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posted by chromas on Wednesday April 04 2018, @10:24AM   Printer-friendly
from the explain dept.

NASA has awarded a contract to create a relatively quiet supersonic jet plane to Lockheed Martin:

Lockheed Martin Aeronautics Company of Palmdale, California, was selected for the Low-Boom Flight Demonstration contract, a cost-plus-incentive-fee contract valued at $247.5 million. Work under the contract began April 2 and runs through Dec. 31, 2021.

Under this contract, Lockheed Martin will complete the design and fabrication of an experimental aircraft, known as an X-plane, which will cruise at 55,000 feet at a speed of about 940 mph and create a sound about as loud as a car door closing, 75 Perceived Level decibel (PLdB), instead of a sonic boom.

NASA plans to fly the "X-plane" over U.S. cities starting in 2022 in order to "collect data about community responses to the flights".

Also at Popular Mechanics, Newsweek, and Wired.

Previously: NASA Quesst Project - Quiet Supersonic Transport
Concorde Without the Cacophony: NASA Thinks It's Cracked Quiet Supersonic Flight
NASA Tests Light, Foldable Plane Wings for Supersonic Flights
Trump Administration Supports NASA's Quieter Supersonic Plane Design


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  • (Score: 3, Funny) by MostCynical on Wednesday April 04 2018, @10:29AM (1 child)

    by MostCynical (2589) on Wednesday April 04 2018, @10:29AM (#662420) Journal

    Number of complaints about noise timed within five minutes of flight
    Number of noise complaints in the times the plane *wasn't* flying

    Number of reported UFO sightings timed within five minutes of flight
    Number of reported UFO sightings in the times the plane *wasn't* flying

    No change from background = success?

    --
    "I guess once you start doubting, there's no end to it." -Batou, Ghost in the Shell: Stand Alone Complex
  • (Score: 2) by nitehawk214 on Wednesday April 04 2018, @01:54PM

    by nitehawk214 (1304) on Wednesday April 04 2018, @01:54PM (#662474)
    --
    "Don't you ever miss the days when you used to be nostalgic?" -Loiosh
  • (Score: 3, Interesting) by bob_super on Wednesday April 04 2018, @07:16PM

    by bob_super (1357) on Wednesday April 04 2018, @07:16PM (#662593)

    Concorde was one of the most beautiful birds to ever fly, but the engines were crazy loud even subsonic (climb out of CDG could be heard like nothing else). Those who saw a B1-B at an air show have a pretty good idea of what I mean.
    Now, airliner engines have gotten a lot quieter, but fighter engines have not (it ain't in the requirements, apparently).

    The main nuisance isn't the sonic boom, even if you live in Gaza.

    How noisy will the engines of a 21st-century civilian supersonic plane be?

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