Editing Wingtip device (section)

===Hoerner wing tips===
[[File:Heinkel He 162 CASM 2012 5 (cropped).jpg|thumb|[[Heinkel He 162A]] with ''Lippisch-Ohren'' wingtip devices]]

Following the end of World War II, Dr. [[Sighard F. Hoerner]] was a pioneer researcher in the field, having written a technical paper published in 1952<ref name="Aerodynamic Shape of the Wing Tips">{{cite journal|url= http://apps.dtic.mil/dtic/tr/fulltext/u2/a800374.pdf |title= Aerodynamic Shape of the Wing Tips |at= Technical Report No. 5752 |author= Hoerner, Dr. Sighard |journal= USAF Technical Reports |date= 1952 |publisher= Engineering Division, Air Materiel Command; Wright-Patterson Air Force Base, Dayton, Ohio; United States Air Force archive |archive-url= https://web.archive.org/web/20130316153354/http://www.dtic.mil/dtic/tr/fulltext/u2/a800374.pdf |url-status= live |archive-date= 2013-03-16 }}</ref> that called for drooped wingtips whose pointed rear tips focused the resulting wingtip vortex away from the upper wing surface. Drooped wingtips are often called "Hoerner tips" in his honor. Gliders and light aircraft have made use of Hoerner tips for many years.<ref name="History of Met-Co-Aire">{{cite web|last=Sakrison|first=David|date=2004|title=A German aerodynamicist, a California character, and a corkscrew|url=http://www.metcoaire.com/technical/tech_mcastory.shtml|url-status=live|archive-url=https://web.archive.org/web/20160322110205/http://www.metcoaire.com/technical/tech_mcastory.shtml|archive-date=March 22, 2016|publisher=Met-Co-Aire}}</ref><ref name="Aerodynamic Shape of the Wing Tips"/>

The earliest-known implementation of a Hoerner-style downward-angled "wingtip device" on a jet aircraft was during World War II.  This was the so-called "Lippisch-Ohren" (Lippisch-ears), allegedly attributed to the [[Messerschmitt Me 163]]'s designer [[Alexander Lippisch]], and first added to the M3 and M4 third and fourth prototypes of the [[Heinkel He 162]]A ''Spatz'' jet [[light fighter]] for evaluation.  This addition was done in order to counteract the [[dutch roll]] characteristic present in the original He 162 design, related to its wings having a marked [[Dihedral (aeronautics)|dihedral angle]].  This became a standard feature of the approximately 320 completed He 162A jet fighters built, with hundreds more He 162A airframes going unfinished by [[V-E Day]].<ref>{{cite book|last1=Creek|first1=J. Richard|url=http://www.scribd.com/doc/111359285/Aircraft-Profile-No-203-The-Heinkel-He-162|title=The Heinkel He 162 (Aircraft in Profile number 203)|last2=Conway|first2=William|date=1972|publisher=Profile Publications Ltd|location=Leatherhead, Surrey UK|pages=5|access-date=June 18, 2014|orig-year=1967|archive-date=August 19, 2013|archive-url=https://web.archive.org/web/20130819080135/http://www.scribd.com/doc/111359285/Aircraft-Profile-No-203-The-Heinkel-He-162|url-status=dead}}</ref>