What does V1 mean in flying?

V₁ is the maximum speed at which a rejected takeoff can be initiated in the event of an emergency. V₁ is also the minimum speed at which a pilot can continue takeoff following an engine failure.

What does V1 mean in aviation?

A: V1 is the speed by which time the decision to continue flight if an engine fails has been made. It can be said that V1 is the "commit to fly" speed. 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.

What is V1 for a 747?

What is the normal V1 speed for a commercial jet? For commercial aircraft such as the B737, A320 and even the large ones like the Boeing 747 Jumbo Jet or Airbus 380, a typical range for the V1 speed is between 120 – 140 knots.

What is V1 for a 737?

V1, approximately 145 KIAS, is decision speed. Above this speed, it may not be possible to stop the aircraft on the runway in case of a rejected takeoff (RTO). At Vr, approximately 145 KIAS, smoothly pull the stick (or yoke) back to raise the nose to 8 degrees above the horizon.

What does V2 mean in aviation?

V2: Takeoff Safety Speed. V2 is the minimum speed that needs to be maintained up to acceleration altitude, in the event of an engine failure after V1. Flight at V2 ensures that the minimum required climb gradient is achieved, and that the aircraft is controllable.

TAKE-OFF Speeds V1, Vr, V2! Explained by "CAPTAIN" Joe

What is v3 in aviation?

The speed at which the aircraft may safely climb with one engine inoperative. V_2min. Minimum takeoff safety speed. V₃. Flap retraction speed.

What does V1 mean?

V1 is defined as the speed beyond which the take-off should no longer be aborted. Meaning that in case you experience any trouble with your plane before reaching V1 you would immediately abort your take-off and would apply all the necessary means to bring the aircraft to a halt.

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.

Why do pilots say rotate on takeoff?

Summary. Long story short, pilots say rotate as a verbal queue that the aircraft has reached its predetermined V_r and hence appropriate inputs can be applied to safely pitch the aircraft in a nose-up attitude to gain lift.

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 plane?

Lockheed Martin's new hypersonic plane is expected to travel at Mach 6. The Lockheed Martin SR-72, which is rumored to be the world's fastest plane, is expected to make a test flight in 2025, eight years after its private proposal in 2013.

How fast does a 747 go when landing?

Airplanes rely on a braking system to safely land on runways. At cruising altitude, most commercial airplanes fly at a speed of roughly 500 to 600 mph. When landing, however, they must reduce their speed. A typical 747, for instance, has a landing speed of about 160 to 170 mph.

What speed does an A380 take off at?

Update: The take-off speed of an A380 depends on various factors such as weight, fuel, weather conditions etc. The wheels go up just after V2 (safe take-off speed), at a positive rate of climb. Under typical conditions, it is usually between 150-170 knots (170-195 mph or 275-310 kph).

Does V1 change with runway length?

V1 is definitely dependent on runway length and not just a performance number as someone has said above. It does depend on the system your company uses but, the simple fact that a runway has a limiting weight from an airport analysis limits V1 to comply with accelerate stop requirement whether calculated by FMC or not.

Why do pilots say blue?

The callout from the pilots like "LOC blue" serves to remind themselves of the current flight guidance modes, and to maintain awareness of mode changes. This is also to ensure that their mental idea of "what the aircraft will do next" is up to date and fits to the current flight situation.

What is the V1 speed for a 777?

V1, approximately 149 knots indicated airspeed (KIAS), is decision speed. Above this speed, it may not be possible to stop the aircraft on the runway in case of a rejected takeoff (RTO).

What does squawk 7777 mean?

Some squawk codes are reserved, such as 7700 (emergency), 7600 (communication failure), 7500 (hijacking), 1202 (glider), 1200 (VFR), etc. One of these, 7777, is apparently used for "military interception." What does this mean in the United States?

What do pilots say when landing?

Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliet, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu. Numbers get special treatment too.

Why do planes slow down after takeoff?

Answer: The sensation of slowing down is really one of slowing the rate of acceleration; this is due to reducing the thrust after takeoff to the climb setting. The sensation of “dropping” comes from the retraction of the flaps and slats. The rate of climb is reduced, causing it to feel like a descent.

What pilot says 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.”

Why do pilots say souls on board?

ATC: 4194 Say souls on board. (This is the ATC terminology for asking how many people are in the plane. It is the standard terminology, and when you file any flight plan that's the term for number of people on the plane; but when you hear it said out loud by a controller it's usually a bad sign.

What are the ladies on the plane called?

A flight attendant, also known as steward/stewardess or air host/air hostess, is a member of the aircrew aboard commercial flights, many business jets and some government aircraft. Collectively called cabin crew, flight attendants are primarily responsible for passenger safety and comfort.

What does VX mean in aviation?

An aircraft climbs because of excess thrust or excess power. Vx is your best angle of climb speed, and Vy is your best rate of climb speed.

How fast is a 747 going at takeoff?

The 747 goes from its approximate takeoff speed of 200 mph (89.4 meters per second) to 0 mph in 27 seconds.