|
Core Lock
Core lock is a type of turbine engine failure that can occur during flight. When an engine is shut down in the air, some components cool faster than others due to the engine's design. Because materials expand and contract at different rates as temperatures change, this uneven cooling can cause parts of the engine to seize. If the dimensional changes are severe enough, critical components may become jammed, reducing or completely preventing rotation. Core lock makes it difficult for pilots to perform either a windmill restart or an APU-assisted engine restart. Once the engine is allowed to cool uniformly, the components gradually return to their normal dimensions, resolving the core lock condition. Pinnacle Airlines Flight 3701 Core lock was cited as one of the contributing causes to the October 2004 Pinnacle Airlines Flight 3701 accident, noting that the primary cause, the pilots' "unprofessional ... deviation from standard operating procedures," causing both engines to sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbine Engine Failure
A turbine engine failure occurs when a gas turbine engine unexpectedly stops producing power due to a malfunction other than fuel exhaustion. It often applies for aircraft, but other turbine engines can also fail, such as ground-based turbines used in power plants or combined diesel and gas vessels and vehicles. Reliability Turbine engines in use on today's turbine-powered aircraft are very reliable. Engines operate efficiently with regularly scheduled inspections and maintenance. These units can have lives ranging in the tens of thousands of hours of operation. However, engine malfunctions or failures occasionally occur that require an engine to be shut down in flight. Since multi-engine airplanes are designed to fly with one engine inoperative and flight crews are trained for that situation, the in-flight shutdown of an engine typically does not constitute a serious safety of flight issue. The Federal Aviation Administration (FAA) was quoted as stating turbine engines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windmill Restart
A windmill is a machine operated by the force of wind acting on vanes or sails to mill grain (gristmills), pump water, generate electricity, or drive other machinery. Windmills were used throughout the high medieval and early modern periods; the horizontal or panemone windmill first appeared in Persia during the 9th century, and the vertical windmill first appeared in northwestern Europe in the 12th century. Regarded as an icon of Dutch culture, there are approximately 1,000 windmills in the Netherlands today. Forerunners Wind-powered machines have been known earlier, the Babylonian emperor Hammurabi had used wind mill power for his irrigation project in Mesopotamia in the 17th century BC. Later, Hero of Alexandria (Heron) in first-century Roman Egypt described what appears to be a wind-driven wheel to power a machine.Dietrich Lohrmann, "Von der östlichen zur westlichen Windmühle", ''Archiv für Kulturgeschichte'', Vol. 77, Issue 1 (1995), pp. 1–30 (10f.) A. G. Dra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auxiliary Power Unit
An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115 V AC voltage at 400 Hz (rather than 50/60 Hz in mains supply), to run the electrical systems of the aircraft; others can produce 28 V DC voltage. APUs can provide power through single or three-phase systems. A jet fuel starter (JFS) is a similar device to an APU but directly linked to the main engine and started by an onboard compressed air bottle. Transport aircraft History During World War I, the British Coastal class blimps, one of several types of airship operated by the Royal Navy, carried a ABC auxiliary engine. These powered a generator for the craft's radio transmitter and, in an emergency, could power an auxiliary air blower. One of the first military fixed-wing aircraft to use an APU was the British, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinnacle Airlines Flight 3701
On October 14, 2004, Pinnacle Airlines Flight 3701 crashed near Jefferson City, Missouri while flying from Little Rock National Airport to Minneapolis–Saint Paul International Airport. The two pilots, the only occupants, were killed. Federal investigators determined the crash was due to the pilots' unprofessional behavior and disregard for training and procedures. Aircraft and crew Pinnacle Airlines Flight 3701, operating under the Northwest Airlink banner, was a repositioning flight of an empty 50-seat Bombardier CRJ200 (aircraft registration ). The aircraft was built in 2000. It had accumulated 10,168 hours of flight time and completed 9,613 flight cycles at the time of the crash. On October 14, 2004, a different Pinnacle Airlines flight crew was scheduled to fly the incident aircraft from Little Rock National Airport to Minneapolis–Saint Paul International Airport, but this crew received an error message and aborted their takeoff. Pinnacle Airlines dispatched maint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Index Of Aviation Articles
Aviation is the design, development, production, operation, and use of aircraft, especially heavier-than-air aircraft. Articles related to aviation include: A Aviation accidents and incidents – Above Mean Sea Level (AMSL) – ADF – Accessory drive – Advance airfield – Advanced air mobility – Advanced technology engine – Adverse yaw – Aerial ramming – Aerial reconnaissance – Aerobatics – Aerodrome – Aerodrome mapping database (AMDB) – Aerodynamics – Aerofoil – Aerodrome beacon – Aeronautical Information Manual (AIM) – Aeronautical chart – Aeronautical Message Handling System – Aeronautical phraseology – Aeronautics – Aeronaval – Aerospace – Aerospace engineering – Afterburner – Agile Combat Employment (ACE) – Aileron – Air charter – Air defense identification zone (ADIZ) – Air freight terminal – Air traffic flow management – Air-augmented rocket – Airband – Airbase (AFB) – Airborne colli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviation Risks
Aviation includes the activities surrounding mechanical flight and the aircraft industry. ''Aircraft'' include fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air aircraft such as hot air balloons and airships. Aviation began in the 18th century with the development of the hot air balloon, an apparatus capable of atmospheric displacement through buoyancy. Clément Ader built the "Ader Éole" in France and made an uncontrolled, powered hop in 1890. This was the first powered aircraft, although it did not achieve controlled flight. Some of the most significant advancements in aviation technology came with the controlled gliding flying of Otto Lilienthal in 1896. A major leap followed with the construction of the ''Wright Flyer'', the first powered airplane by the Wright brothers in the early 1900s. Since that time, aviation has been technologically revolutionized by the introduction of the jet engine which enabled aviation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
