For a light twin, blue line is Vyse, best rate of climb single engine, alot of times close or similar to Vy.
The first red radial line is Vmc, the important twin thing. Has nothing to do with climb capabilities, or Vx/Vy etc.
On most light twins it is possible to climb out on Vx
There is a safety aspect to it though. Climbing with Vx gives you alot higher pitch, and a speed usually close to Vmc, or Vs.
So if you would loose one engine, you have to react alot quicker getting the nose down, which has to travel more down too, then for instance when you would be climbing at Vy(se) or higher.
and on the pedantic note, Vx and Vy contrary to stated above, can be the same. This will be the case at your absolute ceiling. (and by your, i mean the airplane's)
-IBLB-
Last edited by -IBLB-; 3rd Jun 2005 at 15:34.