From d60f70ea910c7b96ae8053a0d4d4e3d3ed18fdc8 Mon Sep 17 00:00:00 2001 From: Frank Kopp Date: Thu, 23 Jun 2022 00:12:48 +0200 Subject: [PATCH] Added warning for V/S in beginners guide (climb/descent). --- docs/pilots-corner/beginner-guide/descent.md | 11 ++++++++++- .../beginner-guide/takeoff-climb-cruise.md | 8 ++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/docs/pilots-corner/beginner-guide/descent.md b/docs/pilots-corner/beginner-guide/descent.md index 12bdf8148..743b79891 100644 --- a/docs/pilots-corner/beginner-guide/descent.md +++ b/docs/pilots-corner/beginner-guide/descent.md @@ -257,7 +257,16 @@ A few minutes before we reach our calculated descent point (TOD) we request clea When clearance is given we can start our descent to the flight level or altitude ATC has given us. -For descending we set the new flight level or altitude in the `FCU` with the `altitude selector`. We can then either push the selector for Managed Altitude Mode (constraints are respected, also know as VNAV) or pull the selector for `Selected Altitude Mode` (constraints are ignored). You can also use the `V/S selector` to set a specific descent vertical velocity. Pull the `V/S selector` to start the descent. +For descending we set the new flight level or altitude in the `FCU` with the `altitude selector`. We can then either +push the selector for Managed Altitude Mode (constraints are respected, also known as VNAV) or pull the selector for `Selected Altitude Mode` (constraints are ignored). + +!!! warning "Using V/S" + It is not recommended to use V/S for climbing or descending in the A320 (at least not for beginners) as the V/S + guidance has priority over the speed guidance and speed needs to be watched very closely when using V/S. +

+ If the selected target V/S is too high (relative to the current thrust condition and speed), the FMGC will steer the aircraft to the target V/S, but the aircraft will also accelerate or decelerate. When the speed reaches its authorized limit, V/S automatically decreases to maintain the minimum or maximum speed limit. +

+ See also [Protections](../advanced-guides/protections/overview.md). ![FUC with ALT and V/S selector](../assets/beginner-guide/descent/FCU-AP-selector.png "FUC with ALT and V/S selector"){loading=lazy} diff --git a/docs/pilots-corner/beginner-guide/takeoff-climb-cruise.md b/docs/pilots-corner/beginner-guide/takeoff-climb-cruise.md index 1d9309a4e..76ac471ea 100644 --- a/docs/pilots-corner/beginner-guide/takeoff-climb-cruise.md +++ b/docs/pilots-corner/beginner-guide/takeoff-climb-cruise.md @@ -370,6 +370,14 @@ Thrust level is `THR CLB`, vertical mode is `CLB` (ALT mode armed), lateral mode Typically, the climb to the flight plan's cruise level (e.g., FL210) happens in several steps (step climbs). Each to be instructed and cleared by ATC. +!!! warning "Using V/S" + It is not recommended to use V/S for climbing or descending in the A320 (at least not for beginners) as the V/S + guidance has priority over the speed guidance and speed needs to be watched very closely when using V/S. +

+ If the selected target V/S is too high (relative to the current thrust condition and speed), the FMGC will steer the aircraft to the target V/S, but the aircraft will also accelerate or decelerate. When the speed reaches its authorized limit, V/S automatically decreases to maintain the minimum or maximum speed limit. +

+ See also [Protections](../advanced-guides/protections/overview.md). + **Passing 10,000ft**
Turn off landing lights and when the aircraft is stable (weather, no turn, etc.) you can turn off the seatbelt signs. The aircraft will now accelerate to CLB speed (defined in `MCDU PERF CLB` page).