Napalm is an incendiary mixture of a gelling agent and a volatile petrochemical. The name is a portmanteau of two of the constituents of the original thickening and gelling agents: coprecipitated aluminium salts of naphthenic acid and palmitic acid. Napalm B is the more modern version of napalm and, although distinctly different in its chemical composition, is often referred to simply as "napalm". A team led by chemist Louis Fieser originally developed napalm for the US Chemical Warfare Service in 1942 in a secret laboratory at Harvard University. Of immediate first interest was its viability as an incendiary device to be used in fire bombing campaigns during World War II; its potential to be coherently projected into a solid stream that would carry for distance resulted in widespread adoption in infantry flamethrowers as well.
A flamethrower is a ranged incendiary device designed to project a controllable jet of fire. First deployed by the Byzantine Empire in the 7th century AD, flamethrowers saw use in modern times during World War I, and more widely in World War II as a tactical weapon against fortifications.
Incendiary weapons, incendiary devices, incendiary munitions, or incendiary bombs are weapons designed to start fires or destroy sensitive equipment using fire, using materials such as napalm, thermite, magnesium powder, chlorine trifluoride, or white phosphorus. Though colloquially often known as bombs, they are not explosives but in fact are designed to slow the process of chemical reactions and use ignition rather than detonation to start or maintain the reaction. Napalm, for example, is petroleum especially thickened with certain chemicals into a 'gel' to slow, but not stop, combustion, releasing energy over a longer time than an explosive device. In the case of napalm, the gel adheres to surfaces and resists suppression.
A flame tank is a type of tank equipped with a flamethrower, most commonly used to supplement combined arms attacks against fortifications, confined spaces, or other obstacles. The type only reached significant use in the Second World War, during which the United States, Soviet Union, Germany, Italy, Japan, and the United Kingdom all produced flamethrower-equipped tanks.
The Mark 77 bomb (MK-77) is a United States 750-pound (340 kg) air-dropped incendiary bomb carrying 110 U.S. gallons of a fuel gel mix which is the direct successor to napalm.
Hobart's Funnies is the nickname given to a number of specialist armoured fighting vehicles derived from tanks operated during the Second World War by units of the 79th Armoured Division of the British Army or by specialists from the Royal Engineers.
The Type 93 and Type 100 flamethrowers were flamethrowers used by the Imperial Japanese Army and Imperial Japanese Navy's SNLF during the Second Sino-Japanese War and World War II.
The Flamethrower, Portable, No 2, also known as the Ack Pack, was a British design of flamethrower for infantry use in the Second World War.
A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties. Edible thickeners are commonly used to thicken sauces, soups, and puddings without altering their taste; thickeners are also used in paints, inks, explosives, and cosmetics.
The Lagonda company produced a number of flamethrowers during the Second World War.
The Churchill Crocodile was a British flame-throwing tank of late Second World War. It was a variant of the Tank, Infantry, Mk IV (A22) Churchill Mark VII, although the Churchill Mark IV was initially chosen to be the base vehicle.
Triethylaluminium is one of the simplest examples of an organoaluminium compound. Despite its name the compound has the formula Al2(C2H5)6 (abbreviated as Al2Et6 or TEA). This colorless liquid is pyrophoric. It is an industrially important compound, closely related to trimethylaluminium.
The M1 and M1A1 were portable flamethrowers developed by the United States during World War II. The M1 weighed 72 lb, had a range of 15 meters, and had a fuel tank capacity of five gallons. The improved M1A1 weighed less, at 65 lb, had a much longer range of 45 meters, had the same fuel tank capacity, and fired thickened fuel (napalm).
A flame fougasse is a type of mine or improvised explosive device which uses an explosive charge to project burning liquid onto a target. The flame fougasse was developed by the Petroleum Warfare Department in Britain as an anti-tank weapon during the invasion crisis of 1940. During that period, about 50,000 flame fougasse barrels were deployed in some 7,000 batteries, mostly in southern England and a little later at 2,000 sites in Scotland. Although never used in combat in Britain, the design saw action later in Greece.
The Petroleum Warfare Department (PWD) was a government department established in Britain in 1940 in response to the invasion crisis during World War II, when Germany apparently would invade the country. The department was initially tasked with developing the uses of petroleum as a weapon of war, and it oversaw the introduction of a wide range of flame warfare weapons. Later in the war, the department was instrumental in the creation of the Fog Investigation and Dispersal Operation that cleared runways of fog allowing the landing of aircraft returning from bombing raids over Germany in poor visibility, and Operation Pluto, which installed prefabricated fuel pipelines between England and France soon after the Allied invasion of Normandy in June 1944.
During WWII United States Naval Construction Battalions ("Seabees") modified/created all of the main armament flame throwing tanks that were used in the Pacific War: by USMC in the Battle of Saipan, Battle of Tinian, Battle of Iwo Jima, and by the U.S. Army in the Battle of Okinawa.
When WWII broke the United States had no mechanized flamethrowing capability. It is believed that an officer in the 754th U.S. Army tank battalion came up with the idea of mounting a flame thrower on a M3 Light tank on the island of New Caledonia. The Army used the idea on New Georgia and the Marines during the Battle of Bougainville. After which further development passed to the U.S. Army. Chemical Warfare Service at Schofield Barracks, Territory of Hawaii. There the Army reached out to the United States Naval Construction Force for assistance. The Seabees accepted the offer and converted or modified nearly 400 tanks for the Army. Those weapons set the standard for the U.S. through the Korean War. It was not until 1955 that a superior flame throwing tank replaced the Shermans the Seabees created.
OP-2 (ОП-2), or Ionov's salt, indicated on the package as Н. А., is a chemical substance used as a thickener. The main component of OP-2 gel is gasoline. On the cardboard or cardboard packaging of the OP-2, the inscription "H.A." refers to its unit component, aluminum naphthenate. Due to the same orders as the initials of its name, OP-2 was, for a long time, interpreted as being the opalm, a "hybrid" swiss thickener.
Geletrol is the trade name for a form of aluminium oleate, a chemical substance of chemical formula (C18H33O2)2AlOH and empirical formula (C18H33O2)1,7Al(OH)1,3. It is an amorphous solid derived from aluminum hydroxide and oleic acid, non-uniformly composed.
