# Quick Answer: How Fast Is A Commercial Jet?

## How fast is a 747 going when it lands?

A typical fully loaded 747 would be landing at around 25,0000kgs.

The landing speed would be around 145kts-150kts (166mph-172mph) depending on the landing flap setting selected.

The greater the flap setting the lower the speed.

We generally fly the approach speed faster than this to allow a ‘buffer’..

## How long does a commercial jet last?

On average, an aircraft is operable for about 30 years before it has to be retired. A Boeing 747 can endure about 35,000 pressurization cycles and flights—roughly 135,000 to 165,000 flight hours—before metal fatigue sets in. 747s are retired after approximately 27 years of service.

## Why do commercial airliners fly at 35000 feet?

The “sweet spot” of flying is regarded as between 35,000 and 42,000 feet – too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater. This optimum height is linked to the usual weight of a commercial jet – that is, heavier planes fly lower, and lighter higher.

## How much does a GE jet engine cost?

General Electric GE90GE90Number built2,800 by July 2020Program cost\$2 billion, high thrust: \$500 millionUnit costUS\$27.5 million list price (2011)Developed intoGeneral Electric GEnx Engine Alliance GP7000 General Electric GE9X8 more rows

## How fast does a plane take off?

Typical takeoff air speeds for jetliners are in the range of 240–285 km/h (130–154 kn; 149–177 mph). Light aircraft, such as a Cessna 150, take off at around 100 km/h (54 kn; 62 mph). Ultralights have even lower takeoff speeds.

## Why do pilots say heavy?

The word “heavy” means a larger aircraft type, with a Maximum Takeoff Weight of 160 tonnes or more. These aircraft create wake turbulence from their wings and require extra separation between following aircraft, and the use of “heavy” reminds other pilots of that fact.

## What is the fastest jet in the world?

Lockheed SR-71 BlackbirdThe Lockheed SR-71 Blackbird is the fastest jet aircraft in the world, reaching speeds of Mach 3.3–that’s more than 3,500 kph (2,100 mph) and almost four times as fast as the average cruising speed of a commercial airliner. Key elements of the SR-71’s design made this possible.

## Can a commercial jet break the sound barrier?

Monday’s record was above the speed of sound– which is 767 mph– however, whether air travel breaks the sound barrier is dependent on its airspeed, not ground speed. Commercial aircraft are not designed to fly at supersonic speeds.

## What do pilots usually say before takeoff?

Usually, the Captain will make a small briefing before take-off, sometimes indicating the priority for take-off (e.g. “We are third in priority for take-off, we should depart in about five minutes”). But there is always an announcement like: “Flight attendants, prepare for take-off please.”

## How fast is a commercial plane?

926 km/hThe typical cruising airspeed for a long-distance commercial passenger aircraft is approximately 880–926 km/h (475–500 kn; 547–575 mph).

## How long can a commercial plane fly without refueling?

21 hoursPlanes can now fly for 21 hours non-stop.

## What is the slowest speed an airplane can fly?

Technically this is the so-called ‘stall speed’, where air passes over the wings fast enough to sustain altitude, and for small planes this can be less than 50km/h (31mph). But at such low speeds, the aircraft is easily destabilised, and could fail to leave the runway.

## What is the lifespan of a private jet?

On average, business jets up to 25 years old may only have about 12,000 hours on them, and when they’re well-maintained aircraft can easily last for 25,000 hours.

## Why do pilots say Niner?

Aviators often speak “pilot English” to avoid miscommunications over radio transmission. “Tree” for instance, means three, “fife” is the number five and “niner” means nine, says Tom Zecha, a manager at AOPA. The variations stemmed from a desire to avoid confusion between similar-sounding numbers, he says.

## Do pilots die younger?

The data in Figure 6 indicate a trend toward increased pilot deaths in the younger age in- tervals (60-62, 63-65 and 66-68) compared with the general population, and that there is a sharp decrease in the number of pilot deaths from age 69 on.