Talk:Rolls-Royce Olympus

From Wikipedia, the free encyclopedia

	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.	Aviation Portal
Start	This article has been rated as Start-Class on the quality scale.
Additional information and associated projects or task forces: This article has been checked against the following criteria for B-Class status: Referencing and citation: not checked Coverage and accuracy: not checked Structure: not checked Grammar: not checked Supporting materials: not checked To fill out this checklist, please add the following to the template call: <!-- B-Class-1. It is suitably referenced, and all major points have appropriate inline citations. --> |B-Class-1=yes/no <!-- B-Class-2. It reasonably covers the topic, and does not contain obvious omissions or inaccuracies. --> |B-Class-2=yes/no <!-- B-Class-3. It has a defined structure, including a lead section and one or more sections of content. --> |B-Class-3=yes/no <!-- B-Class-4. It is free from major grammatical errors. --> |B-Class-4=yes/no <!-- B-Class-5. It contains appropriate supporting materials, such as an infobox, images, or diagrams. --> |B-Class-5=yes/no Aircraft WikiProject

The description of the variable area exhaust nozzle is wrong wrt the Olympus. On this engine the nozzle comprises a series of 'petals', interlinked and surrounded by a ring. The ring contacts the petals by a series of rollers running on shaped (curved) tracks such that as the ring translates forward and backward the petals are forced closer together or allowed to open out under the exhaust flow. When the engine is running 'dry' the nozzle is at its smallest area. When reheat is selected the nozzle opens to maintain the correct pressure ratios throughout the engine. The nozzle area is infinitely variable within the confines of the range of movement of the petals and is scheduled automatically dependent upon a combination of fuel and air flow as well as the pressure ratios within the engine. The 'eyelids' mentioned in the article are in fact thrust reverse 'buckets' that are extended in the exhaust stream on landing to slow the aircraft down. It should be noted tht safety systems prevent the deployment of the buckets in flight and when reheat is selected. Kitbag 23:13, 16 May 2007 (UTC)