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Thread: Breaking sound barrier

  1. #1
    Passenger bimmerland's Avatar
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    Breaking sound barrier

    AT 12:11 am this morning a Lufthansa A380 (lh441) (iah - fra) was flying at 725mph at an altitude of 37000 feet. Was it exceeding mach 1. It was over the Atlantic Ocean at the time.

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  2. #2
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    About 30mph short for mach1..

    768mph
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    Passenger bimmerland's Avatar
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    I though 768 was at ground level according to what I've read. Doesn't it reduce at altitude increases?

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    The reported speed from ADSB is relative ground speed.
    https://www.faa.gov/nextgen/programs/adsb/faq/

    ADS-B does not report vertical or horizontal airspeed. Instead, ADS-B reports horizontal and vertical velocity relative to the Earth. This velocity is useful for air traffic control functions and ADS-B applications. Airspeed can be provided by other aircraft sensors.
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    Thanks. .944 mach is pretty impressive for such a huge aircraft.

  6. #6
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    So I believe, no matter the alt. unless that ticks over and the plane gets super stressed by a sonic boom. It'd have been close. But not breaking.
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