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  • Effect of pressure difference

    Jeffrey Arulraj

    Jeffrey Arulraj

    @jeffrey-xA7lUP
    Updated: Oct 25, 2024
    Views: 1.2K
    Some people while traveling by an plane Find it difficult to cope up with the change in pressure inside the chamber

    In this scenario the effect of traveling at 1000mph for those people can turn fatal

    Why is this so?
    Why are people not able to withstand Such High gradient of pressure variation ?
    Who can't withstand such variations? (Any physical ailment)
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Replies

  • Ramani Aswath

    Member • Jul 18, 2013

    People with lung or heart problems, who are unable to tolerate heights above 5000 feet above MSL may find it difficult to handle the lower oxygen levels inside a plane, which is maintained at a pressure equivalent to that between 5000 to 7500feet above MSL.
    Most people can handle this. On long flights this helps people quiet and rather drowsy reducing the load on the hostesses.

    A more detailed analysis can be seen here:
    <a href="https://en.wikipedia.org/wiki/Cabin_pressurization" target="_blank" rel="nofollow noopener noreferrer">Cabin Pressurization</a>
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  • Jeffrey Arulraj

    Member • Jul 19, 2013

    Even I am sure about this Sir

    But if the Rate of chnge of pressure is really high That is when the aircraft moves at speed nearly above mach2 as said in the article I had a question only in that condition
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  • Ramani Aswath

    Member • Jul 19, 2013

    Cabin pressure is independently controlled. Are you by any chance considering the physiological aspects of acceleration to reach 2 mach?
    A high acceleration can cause problems for many.
    Originally propeller planes were at ambient pressure. They did have pressure variation problem if they were climbing or descending too fast. Present day turbo props do have pressurized cabins.
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  • Jeffrey Arulraj

    Member • Jul 19, 2013

    <a href="https://www.crazyengineers.com/threads/skylon-space-plane-powered-by-sabre-has-top-speed-of-19-000-mph.69255">Skylon Space Plane Powered By SABRE Has Top Speed Of 19,000 MPH</a>

    Sir this article made me think this

    I am not sure about the effect

    But I heard that the pressurising Takes a little time which is why the ascend is always slower in an aircraft we use now a days

    But this seems not the case with this design
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  • Ramani Aswath

    Member • Jul 19, 2013

    Something does not gel. The cabin is like a closed bottle. What happens outside should not normally affect the inside pressure. The rate of ascent in a commercial aircraft is dictated by fuel economy rather than other considerations.
    Interesting. Let us know if more data comes up.
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