2nd October 2019

flyingmag

16

What is VAC speed?

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VAC — Missed-approach climb speed for flap configuration with critical engine inop (2.1 percent climb gradient). VAP — Approach target speed. VREF plus configuration (flaps/slats setting) and wind factor. Typically add (to VREF) half the headwind component plus all the gust factor (to a max of 20 knots).

Regarding this, what is the speed for takeoff?

A headwind will reduce the ground speed needed for takeoff, as there is a greater flow of air over the wings. Typical takeoff air speeds for jetliners are in the 130–155 knot range (150–180 mph, 240–285 km/h). Light aircraft, such as a Cessna 150, take off at around 55 knots (63 mph, 100 km/h).

What is the v1 speed for a 747?

Aircraft	Takeoff Weight	Takeoff Speed
Boeing 757	240,000 lb 108,860 kg	160 mph 260 km/h 140 kts
Airbus A320	155,000 lb 70,305 kg	170 mph 275 km/h 150 kts
Airbus A340	571,000 lb 259,000 kg	180 mph 290 km/h 155 kts
Boeing 747	800,000 lb 362,870 kg	180 mph 290 km/h 155 kts

1

What is VX speed?

Vx is the slowest (IAS), and is the Maximum ANGLE of climb. It allows one to climb to altitude within the shortest horizontal distance. Vy is slightly faster, and is the Maximum RATE of climb. It allows one to climb to altitude in the shortest time.

2

What is minimum unstick speed?

Vmu means minimum unstick speed. It is the calibrated airspeed at and above which the airplane can safely lift off the ground and continue the takeoff.

3

What is takeoff safety speed?

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.

4

What is the maneuvering speed?

VA or maneuvering speed is the speed calculated by the manufacturer at which the aircraft will stall before exceeding maximum G loading, thus preventing damage to the air-frame. Maneuvering speed is usually determined by multiplying the flaps-up, power-off stall speed by the square root of 3.8 Gs, which is 1.95.

5

What is VLO speed?

Vle is the maximum speed at which the landing gear may be Extended, and Vlo is the maximum speed at which the landing gear may be Operated. “ Operated” in this context means transitioned from up to down or vice versa. “

6

What is the VR speed?

Definition. Vr is defined as the speed at which the rotation of the aircraft should be initiated to takeoff attitude.

7

What is VSO speed?

VS Stall speed or minimum steady flight speed for which the aircraft is still controllable. VS0 Stall speed or minimum flight speed in landing configuration. VS1 Stall speed or minimum steady flight speed for which the aircraft is still controllable in a specific configuration.

8

What is VMO speed?

If the flight manual/specification says maximum speeds are: Vmo = 350 knots, Mmo = M.82. Vmo is the maximum airspeed at which an aircraft is certified to operate. Mmo is the maximum Mach number at which an aircraft has been certified to operate.

9

What is V speed?

Incorrectly, or as an abbreviation, some documentation refers to V_ref and/or V_rot speeds as "V_r." V_S. Stall speed or minimum steady flight speed for which the aircraft is still controllable. V_S₀. Stall speed or minimum flight speed in landing configuration.

10

What is vs1?

Vs and Vs1. Now that you are familiar with Vs0, it's easy to remember Vs1. The beginning of the Green Arc is the power off Stalling Speed with the Gear and Flaps retracted. Vs is the Velocity (V) of the Stall (s), or minimum steady flight speed for which the aircraft is still controllable.

11

What is the VREF speed?

The final approach speed is based on the reference landing speed, VREF. VREF usually is defined by the aircraft operating manual (AOM) and/or the quick reference handbook (QRH) as: 1.3 x stall speed with full landing flaps or with selected landing flaps.

12

What is the VNO speed?

Vno - Maximum Structural Cruise Speed - When cruising at, and below, Vno the aircraft should not be damaged by a 30 feet/second vertical gust. It is indicated by the top end of the Airspeed Indicator's Green Arc. Smooth air only for speeds in the Yellow Arc.

13

What is the VMCG?

Vmcg is defined as the minimum speed, whilst on the ground, that directional control can be maintained, using only aerodynamic controls, with one engine inoperative (critical engine on two engine airplanes) and takeoff power applied on the other engine(s).

14

What is MMO speed?

VMO/MMO is defined as the maximum operating limit speed. VMO is expressed in knots calibrated airspeed (KCAS), while MMO is expressed in Mach number. The VMO limit is usually associated with operations at lower altitudes and deals with structural loads and flutter.

15

What is Vsse?

Intentional One Engine Inoperative Speed (Vsse) Vsse, is specified by the airplane manufacturer in new Handbooks and is the minimum speed at which to perform intentional engine cuts. Use of Vsse is intended to reduce the accident potential from loss of control after engine cuts at or near minimum control speed.

16

What is the definition of true altitude?

True Altitude is height above mean sea level (MSL). • Absolute Altitude is height above ground level (AGL). • Pressure Altitude is the indicated altitude when an altimeter is set to 29.92 in Hg (1013 hPa in other parts of the world).

17

What is v2 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.

18

What is a VNO?

A Virtual Network Operator (VNO) or Mobile Virtual Network Operator (MVNO) is a provider of management services and a reseller of network services from other telecommunications suppliers that does not own the telecommunication infrastructure.

19

What is v1 in psychology?

MeSH. [1] The visual cortex refers to the primary visual cortex (also known as striate cortex or V1) and extrastriate visual cortical areas such as V2, V3, V4, and V5. The primary visual cortex is anatomically equivalent to Brodmann area 17, or BA17.

20

What is VMCA in aviation?

Vmca is defined as the minimum speed, whilst in the air, that directional control can be maintained with one engine inoperative (critical engine on two engine aerolanes), operating engine(s) at takeoff power and a maximum of 5 degrees of bank towards the good engine(s).

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