PPRuNe Forums - View Single Post - Retreating Blade Stall No 2
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Old 23rd May 2012 | 16:27
  #100 (permalink)  
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From: EGDC
Baston - I think so...AnFI will surely disagree. A Valley crew had the same thing winching on Tryffan in 70 kt winds and strong updraughts, fortunately just before they put the winchman out of the door!

AnFI, just print the article and stop dancing around the issue. If you read his post, AC was talking about blade response to swashplate demand, not the blades reaction to aerodynamic forces cause by large differences in V squared between the advancing and retreating sides of the disc.

According to you (and I suspect Prof Leishman doesn't agree) selecting 10 degrees nose down from a still air hover will produce the same AoA on the retreating side (because it is all about swashplate demand and not flapping in your world) as having 10 degrees nose down to maintain (or to induce RBS exceed) VNE in the cruise. if your postulation is correct both scenarios will produce RBS when in fact only one of them does.
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