Questions tagged [v-speeds]
Questions on the critical speeds of an aircraft guiding elements such as rotation, climb, and maneuvering.
102 questions
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Would longer runways allow pilots to cancel a takeoff for failures that right now are too far into the takeoff to allow for a deceleration?
I think V1 is partly a function of how much runway length there is to decelerate and stop (correct me if I'm wrong).
If runways were required to be longer, would that allow for a greater number of ...
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Do Vx and Vy vary with flap configuration?
I know that Vx and Vy will change as altitude increases, but do Vx and Vy also vary with aircraft configuration (flaps,landing gear etc)?
In the C172 POH it only details the Vx number but not the ...
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Correct Vref additive on B737 NG
On the B737 NG, the Vref additive for approach is made by taking half of the steady headwind component + the full gust value (never lower than +5kts and max. +15kts). Landing Runway 29 Wind 27010G20 ...
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Why doesn't pitching up above vx result in a better angle of climb
Like technically, you could pitch up higher. I have drawn a (greatly exaggerated) picture to show what I mean.
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Is the airspeed for best endurance also the airspeed for best angle of climb?
Understanding that for a propeller driven aircraft, the airspeed for best endurance is the speed at which minimum power is required, and obviously the prop is more efficient at producing thrust at ...
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When losing all engines, can an airliner pilot use the autopilot to maximize the gliding distance?
In case all engines become inoperable mid-flight, an airliner essentially becomes a glider too heavy to maintain altitude.
In this life-and-death situation, can the pilot select a "best glide ...
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What is the speed of 1.32 Vmd?
*Aeroplane CL/CD polar curve
(Image Source: Principles of flight. ATPL ground training series - Author: CAE Oxford Aviation Academy (UK) Limited 2014)
I’m studying Flight Mechanics in my textbook and ...
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Calculate the radius, speed and sink rate of a glider with a specific bank angle in a steady turn
For a glider, what is the radius, speed and sink rate of a glider with a specific bank angle in a steady turn while flying at minimum sink speed -> speed where $\frac{{c_L}^3}{{c_D}^2}$ is max.
I ...
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Why do flaps affect Vmc?
While looking at several Type Certificate Data Sheets for business jets, I have noticed that there is a common theme relating to their VMC in that the VMC (airborne) are lower when the flaps are ...
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Minimum sink speed and maximum endurance speed
For a given airplane, are the minimum sink speed and maximum endurance speed the same?
Thankyou
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Why is higher V1 preferred over lower V1 in takeoff performance calculations?
I am using a takeoff performance application that seems to prioritize a higher V1 speed whenever there is extra runway available. It does this as long as the Acceleration-Stop Distance (ASD) remains ...
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Do Vx and Vy speeds refer to IAS or TAS?
I've had this discussion with my FI: Are speeds such as Vx and Vy referring to IAS at all times or TAS that needs to be compensated for?
Here's an example. Let's assume the following:
Vy of my single ...
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How do you determine VMCG, if its yawing moment by the inoperative engine is only be corrected by the rudder?
The requirement of VMCG is:
VMCG, the minimum control speed on the ground, is the calibrated airspeed during the takeoff run at which, when the critical engine is suddenly made inoperative, it is ...
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Is my understanding about Balanced Field correct?
We have two definitions:
Balanced Field where Takeoff Distance Required = Accelerated Stop Distance Required
Balanced V1 = This is the speed where on a balanced field length (TODR=ASDR) if we have ...
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Helicopter V speeds explanation
I am reading Cat A heli procedures, and there is Vtoss speed, so what is the difference between Vx(best angle of climb speed) and Vtoss(take off safety speed) ?
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