and the grenade falling wide due to shoulders not being kept aligned with the target.