Originally Posted by Hazelnuts
The point where the second tangent touches your curve is the airspeed for max angle of climb in a 10 kt headwind.
I have been thinking about this all day and still do not understand. If you change the airspeed axis to groundspeed (ie applying wind to the IAS), I agree you may be showing the achieved gradient but that must be still at the same groundspeed.
Are you suggesting that if you slow down twenty knots (IAS), the gradient will increase?