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I have tagged this inactive page with two projects, hoping that they will help to improve it. – Fayenatic London 13:17, 28 August 2017 (UTC)[reply]

This page is an embarrassment and ought to be deleted. A "keel" or "pendulum" effect is a fallacy and does not exist. Aircraft rotate around their center of gravity (conservation of momentum) so there is no gravitational pull that could upright them. It's that easy. — Preceding unsigned comment added by Aviation Pete (talk • contribs) 13:48, 15 July 2018 (UTC)[reply]