I think you missed the fact that I asked Kevin to explain his use of the words "Radius of Gyration".

I, of course, suggested that what he was trying to describe is actually the Moment of Enertia.

I'm personally totally unfamiliar with the "radius of gyration" definition. This could be me but then again dynamics of bodies is something that I've been tested on many years when at the university and often in the English language as a well.

Even if the "adius of gyration" exists as a definition than Kevins use of it is awkward. The second point conveyed in my post. Mostly because "pitching moment" is a force on a lever while Moment of enertia (Radius of gyration ?) is not.

And a few other things.

Regards,

Wouter