Vy and Vx make sense to me. They are used for fastest height gain at a given time and biggest angle of climb. But what is the purpose of that speed (it's from DA20 POH)? It's only 3 kts faster than Vx.
pic:
www.i.stack.imgur.com/A2QVy.png
I just can't understand the purpose of this speed. I can use Vx and I will be well over any obstacles ahead. Maybe this speed is used as some kind of benchmark for calculation of ground roll & takeoff distance that will place me exactly at 50ft height over end of a runway?
it is also should to be maintained during engine failure after takeoff.
pic:
sketch 1501933501463 ? imgbb.com