I put @dougselsam’ discussed flagged message.
This message refers in several comments on the topic of which yours on Tip Speed Ratio - #6 by Windy_Skies.
@dougselsam’ message replies in a general way (wind energy) to a specific concern (TSR). For that I think his message is on-topic. The same applies to my answer as it underlines the wind energy aspect as Doug’s given reply to the TSR concern.