V speeds

Rare card · No. 72614

In aviation, V-speeds are standard terms used to define airspeeds important or useful to the operation of all aircraft. These speeds are derived from data obtained by aircraft designers and manufacturers during flight testing for aircraft type-certification. Using them is considered a best practice to maximize aviation safety by adhering to that particular aircraft model’s critical performance characteristics. The actual speeds represented by these designators are specific to a particular model of aircraft or, if the aircraft has been modified such that it’s critical speeds have changed, that exact aircraft (the new V-speeds may be placarded beside the airspeed indicator (ASI) [needs reference]). They are expressed by the aircraft's indicated airspeed (and not by, for example, the ground speed), so that pilots may use them directly, without having to apply correction factors, as aircraft instruments also show indicated airspeed. In general aviation aircraft, the most commonly used and most...

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