Thank heaven for Crab. The myth that the Tail Rotor's position relative to the Main Rotor Head is a factor in the hover attitude has somehow evolved, much to the surprise of those who actually build these things.
For the record:
the tail rotor makes the left wheel hang low in a hover, due to the sum of two competing factors:
1) the translating tendency (TR thrust tries to move the helo to the right, it takes left bank to stop it)
2)TR thrust acts to rotate the fuselage, depending on how far above or below the tail rotor is relative to the CG. The higher the tail rotor, the flatter the hover attitude, because the TR roll component cancels the translating tendency roll attitude. the lower the TR, the less cancellation, the more pronounced the roll. (this factor probably lead the aerodynamically challenged to deduce the "theory of rotor heights" explanation.
