Fig.2

  Force             Description               Why Do I Care?
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                  A body at rest will         As the rotor turns...
                  remain at rest or a         centrifugal force comes
  Inertia         body in motion will         from inertia...
                  remain in motion until
                  acted upon by an 
                  outside force.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
                  The force required to       A very important 
                  change a motion is          principle for
                  proportional to its mass    helicopters. When
                  and the rate of change      forces are unbalanced,
                  in its velocity.            motion changes. Lift,
                                              thrust, weight and drag
  Acceleration                                are what we're talking
                                              about. The greater the
                                              unbalance of forces the
                                              greater the change.
                                              Total Aerodynamic Force
                                              is the resultant force
                                              between lift and drag.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
                  For every action            Torque and anti-torque.
                  there is an equal           Tail rotor for most of
  Action-Reaction and opposite reaction.      us, opposite turning
                                              rotors for you
                                              tandem guys and gals.
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