Lu,
"If you move the cyclic forward from a hover (assuming zero wind) the greater lift will be on the retreating side. This will generate a perturbing force on the two rotors causing them to move as a gyroscopic rotor 90-degrees later in rotation, which will cause the nose to fall and the tail to rise because of the 100% interlock between the rotors and the fuselage. At least I think that is what will happen."
I believe that you previously accepted the fact that an teetering rotor has a precession of 90-degrees and that a rotor with some rigidity (flapping hinge offset) has a precession of
less than 90-degrees. If you increase this rigidity all the way to 'absolute' rigidity you will reduced the precession all the way to 0-degrees.
For further information on this, see my paragraph to CRAN a few postings back and his subsequent agreement.
__________
Here's a little mental analogy, for the fun of it. Take a toy gyroscope and with its axle vertical and 'weld' the axle to the top of a can of beer.
If you try to roll this assembly to the right when the gyro is not rotating, the assembly will roll to the right.
Now drink all the beer so that the can is very light and spin the gyro up to a zilloin rpm CCW. If you now try to roll this assembly to the right, the assembly will roll forward. [Gyroscopic precession]
Now **** the beer back into the can, file most of the mass off of the gyro and only spin it at 60 rpm.
If you try to roll this assembly to the right which way will it go
?
This is the analogy with the Unicopter. The full can of beer is the heavy fuselage, the filed down gyro is the light rotor(s) and the 60 rpm is the slow rotor rotation.
If you don't buy this, I'm having a beer.
