This article is within the scope of the Aviation WikiProject. If you would like to participate, please visit the project page, where you can join the project and see lists of open tasks and task forces. To use this banner, please see the full instructions.AviationWikipedia:WikiProject AviationTemplate:WikiProject Aviationaviation articles
This article has not yet been checked against the criteria for B-class status:
Referencing and citation: not checked
Coverage and accuracy: not checked
Structure: not checked
Grammar and style: not checked
Supporting materials: not checked
To fill out this checklist, please add the following code to the template call:
This article was reviewed by member(s) of WikiProject Articles for creation. The project works to allow users to contribute quality articles and media files to the encyclopedia and track their progress as they are developed. To participate, please visit the project page for more information.Articles for creationWikipedia:WikiProject Articles for creationTemplate:WikiProject Articles for creationAfC articles
This article was accepted on 18 September 2007 by reviewer Hirohisat (talk·contribs).
This article could really benefit from a high-level introduction, and possibly a sentence along the lines of "during normal flight, the engine warms up and the turbine casing expands, creating a small (XYZ mm) gap between the casing and the tips of the spinning compressor blades. Air leaking around, past the edge of the blades without passing through them reduces engine and fuel efficiency. One approach to reduce the gap is by cooling the turbine casing uses a stream of cold air. This cool air can be supplied by taking it from the by-pass valve, as found on the EJ200 and FOO and BAR engines." Although this is only my guess and it would be preferable if such an improvement could be written by somebody familiar with the topic who can fill in the correct details! —Sladen (talk) 04:17, 24 October 2008 (UTC)[reply]
