Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 5 of 5

  1. #1

    Join Date
    Jan 2003
    Location
    Plains, GA
    Posts
    417
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    tapered swept wings vs constant chord wings?

    What is the major difference in the way a constant chord wing flys compared to a tapered swept wing.

    For example a 60x12 inch wing constant chord vs a 60 x 16 inch root / 8 inch tip chord with 2 inches of sweep

    Spar height 1.5 inches constant on the 60x12 and spar height 2 inches at the 16 inch root tapering down to 1 inch at the 8 inch tip chord on the swept wing.

    Does a swept tapered wing give a plane better aerobatic performance? will the swept wing tip stall easier?

    Is it really that much of a difference in the way they fly?

  2. #2

    Join Date
    Jun 2002
    Location
    Palmdale, CA
    Posts
    5,209
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: tapered swept wings vs constant chord wings?

    For specific purposes, each wing is "best".. no one wing is best for all jobs.
    Sweeping adds lateral stabilty without dihedral.
    It permits a further aft c.g., relative to a straight wing, which can alleviate nose weight due to tail weight.
    Sparky Paul
    http://www.angelfire.com/indie/aerostuff

  3. #3

    Join Date
    Oct 2002
    Location
    Austin, TX
    Posts
    4,060
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: tapered swept wings vs constant chord wings?

    Flying Control Line Stunt airplanes, one sees that constant chord airplanes bounce and wiggle around in the wind noticeably more than similar airplanes with tapered wings.

    Jim

  4. #4

    Join Date
    Apr 2002
    Location
    Laurel, MD,
    Posts
    4,987
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: tapered swept wings vs constant chord wings?

    From flying combat, where we spend a lot of time right on the edge of stall, but generally try to avoid stalling (ie, no 3D, snapping is a bad thing, etc), constant chord wings generally seem to have a softer stall, a slower snaproll, and recover from the stall faster. But you give up roll rate, speed (in theory), and the structure is heavier.

    I use a constant chord wing in SSC class, where the planes are slow, light, and power-limited, but tapered wings in other classes, where I can power out of trouble.

    All depends on what you want your plane to do.
    Kirk Montague Adams
    Free State Aeromodelers, Laurel, MD : http://freestateaeromodelers.org

  5. #5
    Jimmbbo's Avatar
    Join Date
    Oct 2003
    Location
    Fresno, CA
    Posts
    1,180
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: tapered swept wings vs constant chord wings?

    Among other things, the stall angle of attack depends on the size of the airfoil.

    In a tapered wing, the tip airfoil is smaller than the root, which allows the tip to stall at a lower AOA. Tapered wings usually have a bit of washout (tip chord line is "twisted" leading edge down relative to the root chord) the at the tip to correct for this.

    Cheers!

    Jim
    Have you flogged your crew today?


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 08:02 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.