Contents
What is VY and VX?
Vx is the speed where you have the most excess force (thrust), and Vy is the speed where you have the most excess power (horsepower).
What is climb power?
Introduction: Climb performance is a measure of excess thrust which generally increases lift to overcome other forces such as weight and drag.
What is a maximum performance climb?
The maximum performance climb demonstrates the thrust power of the aircraft as well as its precise flight controls.
Why are VX and VY different?
Vx is the slowest (IAS), and is the Maximum ANGLE of climb. It allows one to climb to altitude within the shortest horizontal distance. Vy is slightly faster, and is the Maximum RATE of climb. It allows one to climb to altitude in the shortest time.
Why do you need a specific climb profile?
Certain conditions will call for a specific climb profile (Vy or Vx) Increased airflow over the engine while at high power One of the most basic considerations with regard to aircraft performance is weight, as it is a principle of flight
When to use the best rate of climb?
Best rate of climb, or Vy, maximizes velocity to obtain the greatest gain in altitude over a given period of time Vy is normally used during climb, after all obstacles have been cleared It is the point where the largest power is available Certain conditions will call for a specific climb profile (Vy or Vx)
Is there a minimum climb performance for part 25?
Part 25 does not mandate the first, second, third, and final segment nomenclature but does mandate minimum climb performances for these segments at the noted altitudes: (2-engine aircraft numbers)
What are climb performance numbers for two engine aircraft?
When the aircraft is certified, manufacturers are required to reduce their actual climb performance numbers by this safety factor, 0.8% in the case of the two-engine aircraft. What you see in the AFM, PH, and FMS are these “net climb gradient” numbers.