B52 Posted May 20, 2017 Share Posted May 20, 2017 (edited) Is the winglets airfoil when looking from the top similar to a conventional rudder symmetric airfoil? If so is the wing ends upward curve (A350) airfoil a transition from a lifting airfoil to a symmetric rudder type ? What is the rudders airfoil like on a cosy or eze ? I would think it to be pressure neutral avoiding any single sided pressure. Any advice input appreciated. Edited May 20, 2017 by B52 Quote Link to comment Share on other sites More sharing options...
TMann Posted May 20, 2017 Share Posted May 20, 2017 The winglet airfoil is the same as the wing airfoil generating lift laterally. The rudder act as a flap thus changing the chord (the straight line from the leading edge to the trailing edge) resulting in a increase in the angle of attack. It is not a symmetrical airfoil. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
B52 Posted May 21, 2017 Author Share Posted May 21, 2017 In that case wouldn't it generate side pressure and add stress to the wing structure in particular aircraft where the winglets function is to reduce drag (A350) ? Quote Link to comment Share on other sites More sharing options...
Voidhawk9 Posted May 21, 2017 Share Posted May 21, 2017 No, all winglets have camber. The lift vector is tilted forward due to the way the air circulates at the tip, thus creating thrust. Quote Aerocanard (modified) SN:ACPB-0226 (Chapter 8) Canardspeed.com (my build log and more; usually lags behind actual progress)Flight simulator (X-plane) flight model master: X-Aerodynamics (GMT+12) Link to comment Share on other sites More sharing options...
B52 Posted May 21, 2017 Author Share Posted May 21, 2017 Wayne's Hicks post explains it all.. Thanks.. http://www.canardzone.com/forum/topic/17266-winglet-airfoil/?p=13768 Quote Link to comment Share on other sites More sharing options...
macleodm3 Posted May 21, 2017 Share Posted May 21, 2017 (edited) I attached my Cozy winglets to my wings this past year... there are many many layers of glass in the attachment... I can't remember exactly, but its like 30 or 40 plies of glass.... lots of forces happening with those winglets. The winglet airfoil is kinda like this.... The upper winglet airfoil is like you folded the end of the wing up at a 90. The lower winglet airfoil is like you folded the end of the wing down at a 90. More or less, for our EZ's anyway. Edited May 21, 2017 by Andrew Anunson Quote Andrew Anunson I work underground and I play in the sky... no problem Link to comment Share on other sites More sharing options...
B52 Posted May 22, 2017 Author Share Posted May 22, 2017 Would the added structural support of the Ez and Cosy winglets needed because of their rudder function..? How about winglets without rudder functions? Quote Link to comment Share on other sites More sharing options...
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