Undoubtedly cabin pressurisation and oxygen systems have allowed unhindered aviation activities, with a caveat though – never to cross the altitude beyond the capabilities of the system on board. Thus, commercial aircraft fly maintaining a cabin pressure of 6000-8000 ft, and unpressurised small aircraft mostly operate below 10000 ft. Combat aircraft may have a higher …
The most important effects of hypoxia is on Central Nervous System (CNS) and vision. This insult to CNS which affects the performance in flight varies as per the altitude and the resulting stages of hypoxia. The effects are discussed as per the stages of hypoxia.
Henri Pequet (1) flew the first official flight in India in Sommer (2) biplane, powered by 50 hp Gnôme engine, on 18 Feb 1911. This is the also the first recorded airmail flight (3). Pequet carried more than 6000 pieces of mail over a distance of 6 miles from Allahabad to Naini in Northern India.