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G-LOC
g-force induced loss of consciousness (abbreviated as G-LOC, pronounced "JEE-lock") is a term generally used in aerospace physiology to describe a loss of consciousness occurring from excessive and sustained g-forces draining blood away from the brain causing cerebral hypoxia. The condition is most likely to affect pilots of high performance fighter and aerobatic aircraft or astronauts, but is possible on some extreme amusement park rides. G-LOC incidents have caused fatal accidents in high performance aircraft capable of sustaining high ''g'' for extended periods. High-g training for pilots of high performance aircraft or spacecraft often includes ground training for G-LOC in special centrifuges, with some profiles exposing pilots to 9 ''g''s for a sustained length of time. Effects of ''g''-forces Under increasing positive ''g''-force, blood in the body will tend to move from the head toward the feet. For higher intensity or longer duration, this can manifest progress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G-suit
A g-suit, or anti-''g'' suit, is a flight suit worn by aviators and astronauts who are subject to high levels of acceleration force ( g). It is designed to prevent a black-out and g-LOC (g-induced loss of consciousness) caused by the blood pooling in the lower part of the body when under acceleration, thus depriving the brain of blood. Black-out and g-LOC have caused a number of fatal aircraft accidents. Operation If blood is allowed to pool in the lower areas of the body, the brain will be deprived of blood. This lack of blood flow to the brain first causes a greyout (a dimming of the vision also called brownout), followed by tunnel vision and ultimately complete loss of vision 'blackout' followed by g-induced Loss Of Consciousness or 'g-LOC'. The danger of g-LOC to aircraft pilots is magnified because on relaxation of g-force there is a period of disorientation before full sensation is re-gained. A g-suit does not so much increase the g-threshold, but makes it possible to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firestone Firehawk 600
The Firestone Firehawk 600 was a planned American open-wheel car race scheduled for April 29, 2001 at the Texas Motor Speedway in Fort Worth, Texas, United States. The event was sanctioned by Championship Auto Racing Teams (CART) and was the third round of the 2001 CART season. It was scheduled for 248 laps around the oval track. However, the race was postponed and ultimately canceled due to concerns about driver safety, as the high speeds the cars sustained through the circuit's long corners (which had 24° of banking) could potentially have led to drivers experiencing g-force induced loss of consciousness. It was the only race in CART history that was canceled outright for safety reasons. Kenny Bräck was awarded one point for qualifying on pole position at an average speed of . Background The Firestone Firehawk 600 was to be the second attempt to run an open-wheel race on a high-banked oval. Texas Motor Speedway, which opened in 1997, is classified as an intermediate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypoxia (medical)
Hypoxia is a condition in which the body or a region of the body is deprived of an adequate oxygen supply at the tissue (biology), tissue level. Hypoxia may be classified as either ''Generalized hypoxia, generalized'', affecting the whole body, or ''local'', affecting a region of the body. Although hypoxia is often a pathological condition, variations in arterial oxygen concentrations can be part of the normal physiology, for example, during strenuous physical exercise. Hypoxia differs from hypoxemia and anoxemia, in that hypoxia refers to a state in which oxygen present in a tissue or the whole body is insufficient, whereas hypoxemia and anoxemia refer specifically to states that have low or no Oxygen saturation (medicine), oxygen in the blood. Hypoxia in which there is complete absence of oxygen supply is referred to as anoxia. Hypoxia can be due to external causes, when the breathing gas is hypoxic, or internal causes, such as reduced effectiveness of gas transfer in the lung ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greyout (medical)
A greyout is a transient loss of vision characterized by a perceived dimming of light and color, sometimes accompanied by a loss of peripheral vision. It is a precursor to fainting or a blackout and is caused by hypoxia (low brain oxygen level), often due to a loss of blood pressure. Greyouts have a variety of possible causes: * Shock, such as hypovolemia, even in mild form such as when drawing blood. * Standing up suddenly (see orthostatic hypotension), especially if sick, hungover, or experiencing low blood pressure. * Fatigue * Hyperventilation, paradoxically: self-induced hypocapnia, such as in the fainting game or in shallow water blackout. * Overexertion * Severe episodes of coughing or sneezing * Panic attack Possible symptoms include: * blurred vision * tunnel vision * dizziness * loss of balance * lightheadedness * sudden feeling of exhaustion * breathing accelerates into short quick breaths * respiratory acidosis (“hot breath”) * heart rate sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supine Cockpit
A supine cockpit is where the pilot is in a supine position to reduce blood pooling in the legs and preventing g-LOC in high g environments. This can enable the pilot to handle g-forces. It is the opposite of the Prone pilot. List of supine cockpit aircraft * Aériane Swift * British Aerospace P.125 * Maupin Carbon Dragon * Ruppert Archaeopteryx See also *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 – Acces ... References {{reflist Supine cockpit aircraft Lists of aircraft by design configuration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G-force
