The Aeronautical Journal: Volume 81 -

Spray from aircraft undercarriages at high speed—a model investigation
R. V. Barrett
Published online by Cambridge University Press:

04 July 2016, pp. 220-225
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The ability to operate when runways are flooded or slush-covered to some degree, must be demonstrated during the certification programme of any new civil transport aircraft. Failure to meet the requirements laid down will result in operating restrictions which may jeopardise the sales prospects of the aircraft. Most other types of aircraft will also have to operate occasionally in these adverse conditions.
The main problems result from the spray generated at the wheels, and are engine malfunction due to spray ingestion and damage due to its impingement on the airframe. An associated problem is the packing of slush into ducts, flap cavities, undercarriage bays, etc, with the attendant risks of damage to internal systems and jamming of mechanical parts. There is also a large additional drag load on the aircraft, due to the displacement of fluid by wheels and to spray impact on the airframe: this increases roughly in proportion to the depth and effectively limits the slush depth that can be tolerated on the runway. For many aircraft this limit is little more than one centimetre.

Atmospheric turbulence loads on aircraft
J. Taylor
Published online by Cambridge University Press:

04 July 2016, pp. 528-553
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The problem of flying in rough air has been appreciated since aircraft were first produced and I can best lead up to the position from which I intend to start by selecting information from summary documents by Donely in 1950 and Zbrozek in 1964. Philip Donely was a leading figure in the field of atmospheric turbulence loads before the 1939–45 war and probably the one most highly regarded in the world when he gave the keynote address to the Royal Aeronautical Society Conference on Atmospheric Tubulence in 1971. George Zbrozek had been an international authority for many years when he presented his main lecture to the Royal Aeronautical Society in 1964 and but for his untimely death whilst on an international mission might still be a leading figure.

The Aeronautical Journal