Looking at the left side of the curve you can see that it rises slightly as you move from the hover. This rise in power requirement is due to the aircraft moving away from the ground cushion and losing the benefit of the big high pressure cushion beneath. This is between 0-12 Kts approx. At about 12-20 Kts the airflow across the disc is sufficient enough to start effecting the induced flow and reduce its effect. This is the point where the power required starts to drop off due to translational lift and the power curve changes direction and goes downwards.
Extremely good explanation, keep going
Love the videos, any chance of you doing one on recirculation. Thanks
can you describe the speed where the translational lift occurs in the graph?
Looking at the left side of the curve you can see that it rises slightly as you move from the hover. This rise in power requirement is due to the aircraft moving away from the ground cushion and losing the benefit of the big high pressure cushion beneath. This is between 0-12 Kts approx. At about 12-20 Kts the airflow across the disc is sufficient enough to start effecting the induced flow and reduce its effect. This is the point where the power required starts to drop off due to translational lift and the power curve changes direction and goes downwards.
Good explanation thanks
Please what do you mean by TR ( Thrust Reduction )and TQ.
Apologies. Poorly annotated. It should just say TQ not TR. the TQ comes down twice. TQ is always coloured yellow in my diagrams.