Originally Posted by
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When talking about crosswind limits, what you need to remember is that the manufacturer of an aircraft is legally required to demonstrate a landing with a crosswind component that's an x percentage of Vs0 before the aircraft can be certified. If the aircraft has a low Vs0, the demonstrated crosswind capability will therefore be relatively low too. And that's the number that goes into the POH.
The exact words in part 23 (which covers most of the aeroplanes that most of us fly) are...
Originally Posted by EASA CS23
CS 23.233 Directional stability and control
(a) A 90° cross-component of wind velocity,
demonstrated to be safe for taxying, take-off and
landing must be established and must be not less
than 0·2 VS0.
(b) The aeroplane must be satisfactorily
controllable in power-off landings at normal
landing speed, without using brakes or engine
power to maintain a straight path until the speed
has decreased to less than 50% of the speed at
touchdown.
(c) The aeroplane must have adequate
directional control during taxying.
(d) Seaplanes must demonstrate satisfactory
directional stability and control for water
operations up to the maximum wind velocity
specified in sub-paragraph (a).
CS 23.1585 Operating procedures
(a) For all aeroplanes, information
concerning normal, abnormal (if applicable) and
emergency procedures and other pertinent
information necessary for safe operation and the
achievement of the scheduled performance must be
furnished, including –
(1) An explanation of significant or
unusual flight or ground handling
characteristics;
(2) The maximum demonstrated values
of crosswind for take-off and landing and
procedures and information pertinent to
operations in crosswinds;
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