vorticey,
Delta-3 on a main rotor, such as the Robinson's, only pulls out a small percentage of the pitch that was input from the cyclic stick. I think that it is designed this way to make light helicopters easier to fly, just as the earlier Bells had counterweights and the Hiller had paddles. It may also help minimize the effect of gusts.
____________________
Lu,
The analogy of a 4-blade articulated rotor and the peace sign is an interesting one. The following assumes that the helicopter is flying up the page and azimuth-0 is at the back of the helicopter (bottom of the page).
If only the
Coriolis effect was considered then the blades would be at azimuths of 0, 93, 180 & 273-degrees. When drag is also considered, the fact that this drag is greater on the advancing blade then on the retreating blade is probably responsible for changing the 93-degrees to 87-degrees.
I now join you in bending over.
Kinky.
