Explain, using the graph below, why a climbing path at an angle (versus performing a vertical climb) is recommended for safety at helicopters take-off. Hint: Fig. 7.1 2_Heli_Perf_FAA.pdf. FEET AGL 700 650 600 550 500 450 400 350 300 250 200 150 100 50 DEMONSTRATED CONDITIONS: SMOOTH HARD SURFACE WIND CALM AVOID OPERATION IN SHADED AREAS 10 20 30 40 50 60 80 90 100 110 120 130 KIAS HEIGHT - VELOCITY DIAGRAM