Ukrainian drones now spray 2,500° C thermite streams right into Russian trenches


Wars of necessity spawn weapons innovation as each side tries to counter the other’s tactics and punch through defenses. For instance—as the Russian invasion of Ukraine has made drone warfare real, both sides have developed ways to bring down drones more easily. One recent Ukrainian innovation has been building counter-drone ramming drones that literally knock Russian drones from the sky.

In the case of the trench warfare that currently dominates the Russian invasion of eastern Ukraine, the Ukrainians have another new tactic: dragon’s fire. Delivered by drone.

Videos have begun to circulate on Telegram and X this week from Ukrainian units showing their new weapon. (You can see three of them below.) The videos each show a drone moving deliberately along a trench line as it releases a continuous stream of incendiary material, which often starts fires on the ground below (and ignites nearby ammunition).

This drone type is allegedly called “Dragon” and is said to feature thermite, a mixture of metal powder (usually aluminum) and metal oxide (in this case, said to be iron). When a thermite mixture is ignited, it undergoes a redox reaction that releases an enormous amount of heat energy and can burn anywhere. It can get really, really hot.

Wikipedia offers a nice description of the advantages of thermite:

The products emerge as liquids due to the high temperatures reached (up to 2,500° C [4,532° F] with iron(III) oxide)—although the actual temperature reached depends on how quickly heat can escape to the surrounding environment. Thermite contains its own supply of oxygen and does not require any external source of air. Consequently, it cannot be smothered, and may ignite in any environment given sufficient initial heat. It burns well while wet, and cannot be easily extinguished with water—though enough water to remove sufficient heat may stop the reaction.

Whether such weapons make any difference on the battlefield remains unclear, but the devices are a reminder of how much industrial and chemical engineering talent in Ukraine is currently being directed into new methods of destruction.





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