The g-force or gravitational force equivalent is a Specific force, mass-specific force (force per unit mass), expressed in Unit of measurement, units of standard gravity (symbol ''g'' or ''g''0, not to be confused with "g", the symbol for grams). It is used for sustained accelerations that cause a perception of weight. For example, an object at rest on Earth's surface is subject to 1 ''g'', equaling the conventional value of gravitational acceleration on Earth, about . More transient acceleration, accompanied with significant jerk (physics), jerk, is called Shock (mechanics), ''shock''. When the g-force is produced by the surface of one object being pushed by the surface of another object, the reaction force to this push produces an equal and opposite force for every unit of each object's mass. The types of forces involved are transmitted through objects by interior Stress (mechanics), mechanical stresses. Gravitational acceleration is one cause of an object's accelera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euthanasia Coaster
The Euthanasia Coaster is a hypothetical steel roller coaster and euthanasia device designed with the sole purpose of killing its passengers. The concept was conceived in 2010 and made into a scale model by Lithuanian artist Julijonas Urbonas, a PhD candidate at the Royal College of Art in London. Urbonas, who had formerly been an amusement park employee, stated that the goal of his concept roller coaster is to take lives "with elegance and euphoria", either for euthanasia or execution purposes. John Allen, who had been the president of the Philadelphia Toboggan Company, inspired Urbonas with his description of the "ultimate" roller coaster as one that "sends out 24 people and they all come back dead". Design The concept design of the layout begins with a steep-angled lift that takes riders up to the top (for comparison, the tallest roller coaster ever built, Kingda Ka, had a top hat that was in height), a climb that would take a few minutes to complete, allowing the passenge ... [...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] |
Aerospace Physiology
Aerospace physiology is the study of the effects of high altitudes on the body, such as different pressures and levels of oxygen. At different altitudes the body may react in different ways, provoking more cardiac output, and producing more erythrocytes. These changes cause more energy waste in the body, causing muscle fatigue, but this varies depending on the level of the altitude. Effects of altitude The physics that affect the body in the sky or in space are different from the ground. For example, barometric pressure is different at different heights. At sea level barometric pressure is 760 mmHg; at 3,048 m above sea level, barometric pressure is 523 mmHg, and at 15,240 m, the barometric pressure is 87 mmHg. As the barometric pressure decreases, atmospheric partial pressure decreases also. This pressure is always below 20% of the total barometric pressure. At sea level, alveolar partial pressure of oxygen is 104 mmHg, reaching 6000 meters above the sea level. This pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Articles Containing Video Clips
Article often refers to: * Article (grammar), a grammatical element used to indicate definiteness or indefiniteness * Article (publishing) An article or piece is a written work published in a Publishing, print or electronic media, electronic medium, for the propagation of news, research results, academic analysis or debate. News A news article discusses current or recent news of e ..., a piece of nonfictional prose that is an independent part of a publication Article(s) may also refer to: Government and law * Elements of treaties of the European Union * Articles of association, the regulations governing a company, used in India, the UK and other countries; called articles of incorporation in the US * Articles of clerkship, the contract accepted to become an articled clerk * Articles of Confederation, the predecessor to the current United States Constitution * Article of impeachment, a formal document and charge used for impeachment in the United States * Article of ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Champ Car
Champ Car World Series (CCWS) was the series sanctioned by Open-Wheel Racing Series Inc., a Governing body, sanctioning body for American open-wheel car racing that operated from 2004 to 2008. It was the successor to Championship Auto Racing Teams (CART), which sanctioned open-wheel racing from 1979 until dissolving after the 2003 season. Vehicles Champ Cars were single-seat, open-wheel racing cars, with Mid-engine design, mid-mounted engines. Champ cars had sculpted undersides to create ground effect in cars, ground effect and prominent wings to create downforce. The cars would use a different aerodynamic kit on the occasions they raced on an oval. With funds low, development was effectively frozen with a focus on developing a universal chassis, and the series generally ran on CART-spec 2002 Lola B02/00, Lola chassis from 2003 to 2006. The new chassis was developed by Panoz and debuted in 2007 as the Panoz DP01. The chassis was well received by drivers and fans. The serie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redout
A redout occurs when the body experiences a negative g-force sufficient to cause a blood flow from the lower parts of the body to the head. It is the inverse effect of a greyout, where blood flows away from the head to the lower parts of the body. Usually, a redout will only ever be experienced by pilots, as planes are the most common devices that allow such negative g-forces to be exerted. Redouts are potentially dangerous and can cause retinal damage and hemorrhagic stroke Stroke is a medical condition in which poor cerebral circulation, blood flow to a part of the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemor .... According to the predominant theory, the redness appearing in the visual field is not caused by an actual blood flow to the eye, but it is most likely caused by the blood-laden lower eyelid coming into the visual field because of the pull of negative-Gs. Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
