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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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Friction_primer entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-06-25 and was most recently seen on 2026-06-25.
A friction primer is a device to initiate the firing of muzzle-loading cannon. Each friction primer consists of a copper tube filled with gunpowder. The tube fits into the cannon touch hole burying its lower end in the gunpowder chamber. The top end of the tube extending above the touch hole has a short perpendicular spur tube filled with a priming mixture of antimony sulfide and potassium chlorate. A roughened wire slider extends from the outer end of the spur tube through the priming mixture and the gunpowder tube. This slider wire is twisted into a loop on the opposite side of the gunpowder tube.
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