A & c. An a/c will indeed aquaplane at a speed much lower than V1 if the appropriate conditions exist. An a/c can aquaplane at taxi speed if the brakes are applied too abruptly or the nose wheel turned excessively on a contaminated surface or painted line etc.
DYNAMIC HYDROPLANING is the sliding effect caused by low coefficient of friction from standing water.
VISCOUS HYDROPLANING is the effect at low speeds caused by the lack of tyre penetration of a thin film of water.
REVERTED RUBBER HYDROPLANING causes tyre damage that results from prolonged lack of tyre rotation and friction generated super heated water.
We sometimes do not give wet surfaces the respect they deserve. I am inclined to be extra vigilant when runways/taxiways are wet. They can be a statistic waiting to happen.
[ 01 September 2001: Message edited by: shakespeare ]