Trivia question III

This week trivia question of aviation~~

When the aircraft on take off process, the pilot will said "Vee One (V1)" --> "Vee R (VR)" --> "Vee Two (V2)" when they're on rotate process~~

So, what's the full meaning of V1, VR and V2??

Okay, let my be the firsty mate to try

V1: which is a speed that you cannot safty stop within the runway (so if you perpare to not take off after V1, you will be out of runway)

VR: Reaching Take off speed.

V2: Plane fully take off.

[ 本帖最後由 tristan 於 2006-5-1 15:25 編輯 ]

好
等我呢個 flightsim ATP 試下答啦

V1(Takeoff Decision Speed) 其實係指響跑道加速時ge一個 decision speed
響速度未到 V1 時
如果飛機有咩頭暈身熱
就要馬上放棄起飛
盡快將飛機煞停
如果飛機已經超過左 V1 先至發生問題ge話
咁就要繼續起飛
等飛左上天先至處理

VR(Rotation Speed) 其實係指可以(同埋應該)開始抽機頭ge速度

V2(Minimum Climb Speed) 就係指飛機上升到離地35呎時所需要keep住ge最慢速度
即係話最好飛機響接近呢個速度至離地
呢個速度亦都係飛機響壞左其中一個引擎(當係雙發機)時仍然可以繼續飛行ge速度

以小弟ge學識裡面
響起飛ge過程中
機師見到飛機ge速度到左80節(IAS)ge時候會叫聲"80 knots"
到V1時會叫"Vee 1"
到VR時會叫"Rotate"
再跟住響到V2時會叫"Vee 2"

以773(唔係ER)為例
響海平面高度+標準溫度+Flaps 5
V1係153節
VR係156節
V2係162節
(只作參考 實際速度係仲靠好多parameters計出黎)

[ 本帖最後由 kychung 於 2006-5-1 17:00 編輯 ]

Wow.......This question is seems very hard for u guys~~

OK, here is the exact answer of this Trivia Question~~

V1 = Take-off Decision Speed, u need to decide would u going flying during V1~~

VR = Take-off Rotation Speed, the pilot on "Pilot Flying" starting to pull the controller (Airbus is using joystick, Boeing is using U-shape control column) smoothly, the nose of ur plane is starting to off the ground~~

V2 = Safety Take-off Speed, minimum safe engine out speed.