This Data Item describes both the origins of@ and how to apply in practical applications@ the empirical model defined in ESDU 10015@ Model for performance of a single aircraft tyre rolling or braking on dry and precipitate contaminated runways@ which is summarised in ESDU 05011@ Summary of the model for performance of an aircraft tyre rolling or braking on dry or precipitate contaminated runways. The model is valid for runways contaminated with water@ slush@ snow and ice but can also be applied to runways that are free from any contaminant. In order to calculate decelerating forces@ in addition to an approximation to the operating slip ratio for the braking system@ it is necessary to know values of eight variables@ all of which are used in customary calculations of aircraft performance. These are ? depth of macro-texture of runway surface ? depth of contaminant (where applicable) ? density of contaminant (where applicable) ? ground speed ? tyre inflation pressure ? normal (to runway) load on tyre ? nominal tyre width nominal tyre diameter. The Data Item serves as an introduction to a series of worked examples which analyse the retarding forces acting on tyres which operate in braked and unbraked states on both dry and contaminated runway surfaces. Additionally@ the problems associated with operating on such surfaces and relevant regulatory requirements are also considered.
ESDU 10002-2013 history
2013ESDU 10002-2013 Introduction to worked examples of tyres rolling or braking on dry or precipitate contaminated runways. Application of ESDU 05011