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Thread: Tail Rotor vs Twin Rotor (ie Chinook)
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Old 9th Nov 2018, 14:55
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Tailspin Turtle
 
Join Date: Mar 2009
Location: Connecticut
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Originally Posted by JohnDixson
CG Range: Single vs Tandem Rotor

A popular myth which has survived for years in spite of facts to the contrary. One example I was able to access online just now:

CH-47D Manual.
Max Weight: 50,000 lbs
CG Range at 50,000 lbs: 322-331 inches= 9 inches

MH-53E Natops
Max Weight: 70,000 lbs
CG Range at 70,000 lbs: 343.9-365.0 inches= 21.1 inches
Very interesting, John, and counter intuitive. All that from the canted tail rotor? Some from the height of the rotor head above the cg? Some peculiarity of the CH-47 control mixing? I've toyed with writing a paper on the Piasecki HRP development and want to be sure I don't believe something silly.
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