## How is aircraft climb rate measured?

A Vertical Speed Indicator (VSI), also known as a Rate of Climb and Descent Indicator (RCDI) is an instrument which indicates the rate of climb or descent of an aircraft.

## How fast do airplanes climb?

Most jets climb at 250 knots up to 10,000 feet due to FAA regulations. Above 10,000 feet, 280 to 300 knots with a transition to Mach . 7 around 24,000 feet are average for the 737.

How is the rate of climb related to rate of descent?

The temporal rate of decrease in altitude is referred to as the rate of descent ( RoD) or sink rate. A negative rate of climb corresponds to a positive rate of descent: RoD = -RoC. There are a number of designated airspeeds relating to optimum rates of ascent, the two most important of these are VX and VY .

### How is the rate of climb measured on an airplane?

In most ICAO member countries, even in otherwise metric countries, this is usually expressed in feet per minute (ft/min); elsewhere, it is commonly expressed in metres per second (m/s). The RoC in an aircraft is indicated with a vertical speed indicator (VSI) or instantaneous vertical speed indicator (IVSI).

### How does rate of descent affect aircraft performance?

It depends on the true airspeed (V) and the descent gradient: Rate of descent = V x sin (α) = V x Descent gradient = V x (Drag – Thrust) / Weight Two aircraft that have same rate of descent but different horizontal speed will have different descent gradients. The aircraft with the higher horizontal speed will have the lower descent gradient.

What is the rate of climb of a Cessna 172?

V x increases with altitude and V Y decreases with altitude until they converge at the airplane’s absolute ceiling, the altitude above which the airplane cannot climb in steady flight. The Cessna 172 is a four-seat aircraft. At maximum weight it has a V Y of 75 kn (139 km/h) indicated airspeed providing a rate of climb of 721 ft/min (3.66 m/s).

It depends on the true airspeed (V) and the descent gradient: Rate of descent = V x sin (α) = V x Descent gradient = V x (Drag – Thrust) / Weight Two aircraft that have same rate of descent but different horizontal speed will have different descent gradients. The aircraft with the higher horizontal speed will have the lower descent gradient.

## What happens during a climb or a descent?

Failure to vary the rate of cross-check during speed, power, or attitude changes or climb or descent entries Failure to maintain a new pitch attitude. For example, raising the nose to the correct climb attitude, and as the airspeed decreases, either over control and further Increase the pitch attitude, or allow the nose to lower.

## What’s the average climb rate of an airplane?

It depends allot on the aircraft you fly. For instance, the aircraft that I fly, the ATR 42 and ATR 72, are real dogs in the climb. Usually 1500 feet per minute is the max we can sustain, and 1000 feet per minute (or even less if we are very heavy) is more common.

V x increases with altitude and V Y decreases with altitude until they converge at the airplane’s absolute ceiling, the altitude above which the airplane cannot climb in steady flight. The Cessna 172 is a four-seat aircraft. At maximum weight it has a V Y of 75 kn (139 km/h) indicated airspeed providing a rate of climb of 721 ft/min (3.66 m/s).