Hello,
Vx is the speed that will give the best glimb gradient, the maximum gain in altitude in the shortest distance.
Vy is the speed that will give the best rate of climb, the maximum gain in altitude in the shortest time.
Assume the following senario,
You are flying an aircraft an above you lets say 1000 feet and 10 miles away is another aircraft approaching on the reciprocal track. You want to climb and cross his flightpath. will you climb at Vy or Vx to gain the maximum separation when crossing his flightpath?
what i was thinking is that Vy will get you nearer to the other aircraft earlier. Vx will give you a good gradient but will do so taking a longer time and therefore the aircraft will be nearer again.
Treating the other aircraft as an obstacle i am more tempted to choose Vx as the climb speed.
