[NSRCA-discussion] Weather Vane

[george w. kennie]

 "<<<<Just as if another airplane were to plow into the side of it. It's going to move.>>>>"

Yeah, like just as if another airplane were to plow into the side of it back by the vertical fin it's going to rotate, but "only if it's fastened to the ground". (Wow)

Oh yeah, I agree that the airplane flies straight into the "freestream", but this deviation from our parallel flight path is generated by the force of the crossing air, the effect of which is produced by the fact that the lever arm of the vertical fin is 2+ times the length of the nose (from the C.G.) multiplying the side force aft and thus creating the offset.
Me again.
























  ----- Original Message ----- 
  From: rjo626 at aol.com 
  To: nsrca-discussion at lists.nsrca.org 
  Sent: Thursday, October 11, 2007 7:39 AM
  Subject: [NSRCA-discussion] Weather Vane


       The airplane doesn't "know" anything.
   It doesn't know that when air pressure is less on any one side of it that it's supposed 
  to go in that direction. It doesn't know that when we apply throttle, it's supposed to 
  go forward. We create these situations with inputs and the airplane responds. The 
  airplane doesn't know to fly slower against the wind, and faster down wind. It's a matter
  of physics and what the airplane is designed to do. If wind is forced against the side of 
  the airplane, no, it does not know what's going on, but it will react. Just as if another 
  airplane were to plow into the side of it. It's going to move.
                                                                               RJO

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