Single engine normal climbout: Vx or Vy?
I tried to search for a topic regarding this matter, but to no success. If this has been discussed before then I would appreciate a link to the appropriate thread.
In a normal climb out (no obstacles) in a small typical single engine airplane (say a C-172), what is the safest airspeed to use in regards to having an engine failure after rotation: Vx or Vy?
I have always been taught that Vy is the best speed, simply because it will get you to the safe turn-back altitude faster. Therefore, you minimize the "prayer-zone" on the take-off where you have no other choice than flying straight ahead and hope for the best.
Some very experienced fellow instructors of mine argue that Vx is more efficient because it will get you closer to the runway for a given altitude, and that it will therefore be easier to make the runway.
Please share your thoughts!