Spinners

Discussion in 'Aviation' started by spicmart, May 9, 2013.

  1. spicmart

    spicmart Member

    Joined:
    May 11, 2008
    Messages:
    274
    Likes Received:
    2
    Trophy Points:
    18
    Is there any difference in drag between pointed (allies, japanese) ones and blunt ones (germans).
     
  2. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,205
    Likes Received:
    787
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    To just compare spinners is comparing apples and oranges. You would have to look into how that spinner is designed into the fuselage.
     
  3. spicmart

    spicmart Member

    Joined:
    May 11, 2008
    Messages:
    274
    Likes Received:
    2
    Trophy Points:
    18
    #3 spicmart, May 10, 2013
    Last edited: May 10, 2013
    The Me 109 (from F up) had a very large spinner in diameter. So I guess that a pointed spinner would have been too long.
    They eventually made it blunt.
    As for the Fw 190, its spinner was comparable to the ones of allied aircraft, yet it is more blunt.
    Why is that?
     
  4. tyrodtom

    tyrodtom Well-Known Member

    Joined:
    Sep 6, 2010
    Messages:
    2,484
    Likes Received:
    110
    Trophy Points:
    63
    Occupation:
    auto body repair
    Location:
    pound va
    Most of the Bf109,s had engine mounted cannons, there's no way not to have a blunt spinner when it has to accomindate a cannon muzzle.

    About the only allied aircraft with a really pointed spinner I can think of is the P-40 , maybe P-38's, though i'm sure someone else can think of others.

    I think it was just some designers sense of style.
     
  5. N4521U

    N4521U Well-Known Member

    Joined:
    Nov 1, 2009
    Messages:
    8,633
    Likes Received:
    224
    Trophy Points:
    63
    Occupation:
    reduced to all around slobbing
    Location:
    Miranda, NSW
    Another factor would be method of manufacture.
    Press punched, or spun on a lathe over a wood mold.
    I have a spinner used as a lamp shade mounted to a small AC cylinder, and I believe it was spun.
     
  6. spicmart

    spicmart Member

    Joined:
    May 11, 2008
    Messages:
    274
    Likes Received:
    2
    Trophy Points:
    18
    #6 spicmart, May 10, 2013
    Last edited: May 10, 2013
    One would assume that the pointed spinners if one can call them so are less draggy.
    But I don't know too much about aerodynamics.
     
  7. altsym

    altsym Member

    Joined:
    Nov 27, 2012
    Messages:
    228
    Likes Received:
    1
    Trophy Points:
    18
    Not just cannon consideration, I'm sure wind tunnel tests provided valuable data, as shown here with this prototype 'F' series.
    [​IMG]
     
  8. stona

    stona Well-Known Member

    Joined:
    Mar 28, 2009
    Messages:
    7,532
    Likes Received:
    947
    Trophy Points:
    113
    That's a Bf 109 E-3 in the wind tunnel. Stammkennzeichen WL IGKS (previously D IGKS). Notice also the early position of the swastika across the rudder hinge line.

    Here's an image of the same aircraft at the same establishment showing one of the several "standard" Emil spinners.

    Bf-109E3-WL-IGKS.jpg

    Cheers

    Steve
     
  9. altsym

    altsym Member

    Joined:
    Nov 27, 2012
    Messages:
    228
    Likes Received:
    1
    Trophy Points:
    18
    Yeah 'E' series.. typo on my part, thanks.
     
  10. vikingBerserker

    vikingBerserker Well-Known Member

    Joined:
    Apr 10, 2009
    Messages:
    24,083
    Likes Received:
    655
    Trophy Points:
    113
    Occupation:
    Korporate Kontrolleur
    Location:
    South Carolina
    Ok, you have to post a pic of that!
     
  11. N4521U

    N4521U Well-Known Member

    Joined:
    Nov 1, 2009
    Messages:
    8,633
    Likes Received:
    224
    Trophy Points:
    63
    Occupation:
    reduced to all around slobbing
    Location:
    Miranda, NSW
    It's in a box, dismantled, unfortunately I have nowhere to use it here, or I would.
     
Loading...

Share This Page