https://matteocampagna.com/en/registry/equipment/compound-nocking-point-path 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/compound-nocking-point-pathThe mechanics are there and carefully worked out, but they come from a single author and from models checked on a handful of bows. One formula, valid for compound, recurve and longbow alike, says that with the nock set above the geometric centre of the string, as it nearly always is, the nocking point rises throughout the draw, and rises more the further it sits from that centre. On a single-cam compound the uncorrected path would stray 21.8 mm from the straight line; with the cam tracks corrected by the manufacturer the measured path stays within 1.5 mm, the best of the many bows the author says he measured. As early as 2009, presenting a dynamic model, the same author had measured a path within a millimetre of a straight line on another single cam bow. Geometry decides: a longer bow axle to axle strays less, the unbraced limb angle matters little, and only single and hybrid cams have the degrees of freedom to straighten the path, while twin and binary cams do not. A second paper by the same author adds that it is the nocking-point path, more than string force or the rest spring, that governs how the arrow behaves, and an independent model from 2012 finds a transverse component of about 9 per cent in the force at full draw. The registry counts this work as modelling, because the measurements on bows serve to check the calculation rather than standing as a test of their own; and nobody has yet looked at the target, meaning a group or a score comparing a corrected bow with an uncorrected one.claim:incocco-percorso-compound:revision:2026-04-04:3Sat, 04 Apr 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/compound-nocking-point-pathclaim:incocco-percorso-compound:new_claim:2026-02-11:trasferitoWed, 11 Feb 2026 08:00:00 GMT