Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Why do gliders have long, narrow wings?

Ham SammichesHam Sammiches Club Members Posts: 17
Why do gliders usually have a long wingspan with a short wing chord? I would think that the long wing span would create more drag than a shorter, wider wing with the same surface area.

I figure I am most likely wrong but can someone tell me why?



I am building my first airplane which is a motor glider and I think I am going to change the wings and give them some dihedral but I am trying to figure out what would work best as far as wing span and wing chord. right now I have a 60" WS and 7" chord with 2" ailerons.

Thanks!

Comments

  • keel1keel1 Club Members Posts: 307
    Gliders use this design which is known as a high aspect ratio wing.

    In short it creates more lift and less drag which is ideal for gliding.

    Where as military aircraft such as fighter jets have low aspect ratio wings , which are short and wide and are suited for fast manoeuvrable turns which they do well.

    image
  • keel1keel1 Club Members Posts: 307
    Check out this link it may help with your build it is a Super Dimona.

    A motor glider ,quite modern.

    Good luck image

    http://www.diamond-air.at/hk36_super_dimona+M52087573ab0.html
  • Ham SammichesHam Sammiches Club Members Posts: 17
    Ok, thanks. Very helpful!



    How would a 60" wingspan and 7" chord compare to a 70" wingspan and 5" chord with polyhedral as far as lift?
  • SootySooty Christchurch NZClub Members Posts: 6,110 ✭✭✭
    Cost wise it would probably mean the difference between a hatch-back car and a V8 Range Rover for transport purposes. image
  • mpjf01mpjf01 Club Members Posts: 1,009 ✭✭
    Cost wise it would probably mean the difference between a hatch-back car and a V8 Range Rover for transport purposes. image


    He's from the US.



    Look at (feathered) birds. Those specialising in gliding have large wingspans and most often high aspect ratio wings. Those that flap about a lot usually have short stubby wings.



Leave a Comment

BoldItalicStrikethroughOrdered listUnordered list
Emoji
Image
Align leftAlign centerAlign rightToggle HTML viewToggle full pageToggle lights
Drop image/file