Category: Aviation

G-LOC Demystified

G-LOC has been implicated in various combat aircraft mishaps. Incidence of in-flight G-LOC in India is 11%, while it is 12 and 19% in USAF and RAF, respectively. Interestingly, G-LOC is more likely to occur in a trainee pilot, co-pilot or weapon system operator, who is caught unaware by the sudden onset of G or …

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G-LOC – The Enemy within!

G-LOC is G-induced loss of consciousness, defined as a “state of altered perception wherein one’s awareness of reality is absent as a result of sudden, critical reduction of cerebral circulation caused by increased G force”.

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Air Combat Manoeuvres and +Gz Forces

During air combat manoeuvres* or while practicing basic fighter manoeuvres**, the pilots are exposed to the commonest type of acceleration encountered in aviation – +Gz. Interestingly, the aircraft are capable of pulling higher Gs and sustain it longer than an unprotected human being can tolerate. The effects of +Gz on the circulatory system, and in turn the blood …

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G Force – What is?

‘G’ is the ratio between a given acceleration and the acceleration due to gravity. The term ‘G force’ is used sometimes to describe a force, which produced acceleration, which is a multiple of the acceleration due to gravity (9.81 m/sq sec). Thus, an acceleration of 98.1 m/sq sec would be 10 G. High sustained G, …

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Exhilarating when Accelerating in Air!

A fast jet can move rapidly on ground, taking off into the medium of air where it can be manoeuvered in flight by the aerodynamic forces generated by the thrust of its engine and manoeuvrability by swift-responding control surfaces. Such movements of the aircraft affect its occupants, the aircrew (pilots and weapons system operators) due …

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G-LOC – Then and Now…

16 September 2011. Reno, Nevada saw the tragic crash of a P-51Mustang [1] during the Reno Air Races. The findings of the National Transportation Safety Board suggests that the pilot had lost consciousness due to ‘overwhelming’ G forces [2]. This occurrence in a modified 1940’s vintage aircraft is no surprise, considering its high thrust to …

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There is LASER in my eye!

There is a spurt in the incidence of Laser devices aimed at aircraft during low level flying or while making an approach to land [1, 2]. Despite punitive actions against culprits, including sentence up to 10 years in Germany or 20 years in US, it shows no signs of abating [2, 3, 4]. Those shining …

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Flouting Safety, Stymied DGCA and Bollywood!

A domestic commerical airliner in India has been recently found to have flouted flight safety norms almost four months back. The captain of the aircraft allowed a supernumerary pilot to undertake landing, when that pilot was neither qualified nor authorised for piloting duties! Indian DGCA recommended suspension of the concerned airline’s flight safety officer. The …

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NVG: Why the Neck Pains?

An informal query on a professional forum whether helicopter pilots suffer from neck pain while using NVG (1), a small group chose to share their thoughts and concerns. Eight of the respondents affirmed that they had discomfort or pain, including disc prolapse and pressure on the nerves as reported by one pilot each. However, there …

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Drunken Pilots, Unsafe Lives: Unfolding an Indian Story…

In a mockery to safety of fare paying passengers, couple of aircrew were found drunk while reporting for duty on new year eve. This included one first officer and three non-flying crew, employed by three of the private commercial airline companies in India [1].

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