page_title: No. 1 grenade
hierarchical_section_title: No. 1 grenade
caption_attribution_description: Diagram of British Hand Grenade No I Mark I. Body is made of solid drawn brass, cylindrical. Around the body is a cast-iron ring which is intended to break up on detonation of the charge. Bursting charge is 4 oz 2 drams Lyddite. The weight of the cast-iron ring causes the grenade to fall nose-first, which causes the needle in the cap to be driven into the detonator, which contains 30 grains Fulminate of Mercury, and ignite the Lyddite charge. The cap is set to position "Remove", "Travel" or "Fire". Handle is of cane approximately 16 inches long. To prepare the grenade&#160;: Turn cap to right until word "remove" is opposite arrow painted on body, and remove cap. Place detonator into recess Replace cap To throw the grenade&#160;: Unwind tail and allow to hang loose Turn cap from "travel" to "fire" position Remove safety pin Grasp grooved end of cane handle and throw grenade either over or underhand, taking care not to entangle the tail. Grenade should be thrown upwards at an angle of at least 35°. This facilitates the grenade striking the ground near vertically.
context_page_description: The grenade, hand No. 1 was the first British hand grenade used in World War I. It was designed in the Royal Laboratory, based on reports and samples of Japanese hand grenades during the Russo-Japanese War provided by General Sir Aylmer Haldane, who was a British observer of that war.
  The grenade proper is a container of explosive material with an iron fragmentation band. The fuse was of the impact sort, detonating when the top of the grenade hit the ground. A long cane handle allowed the user to throw the grenade further than the blast of the explosion.
  To ensure that the grenade hit the ground nose first, a cloth streamer was attached to the end of the handle. When thrown, this unfurled and acted as a tail to stabilize flight. The grenade came with a metal loop so it could hang from a belt.
context_section_description: The grenade, hand No. 1 was the first British hand grenade used in World War I.  It was designed in the Royal Laboratory, based on reports and samples of Japanese hand grenades during the Russo-Japanese War provided by General Sir Aylmer Haldane, who was a British observer of that war.
  The grenade proper is a container of explosive material with an iron fragmentation band. The fuse was of the impact sort, detonating when the top of the grenade hit the ground. A long cane handle (approximately 16 inches or 40 cm) allowed the user to throw the grenade further than the blast of the explosion.
  To ensure that the grenade hit the ground nose first, a cloth streamer was attached to the end of the handle. When thrown, this unfurled and acted as a tail to stabilize flight.  The grenade came with a metal loop so it could hang from a belt.
caption: Detailed diagram and cross section of the No. 1 grenade
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