Jump to content
Sign in to follow this  
Guest bjjones

winglets question

Recommended Posts

Guest delsimflyer

Almost all modern jets (especially long range) have winglets attached to their wingtips. It came to me as a surprise that the best longrange plane b777, be it the -200 or -300 dont use winglets.anyone knows why? shouldnt the performance always increase if vortex formation at the wingtips is discouraged?

Share this post


Link to post
Guest j-mo

The 777 uses raked wingtips instead of winglets.

Share this post


Link to post
Guest

There are several ways to achieve the same (or similar) effects as those achieved by winglets (as is already apparent from the different shapes winglets themselves come in).The 777 uses a different system which is more efficient for the overall design of its wing.

Share this post


Link to post
Guest delsimflyer

>The 777 uses raked wingtips instead of winglets.where can I learn about these in detail? any links?

Share this post


Link to post

D. Scobie, feelThere support forum moderator: https://forum.simflight.com/forum/169-feelthere-support-forums/

Share this post


Link to post
Guest bstolle

The standard 777-200 and the IGW don't have raked wingtips at all.(Btw, the raked wingtips have been invented by McDonnell Douglas engineers)Raked wingtips, winglets and sometimes even tiptanks are aerodynamic crutches.The ideal form would be a 'basic' wing with a very small tip chord to keep the vortex as small as possible (like a glider wing).The 777 has already a high taper ratio.'Theoretically' the wingspan should be even bigger. (again a glider wing) That's the reason why Boeing initially offered the 777 with folding wingtips.RegardsBernt Capt 767

Share this post


Link to post
Guest zzmikezz

Bernt,There was a period when Russian aeronautical engineers favored flow fences to achieve the same goal as winglets -- block spanwise airflow. Do you know why this strategy was abandoned?

Share this post


Link to post
Guest bstolle

Mike,Winglets have very little to do in preventing span wise flow, it

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
×
×
  • Create New...