https://matteocampagna.com/en/registry/technique/release-to-arrow-separation-time Changes to this claim in Matteo Campagna's evidence registry: its status, its year-by-year history, revisions of the page. en-gb https://matteocampagna.com/en/registry/technique/release-to-arrow-separation-timeThe most precise measurement is a single one, and it is clear. In 2011, at the London Olympic test event, a camera running at 4,000 frames per second filmed sixteen world-class recurve archers at 70 m: the string stays on the fingers for 1.9 thousandths of a second on average, the nock reaches its point closest to the body at 5.4, the arrow straightens again at 8.6 and leaves the string at 14.6, with standard deviations between 0.4 and 1.3 thousandths; between men and women, with draw weights from 146 to 227 newtons and arrows from 660 to 775 millimetres, the differences stay below one and a half thousandths. Two models of the bow calculate similar times, 16.1 thousandths for a longbow in 1981 and 17.5 for a compound in 2009, where photographs on the same bow put the separation between 17.0 and 17.25. The oldest measurement on an archer, however, gives twice as much: in 1987 an Italian national-team archer, with an accelerometer on the bow, took thirty thousandths from the start of the limbs' return to separation, with a time zero taken from the clicker and the string used as switches, and in 1994 another Italian group writes the same figure, three frames at a hundred per second, without measuring it. The two measurements may not start from the same instant, and the difference may lie entirely in the definition: until someone compares them on the same shots the precise figure remains contested, while the order of magnitude, the hundredth of a second, is the same for everyone. By contrast, the time between the clicker dropping and the shot, measured in seven German national-squad archers, runs from 144 to 176 thousandths, ten times as long.claim:rilascio-pochi-millisecondi:revision:2026-03-04:3Wed, 04 Mar 2026 08:00:00 GMT https://matteocampagna.com/en/registry/technique/release-to-arrow-separation-timeclaim:rilascio-pochi-millisecondi:new_claim:2026-01-29:contestatoThu, 29 Jan 2026 08:00:00 GMT