# Quick Answer: What Affects V1 Speed?

## Can VR be less than v1?

No.

V1 can be equal to Vr, but not greater than it..

## Why do pilots say Niner?

The reason for these somewhat strange pronunciations is to encourage the pilot/controller to enunciate clearly, so that the numbers are clearly understood. … The reason for “Niner” is that “Nine” can be easily muffled, slurred, or confused with other words (particularly the number Five/Fife).

## What do pilots say before taking off?

ATC will either say “Expedite Departure” or “No Delay” to let the aircraft know to get it in gear and take off immediately. A radio call from ATC would go something like this: ATC: “Cessna 128DP, cleared for take off, runway 16, no delay, straight out departure approved”

## What is the v1 speed for a 737?

approximately 145 KIASV1, 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).

## How is v1 speed calculated?

V1 is determined by several factors but the one most important factor is called the “accelerate / decelerate distance”. In other words, the distance it will take to stop the aircraft before the aircraft runs out of runway or continue safely into the air.

## What is the takeoff speed of a 737?

AircraftTakeoff WeightTakeoff SpeedBoeing 737100,000 lb 45,360 kg150 mph 250 km/h 130 ktsBoeing 757240,000 lb 108,860 kg160 mph 260 km/h 140 ktsAirbus A320155,000 lb 70,305 kg170 mph 275 km/h 150 ktsAirbus A340571,000 lb 259,000 kg180 mph 290 km/h 155 kts2 more rows

## What is take off speed?

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 v1 rotate?

Pilots say rotate because it is a verbal queue that an airplane has reached its predetermined rotation speed (frequently abbreviated to Vr). This is the speed at which control inputs can be applied to lift the nose off the runway and make the airplane fly away.

## What is VMBE?

The maximum brake energy speed. It is a function of the gross weight, altitude, temperature, runway slope, wind component, and braking configuration.

## Do pilots die younger?

One from 1992, for Flight Safety Digest – a former publication of the US-based Flight Safety Foundation – concluded that pilots do die at a younger age than the general population, based on two main data sources. … The study lists “physical and emotional” stressors that are thought to affect airline pilots’ health.

## Why do pilots say heavy?

In the United States, the term heavy is used during radio transmissions between air traffic control and any aircraft which has been assigned a maximum takeoff weight (MTOW) rating of 136 tonnes (300,000 lb) or more. All aircraft produce wingtip vortices that create wake turbulence in flight. …

## What is the v1 speed for a 747?

approximately 159 KIASV1, approximately 159 KIAS, is decision speed.

## What is minimum unstick speed?

VMU (Minimum Unstick Speed) VMU is the calibrated airspeed at and above which the airplane can safely lift off the ground, and continue the takeoff.

## 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 v2 speed in aviation?

Definition. The takeoff safety speed which must be attained at the 35 ft. height at the end of the required runway distance. This is essentially the best one-engine inoperative angle of climb speed for the airplane and is a minimum speed for flight in that condition until at least 400 ft. above the ground.

## What does squawk 7777 mean?

§ military interception§ military interception (US) (“Under no circumstances should a pilot of a civil aircraft operate the transponder on Code 7777. This code is reserved for military interceptor operations.”) § non-discrete code used by fixed test transponders (RABMs) to check correctness of radar stations (BITE).

## Why do pilots say Roger?

Before voice communication, pilots used morse code and instead of tapping out that a message was “received” they used shorthand and just tapped out “r” (short long short). … But just saying “r” could lead to communication errors. So they took “Roger” from the U.S. phonetic alphabet.

## What is v1 speed?

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.