This Data Item describes both the origins of, and how to apply in practical applications, the empirical models 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 and ESDU 13007, Side-force coefficients on aircraft tyres in yawed and unbraked motion on dry and wet pavements. <\/p>\n
The model for a tyre in linear motion 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 nine variables, all of which are used in customary calculations of aircraft performance. These are <\/p>\n
\u2022 depth of macro-texture of runway surface <\/p>\n
\u2022 depth of contaminant (where applicable) <\/p>\n
\u2022 density of contaminant (where applicable) <\/p>\n
\u2022 ground speed <\/p>\n
\u2022 tyre inflation pressure <\/p>\n
\u2022 normal (to runway) load on tyre <\/p>\n
\u2022 nominal tyre width <\/p>\n
\u2022 nominal tyre diameter <\/p>\n
\u2022 runway surface temperature. <\/p>\n
For a tyre in yaw, the yaw angle is also required. <\/p>\n
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.<\/p>\n","protected":false},"excerpt":{"rendered":"
Introduction to Worked Examples of Tires Rolling or Braking on Dry or Precipitate Contaminated Runways. Application of ESDU 05011 and ESDU 13007<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n ESDU<\/b><\/a><\/td>\n 2015-09<\/td>\n 14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":557461,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2675],"product_tag":[],"class_list":{"0":"post-557454","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-esdu","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/557454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/557461"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=557454"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=557454"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=557454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}