Often asked: Aviation What Is Vh?

What is VH speed?

VH is defined as the maximum speed in level flight with the maximum continuous power at sea level.

What is VX and VY?

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 VSO and VS1?

VS0 means the stalling speed or the minimum steady flight speed in the landing configuration. VS1 means the stalling speed or the minimum steady flight speed obtained in a specific configuration.

What is V ref?

VREF is a speed: That gives you at least a 23 percent margin over V SR0, reference stall speed in the landing configuration. That is at least as high a V MCL, minimum maneuver speed in the landing configuration.

What is V1 and V2 on takeoff?

A: V1 is the speed by which time the decision to continue flight if an engine fails has been made. V2 is the speed at which the airplane will climb in the event of an engine failure. It is known as the takeoff safety speed.

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What speed is VMC?

Familiar to pilots of multi-engine aircraft, Vmc is the speed below which aircraft control cannot be maintained if the critical engine fails under a specific set of circumstances (see 14 CFR part 23). It is marked as a red radial line on most airspeed indicators.

How do I find VX?

Projectile motion equations

  1. Horizontal velocity component: Vx = V * cos(α)
  2. Vertical velocity component: Vy = V * sin(α)
  3. Time of flight: t = 2 * Vy / g.
  4. Range of the projectile: R = 2 * Vx * Vy / g.
  5. Maximum height: hmax = Vy² / (2 * g)

What happens when VX and VY meet?

The Absolute Ceiling: Where Vx and Vy Meet Your “absolute ceiling” is the highest altitude you could possibly fly. At this altitude, the power available curve crosses through the lowest point of the power required curve. Now you can’t climb anymore because you’re out of excess power.

Why does VY increase with altitude?

Let’s move on to why Vy changes with altitude. Vy is the best rate of climb speed. It’s the speed that results in the greatest upward deflection on the VSI. Since an airplane’s rate of climb is a function of excess power, it stands to reason that the more excess power you have the higher the rate of climb will be.

What is the difference between VLO and VLE?

VLO is the airspeed at which the landing gear can be safely operated—extended or retracted. VLE is the maximum speed at which you can fly with the gear extended.

What are the V speeds in aviation?

Regulatory V-speeds

V – speed designator Description
V FE Maximum flap extended speed.
V FTO Final takeoff speed.
V H Maximum speed in level flight at maximum continuous power.
V LE Maximum landing gear extended speed. This is the maximum speed at which a retractable gear aircraft should be flown with the landing gear extended.
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Why are they called V speeds?

The “ V ” is from the French word ‘Vitesse’ which means ‘ speed ‘ or ‘rate’. Important aviation Airspeeds are identified and defined using standard terms. Scientists and Engineers refer to Airspeeds as ‘ V ‘ Speeds. Commonly, people think in terms of “ Velocity ”, and it is a nice memory aid, as “ Velocity ” begins with “ V ”.

What does VH stand for on Australian aircraft?

Aircraft flying within Australia must be included in the Australian Civil Aircraft Register. When the aircraft is registered, it is assigned a registration mark. The mark will be preceded by ‘ VH -‘, which is the assigned nationality mark for Australia.

What is the approach speed of a 737?

It does depend on the weight of the aircraft, but typically the approach speed of a 737 is around 145knots. The power is retarded and the nose flares just before touchdown, so the airspeed will now be around 125 knots in impact with the tarmac…

What speed does a Cessna land at?


Maximum Cruise Speed 124 ktas (230 km/h)
Landing Distance 1,335 ft (407 m)
Ground Roll 575 ft (175 m)
Service Ceiling 14,000 ft (4,267 m)
Maximum Climb Rate 730 fpm (223 mpm)

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