https://matteocampagna.com/en/registry/equipment/thinner-arrow-wind 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/equipment/thinner-arrow-windThe only measurement, made with machine-shot arrows, points the same way as the claim. In a wind tunnel five arrows drift in order of their diameters, from 9 mm for the thinnest to 18 for the thickest, and the thickest is also the heaviest; outdoors at seventy metres, in gusty wind, the thin arrow has a lateral spread of 44.6 mm against 58.6 for a thicker and slightly lighter one. Three models by the same author reach the same point, and in the fullest of them an X7 of almost 8 mm drifts more than an X10 of under 5 even though it weighs more. A Japanese calculation that seemed to say the opposite was in fact comparing a shot at 18 m with one at 70 m: in the same wind it gave the thin arrow two thirds of the sideways push. The limits are clear: a single direct test, by a single author, no archers, and diameter always changing along with mass. And a thin but very light shaft risks losing in mass what it gains in cross-section.claim:freccia-sottile-vento:revision:2026-10-05:2Mon, 05 Oct 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/thinner-arrow-wind#storiaA model of fifteen arrow combinations lines drift up with diameter: at seventy metres in a three metre per second wind a 4.92 mm X10 drifts about 25 cm and a 7.94 mm X7 44, even though it weighs more than thin arrows that drift less. The calculation confirms the direction; the measurement is still the 2011 one.claim:freccia-sottile-vento:history_entry:2026-09-04:2020Fri, 04 Sep 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/thinner-arrow-wind#storiaThe same author carries the result into shaft selection: for outdoor target archery the smallest possible outside diameter is best, but a stiffer carbon, giving shafts that are thinner and lighter at the same time, would hardly reduce drift. It is a model and adds no measurements, so the status stays.claim:freccia-sottile-vento:history_entry:2026-09-04:2013Fri, 04 Sep 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/thinner-arrow-wind#storiaThe first measurement arrives. In a wind tunnel five machine-shot arrows drift in order of their diameters, from 9 mm for the thinnest to 18 for the thickest, which is also the heaviest; outdoors at seventy metres, in gusty wind, the thin arrow has a lateral spread of 44.6 mm against 58.6, as the calculation predicts. It is a test on equipment, direct for this claim, but a single one by a single author: reported.claim:freccia-sottile-vento:history_entry:2026-09-04:2011Fri, 04 Sep 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/thinner-arrow-wind#storiaThe first model of arrow flight lists diameter among the drag factors, and a 10% change in it shifts range by about 4.5%. But the calculation concerns the distance reached in flight shooting, not sideways displacement in the wind, and there is still nothing on drift.claim:freccia-sottile-vento:history_entry:2026-09-04:1933Fri, 04 Sep 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/thinner-arrow-windclaim:freccia-sottile-vento:new_claim:2026-07-24:riportatoFri, 24 Jul 2026 08:00:00 GMT