The Ranken Dart was an anti-

Zeppelin A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, pp ...

weapon developed during the

First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

. It was an air-dropped explosive

flechette A flechette ( ) is a pointed steel projectile with a vaned tail for stable flight. The name comes from French , "little arrow" or "dart", and sometimes retains the acute accent in English: fléchette. They have been used as ballistic weapons sinc ...

-type of missile-shaped bomb which was long and wide while being of a steel and wood construcation. It was developed for use against German Zeppelin airships by Engineer Lieutenant Commander Francis Ranken, initially as a

Royal Naval Air Service The Royal Naval Air Service (RNAS) was the air arm of the Royal Navy, under the direction of the Admiralty's Air Department, and existed formally from 1 July 1914 to 1 April 1918, when it was merged with the British Army's Royal Flying Corps t ...

weapon but was also adopted by the

Royal Flying Corps "Through Adversity to the Stars" , colors = , colours_label = , march = , mascot = , anniversaries = , decorations ...

in 1916. Usually carried in packs of 24; the darts could be dropped individually or all at once. Aircraft equipped with Ranken darts had to climb above their targets, before dropping them. It entered service in . Ranken Darts became obsolete with the advent of the combination of explosive

Pomeroy bullet The Pomeroy bullet was designed by New Zealander John Pomeroy (1873–1950) as an anti-zeppelin weapon. Pomeroy bullets were supposed to explode when encountering the minimal resistance of fabric envelopes containing hydrogen gas holding the zeppe ...

s and

incendiary ammunition Incendiary ammunition is a type of ammunition that contains a chemical that, upon hitting a hard obstacle, has the characteristic of causing fire/setting flammable materials in the vincinity of the impact on fire. World War I The first time ince ...

fired from

.303 .303 may refer to: * .303 British, a rifle cartridge * .303 Savage, a rifle cartridge * Lee–Enfield The Lee–Enfield or Enfield is a bolt-action, magazine-fed repeating rifle that served as the main firearm of the military forces of the B ...

Vickers Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public in 18 ...

and Lewis guns mounted on fighter aircraft.

Design

The Ranken dart consisted of a tinplate tube 23cm long, with a cast iron pointed nose at one end, and a plug and three spring loaded arms at the other. The arms were kept closed in storage by means of a cap, either tin or rubber, which acted as a buffer when the dart was in its dropping tube. When released, the arms opened up and locked in place to act as a grapnel, thus ensuring that the body entered the fabric. The Dart contained high explosive, black powder and phosphorus which were ignited when the head penetrated the airship's outer skin.

References

External links

Sectioned Ranken Dart in the Imperial War Museum collection
Aerial bombs of the United Kingdom Incendiary weapons World War I weapons of the United Kingdom Anti-aircraft weapons {{Weapon-stub

Design

References

Further reading

External links