2024年2月1日 · All operating speeds are expressed as functions of this speed (for example, VREF = 1.3 VSmin). Because aircraft of the A320 family have a low-speed protection feature (alpha limit) that the flight crew cannot override, Airworthiness Authorities have reconsidered the definition of stall speed for these aircraft.

2023年7月28日 · 下图为a320-200飞机的f速度和 s速度 限制，其max spd即vfe，每档对应一个vfe （源自：三系飞行员） 丨 VFE NEXT：下一个形态最大速度

2023年8月14日 · Reference touchdown speed, denoted as Vref, is the calibrated airspeed at which an aircraft touches down on the runway during a landing. It represents the ideal speed at which the aircraft should make contact with the runway, taking into account various factors such as aircraft weight, configuration, and atmospheric conditions.

2008年11月6日 · An A320 at 64 tonnes (MLW = 66t): Vref, flap full, is 134 knots and Vref, flap 3, is 139 knots, so the normal approach speed is 139 knots and 143 knots respectively. F speed: Minimum speed at which the flaps may be retracted at takeoff. In approach, used as a target speed when the aircraft is in CONF 2 or CONF 3.

Vref速度 为143节，属于 D类 。 737MAX8 看看737MAX8在着陆参数，最大着陆重量（69.3吨），襟翼（Flap 40），标准海平面、ISA、静风、干跑道、自动刹车，防滞工作的情况。

2022年11月18日 · vref基准速度用于正常最终进近的基准速度。等于全形态的 1.23 × vs。如果在全形态下已作好着陆计划，该速度显示在 mcdu 的appr （进近）页面上(vls conf full)。vapp最终进近速度显示在 mcdu appr 页面上。 由 fmgc 计算。

Definition 1.3 times the stalling speed in the stated landing configuration and at the prevailing aircraft weight. This is the speed required as the landing runway threshold is crossed at a height of 50 feet in landing configuration if the calculated aircraft performance is to be achieved.

v2 vref vapp : 在一台发动机失效时，最迟在 35 ft 高度上获得的并在起飞的第二 阶段所保持的起飞安全速度。 由速度刻度带上的 SPEED SELECT 符号来表示。

2024年10月27日 · VREF is the approach speed used for landing, typically calculated as 1.3 times the stall speed in landing configuration. This speed provides a safe margin above the stall speed to ensure a stable approach and landing, allowing …

Vapp = Vref + Appr Cor. Here is how you determine the approach correction for A320 to get Vapp. There are some circumstances where you are required to reduce speed to Vls during the approach. And one of them is when you have to do an overweight landing.