PPRuNe Forums - View Single Post - Ditching a helicopter: (incl pictures)
View Single Post
Old 17th November 2001 | 06:18
  #49 (permalink)  
Nick Lappos
Guest
 
Posts: n/a
Post

heedm,
Your last post hit the nail on the head. I think we see it the same way now.

Sproket,
Try not to think about gyroscopic precession, its effects are small at the roll and pitch rates we are talking about here. The rotor will automatically fly itself back to the position commanded by the flight controls, even if the aircraft and mast are rolling around due to wave forces (which are the same wether the aircraft is floating or on a ship). The reason is that the swashplate will hold its position relative to the mast, and as the mast is rolled and pitched, it will send the proper control inputs via the pitch links to the rotorhead. In reality, there is no precessional force, and no unusual rotor behavior due to the rolling (as long as the rates are in the few degrees per second range).

The Lu bugaboo about unstable rotor behavior that he pushed in his earlier posts is backwards, as the rotor is actually too stable relative to the airframe, so it develops aerodynamic forces due to the wind that accompanies the waves. It is the combination of the wind and the wave slope that eventually could roll the aircraft, not funny gyro or unstable rotor forces.

Lu, I have NEVER used your age against you, nor will I. I have strong respect for tolerance regarding age, race and sex, and I resent your slur in that vein. Your posts are simply inane, not due to age, due to your inability to realize what you do not know, and your inability to learn. These are not age issues, I think. I have lots of respect for your experience, and your breadth of knowledge. It is you that destroys your own credibility when you venture so far from what you know, and when you keep pressing the same old bull into every post.

I absolutely refuse to answer your posts, I will be glad to discuss issues with any other ppruner.
 
Reply