CPL Flight Ops

Question 1

Contaminated Runway Defintion

Answer 1

• If 25% of the required length and width is covered in substance
• Can be considered shallow or deep

Question 2

Shallow Contamination Runway

Answer 2

Less than 3 mm depth of water equivalent

Question 3

Canadian Runway Friction Index (CRFI)

Answer 3

Allows pilots to determine whether a contaminated runway is useable for the given conditions

Question 4

Viscous Hydroplaning

Answer 4

• A thin film of water lubricates the tire surface at relatively low speeds
• This can double the required stopping distance

Question 5

Dynamic Hydroplaning

Answer 5

Water with a depth greater than the tread of the tire can create a ridge of water separating the tire and runway surface with enough speed

Question 6

Hydroplaning Speed (Rotating Tire)

Answer 6

• 9 * root(tire pressure)

Question 7

Hydroplaning Speed (Non-Rotating Tire)

Answer 7

• 7.7 * root(tire pressure)

Question 8

Reverted Rubber Hydroplaning

Answer 8

• Occurs when a locked tire skids on a wet or icy runway
• Friction between the tire and pavement causes ribber particles to be shed from the tire