Contaminated Runways Flashcards
What is the definition of a contaminated runway?
Runway 25% covered with 3mm of precipitation.
Is a wet runway a contaminated runway?
No.
What would be used to indicate there is a contaminated runway?
Snow / flooded / water patches ect
What type of runway is reflective?
Wet runway.
What is the definition for a damp runway?
Non reflective - non contaminated.
On a wet runway, what happens to TOD?
No change.
On a contaminated runway, what happens to TOD?
Increases
What happens to TOD on a contaminated compacted snow runway ?
No change.
What are the two types of drag due to contamination?
Spray impingement drag and displacement drag.
What is the value of a good breaking coefficient?
> 0.4
What landing technique would you use in colder weather?
Hard landing.
When does viscous hydroplaning occur?
On a dirty runway.
What is reverted rubber hydroplaning?
If the tyres lock up post skid.
What is dynamic hydroplaning?
The tyres ride a layer of water.
What is the equation for spin down hydroplaning speed (Vp)?
9 x square root of tyre pressure
