Green Dot Speed
I recently come across the phase "green dot speed" I understand that it is the lowest L/D ratio for the given weight and condition of flight ? correct ?
when is it normally used ? Is it similar to Boeing flap up speed or v2 +100 ?
Also came across the Airbus perf charts ? what is T ref , T max, Grad 1 and Grad 2 ? How do u use the figures ?