Hardest ATPL questions Explained: Dutch Roll explained

Introducing Chris! With over 30 years of flying under his belt and nearly 8000 flying hours, Chris is a former Army Air Corps A2 Qualified Helicopter Instructor. Specialising in various syllabuses, he's taught ground schools covering all exam topics since 2013. Today, he's diving into the world of Dutch roll. Keep an eye out for more expert insights!

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[JMWflicks]

It's a better answer than most that I've seen on YT, but one significant problem. When you talk of roll stability, you appear to conflate it with bank angle stability. Roll stability is conferred by roll rate damping. If roll moment due to aileron ( or differential spoilers in transport aircraft at low speed) is removed, roll damping (due to roll moment on the wings) rapidly brings roll rate to a stop. But it is indifferent to bank angle. It is the spiral root that either slowly brings the wings back to level flight if negative, or tips the aircraft further over if positive. (I was a flight dynamicist at Hawkers, later BAe, from 1972 to 2010).

[NebuchadnezzarThend]

loved it granpa :D although i have my atpl by now, i enjoyed every minute of it! cheers! (as you would say)