definition of Max wind speed

[PEI_3721]

There are several threads which have offered a range of views.
Aircraft certification requires that the manufacturer publishes a maximum demonstrated crosswind, which shows that the aircraft may be landed without ‘exceptional’ skill for crosswinds from either side.
If the max demonstrated is considered to be limiting then it is published as a limitation the AFM limitations section.

There are many problems with max demonstrated. Some manufacturers publish additional information such as gusts, more rarely, advice on wet or slippery runway surfaces.
There can be significant errors in wind measurement and reporting.
Opposed to most other ‘speed’ limits in operation, crosswind certification values have no margin for error.
For gusts, there are many unknowns, the duration, direction change, and their effect on the aircraft.

A significant weakness in judging the max acceptable crosswind in operation is that humans tend to overestimate their capabilities, and often underestimate risk. Consider when a ‘max’ crosswind was last flown (if at all), how does the aircraft handle in gusty conditions (pitch, speed, power as well as lat/directional) – how did you find out, what is the runway surface condition, what change in landing distance may be required, etc, etc.


http://www.pprune.org/tech-log/40637...nd-limits.html

Crosswind Certification - How does it affect you?

Safety aspects of aircraft operations in crosswind.

A position paper on crosswind operations.

NLR links intermittent / changed.