Thanks, G & L, I'll try to work through and understand this.
But what prompted the question is:
"...Va can be considered to be constant regardless of aircraft weight..."
The Cessnna 206 has different Va's
3 600 lbs 120kias
2 950 lbs 108kias
2 300 lbs 96kias
Now, after a paradrop (very light +-2 300lbs), the descent is at about 140kias with turns at 30 degrees and sometimes light to moderate turbulence.
Should I be concerned?
All the best,
p