Can you calculate a Vx for an aircraft which does not list the speed in the OM?

Question

Can you calculate a Vx for an aircraft which does not list the speed in the OM?

Answer 1

You could if you knew a lot of other things about the airplane.  Vx is actually a definable number that exists where Thrust available over Thrust required is maximized.

If you knew those numbers you could.  But those are really hard to get.

Answer 2

i think it depends on the aircraft's maximum ramp mass, its aerodynamic performance/limitations, and the power of its engine... put them all together and you'd need a darn good mathematician to come up with an airspeed that gets a plane as high as it can with the least possible distance. i'm pretty sure the manufacturers have already calculated that figure even before the plane is built.

Answer 3

it is normally done empirically.

Answer 4

Climb across a fixed distance at different speeds, and find the speed that gives you the most altitude gain.