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direct-drive propfan

Propfan — NASA / GE Unducted Fan A propfan was first defined as a small diameter, highly loaded multiple bladed variable pitch propulsor having swept blades with thin advanced airfoil sections, integrated with a nacelle contoured to retard the airflow… … Wikipedia
Turbofan — [ CFM56 3 turbofan, lower half, side view.] A turbofan is a type of jet engine, similar to a turbojet. It essentially consists of a ducted fan with a smaller diameter turbojet engine mounted behind it that powers the fan. Part of the airstream… … Wikipedia
Aircraft — An aircraft is a vehicle which is able to fly through the Earth s atmosphere or through any other atmosphere. Rocket vehicles are not aircraft if they are not supported by the surrounding air. All the human activity which surrounds aircraft is… … Wikipedia
Rolls-Royce Merlin — Merlin The Rolls Royce Merlin … Wikipedia
Flight data recorder — An example of a flight data recorder; the underwater locator beacon is the small cylinder on the far right. (English translation of warning message: FLIGHT RECORDER DO NOT OPEN) … Wikipedia
Supermarine Spitfire variants: specifications, performance and armament — Spitfire Role Fighter Manufacturer Supermarine Designer R. J. Mitchell First flight 5 March 1936 Introduction 1938 Retired 1955, RAF Primary user Royal Air Force … Wikipedia