A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners


Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old January 7th 06, 12:20 AM
bagmaker bagmaker is offline
Senior Member
First recorded activity by AviationBanter: Aug 2005
Location: Melbourne Australia
Posts: 167
Default winglets

OK, I can get the theory (OR can I?) with winglets to reduce wingtip vortices.

Surely the best direction for the tip is DOWN!, I understand this may be difficult for actually making, especially with gliders and groundloops, aesthetics, etc, but can someone explain why they are pointing up?

Consider this..
The HIGH pressure area is UNDER the wing, we want to keep this from migrating to the LOW pressure area ABOVE the wing. Our current wingtip style will restrict the LOW pressure from bleeding sideways (and why would it anyway) yet the majority (?) of our lift is generated from the HIGH pressure BELOW the wing.

This high pressure is what we want to retain and utilise, yet it is still allowed to bleed out sideways. Sure the current shape of wingtip will reduce the vortices caused by the two pressures meeting, and thus the drag, but it wont increase the lift available by retaining the HIGH pressure UNDER the wing, where it is most useful.

I also note the return of the "plate" style winglet on latest jetliners, half above, half below the wingtip, instead of a large winglet.

Enlighten me, O knowledgable ones!


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
LS4 Winglets Sleigh Soaring 2 June 8th 05 01:38 AM
Ventus A 16.6 extensions wanted or 15 meter winglets goneill Soaring 0 January 5th 05 06:27 AM
winglets for LS-1 Brad Soaring 4 October 26th 04 06:11 PM
ASW20L extentions with winglets? goneill Soaring 6 September 17th 04 10:28 PM
Discus Winglets Kevin Neave Soaring 2 October 15th 03 11:35 AM

All times are GMT +1. The time now is 06:43 PM.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright 2004-2024 AviationBanter.
The comments are property of their posters.