Futuristic biplane design eliminates sonic boom

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by Grelly, Mar 19, 2012.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Mar 19, 2012 #1

    Grelly

    Grelly

    Grelly

    Well-Known Member

    Joined:
    Aug 27, 2010
    Messages:
    247
    Likes Received:
    30
    Location:
    Surrey, UK
  2. Mar 19, 2012 #2

    Jay Kempf

    Jay Kempf

    Jay Kempf

    Well-Known Member

    Joined:
    Apr 13, 2009
    Messages:
    3,635
    Likes Received:
    913
    Location:
    Warren, VT USA
    What happens when you trap the compressibility pressure wave inside a structure?
     
  3. Mar 19, 2012 #3

    bmcj

    bmcj

    bmcj

    Well-Known Member HBA Supporter

    Joined:
    Apr 10, 2007
    Messages:
    12,833
    Likes Received:
    4,796
    Location:
    Fresno, California
    It'll be not much different than being in the indoor music hall during a heavy metal concert. :gig:

    ...or, inject fuel and you get a scramjet.
     
  4. Mar 19, 2012 #4

    delta

    delta

    delta

    Well-Known Member

    Joined:
    May 27, 2011
    Messages:
    1,896
    Likes Received:
    187
    Location:
    Brookside Utah
    With as much drag as that thing looks to have, that's the only way it'll go supersonic.
     
  5. Mar 19, 2012 #5

    Starman

    Starman

    Starman

    Well-Known Member

    Joined:
    May 17, 2009
    Messages:
    2,011
    Likes Received:
    61
    Location:
    High in the Andes Mountains
    From my studies of catamaran design theory I would say that if the inner surfaces of both wings are flat that it could eliminate a sonic boom from the wings, but only at one particular speed.

    Maybe the inner surfaces don't need to be flat, and it wouldn't work at close range anyway because of the leading edge shock, could work at altitude though, where the leading and trailing edge shock waves meet.
     
  6. Mar 21, 2012 #6

    Aircar

    Aircar

    Aircar

    Banned

    Joined:
    Feb 20, 2010
    Messages:
    3,567
    Likes Received:
    367
    Location:
    Melbourne Australia
    The XB 70 used drooping wing tips to trap the shock wave and boost supersonic lift drag -the Busemann biplane is an old concept first revealed (along with the concept of swept wings for supersonic flight) at a conference in Rome in the 30s but overlooked entirely until rediscovered by the German designers late in ww2 --another example of neglected research that was subsequently revolutionary . The idea of an aerospike ahead of the aircraft is also being retried now.
     
  7. Mar 22, 2012 #7

    DaveK

    DaveK

    DaveK

    Well-Known Member

    Joined:
    Apr 22, 2007
    Messages:
    336
    Likes Received:
    13
    Location:
    Northern California
    I would think with some movable surfaces on the leading and trailing edge they could up the subsonic lift to drag ratio.
     
  8. Mar 22, 2012 #8

    cdrmuetzel@juno.com

    cdrmuetzel@juno.com

    cdrmuetzel@juno.com

    Member

    Joined:
    Mar 10, 2012
    Messages:
    17
    Likes Received:
    2
    Location:
    no entry

Share This Page

arrow_white