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A cowling is the removable covering of a vehicle's engine, most often found on automobiles, motorcycles, airplanes, and on outboard boat motors. On airplanes, cowlings are used to reduce drag and to cool the engine.
The National Transportation Safety Board (NTSB) determines that the probable cause of this accident was a low-cycle fatigue crack in the dovetail of fan blade No. 13, which resulted in the fan blade separating in flight and impacting the engine fan case at a location that was critical to the structural integrity and performance of the fan cowl ...
A turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion.The word "turbofan" is a combination of references to the preceding generation engine technology of the turbojet and the additional fan stage.
An engine cowling on a Southwest Airlines Boeing 737-800 fell off on Sunday during takeoff in Denver and struck the wing flap, prompting the Federal Aviation Administration to open an investigation.
The carbon fiber composite fan cowl can contain a separated fan blade. GE provides the whole nacelle including the thrust reverser. [2] Developed with Safran, the slimline nacelle with clam-shell cowl openings reduce weight and drag. [13] Its TSFC is 8% lower than the competing BR725 of the Gulfstream 650, and over 10% better than the BR710. [2]
Depending on the airflow characteristics of the engine, it may be desirable to lower the ramp angle or move the cone rearwards to refocus the shockwaves onto the cowl lip to maximise intake airflow. c) are designed to have a normal shock in the ducting downstream of intake lip, so that the flow at compressor/fan entry is always subsonic.
The inlet cowl, fan cowl doors, and thrust reversers will be examined further by NTSB investigators to map damage and cowl failure patterns after the fan blade failure, and to examine the subsequent progression of fire in the thrust reversers. [24] Damage to the wing and the body fairing of United Airlines flight 328 (NTSB photo)
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