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Untitled
editThe equation for pitch need to be changed to 2*PI*rm/Zb, according to Fund. of TM by Peng (one of the ref materials).
2020-07-16: replaced "pitch" by "spacing". Pitch might lead to higher confusion, since pitch (pitch angle) is the angle between the 'plane of rotation' and the 'profile chord line'. GS — Preceding unsigned comment added by 188.22.2.28 (talk) 14:55, 16 July 2020 (UTC)