Hi Andy, Andy Ross schrieb: > > Maik Justus wrote: > > By the way: With this changes the heli is not anylonger parallel to > > ground (while hovering). It is tiltet to the left to compensate the > > tail rotor force. > > That sounds wrong to me. The *rotor* should be tilted, but the > airframe is experiencing no net force and should be "hanging" straight > down from the shaft. I might believe, because the side force from the > tail acts a little lower than the opposing force from the rotor, that > the airframe would experience a small torque away from exactly > vertical. But I'd be surprised if this was a large effect -- Yes, this effect is larger if the tail rotor is lower mounted (i.e. Jet Ranger). But as far as I know this effect is stil large for a tail rotor above cg. At the bo the tail rotor is nearly at the same height as the rotor centre. But the forces of the (bo 105) rotor act not in the center of the rotor, but at the position of the (virtual) flapping hinges, which are far outside the center. If you sum they, you find, that they produce a much higher moment to the mast which result in a tilted heli.
> certainly real helicopters don't appear to be leaning while > hovering. :) But you never have looked for this phenomena? Look at a calm day to a hoovering helo and you can see it! > > Maybe I've misunderstood? > > Andy > Maik _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
