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New flexible wingflaps can cut plane landing and takeoff noise by 30%

Discussion in 'General Topics' started by RDoug, Oct 12, 2017.

  1. RDoug

    RDoug Well-Known Member

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  2. mshunter

    mshunter Well-Known Member

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    What's all the flap about with wind noise?

    Don't the engines make the loudest noise?
     
  3. Soku39

    Soku39 Well-Known Member

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    Any two masses of air with different qualities meeting each other create noise.
     
    Last edited: Oct 12, 2017
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  4. Kingairer

    Kingairer Well-Known Member

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    Why would I want to do a thing like that?
     
  5. tcco94

    tcco94 Professional GTA V Pilot

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    I thought passengers enjoyed the sound blasting for takeoff....no??
     
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  6. srn121

    srn121 Well-Known Member

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    Depends on the passenger as I'm sure some are on their second or third flight of the day and might be trying to nod off if they haven't already. The less noise the plane makes the less restrictions communities will likely put on nearby airports and it'll be less difficult to expand current airports or build new airports with less whiney locals bitching about noise.

    It also sounds like it has some promise for improving fuel economy which is pretty interesting. I know some planes have a 'negative' or reflexed flap setting to decrease drag in cruise. I believe some Pipistrels use it, but I'm not sure if there's much of an application for commercial airliners.
     
  7. alaskadrifter

    alaskadrifter Noob

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    I wonder how it affects performance.
     
  8. U_of_I_Tweak

    U_of_I_Tweak Well-Known Member

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    Maules have a negative flap setting for cruise.

    I'm not sure it makes the plane fly any better though...

    Sent from my XT1585 using Tapatalk
     
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  9. Cessnaflyer

    Cessnaflyer Wooooooooooooooooooooooooooooooo

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    I know this is probably sarcastic, but I live under the approach path for the airport they are testing the MRJ. A few months ago they were doing tests for flap flutter at insanely fast airspeeds. I actually thought it was a flight of F-18's that occasionally visit doing a highspeed pass. Most of the noise was airframe noise.
     
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  10. Fireflights

    Fireflights Corporate "Baggage Tetris" Master

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    It didn’t do anything for making the flying characteristics “better”, but it does give a little more speed.
    At best you may get 5-7 knots in cruise. We called it the hyperspace setting.
     
  11. ArcherII

    ArcherII Well-Known Member

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    That GLF has been thru a lot.

    It should see someone. Schizophrenic as hell.
     
  12. Boris Badenov

    Boris Badenov He comes to save the day in a broken truck.

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    I do find the notion of testing quiet flaps on a straight-pipe Gulfstream fairly hilarious. "THE DECIBEL METER CONFIRMS OUR HYPOTHESIS, SIR!" "WHAT????"
     
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  13. Screaming_Emu

    Screaming_Emu You people

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    Yeah. I doubt he’s being sarcastic. :p
     
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  14. knot4u

    knot4u Repeat Offender

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    Spey engines are like radials, if there isn't at least a few drops of oil under them someone needs to check if there's any oil in it. Changing those engines isn't particularly difficult but it is one of dirtiest jobs on an old Gulfstream. Carbon from the generator brushes mixes with turbine oil and gets everywhere, and you have to take everywhere apart.
     
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  15. Cptnchia

    Cptnchia Well-Known Member

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    Just like a JT8D
     

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