Airbus and Boeing moving from Winglets to Morphlets
Wired has a nice story on the constant efforts by both Airbus and Boeing to increase fuel savings by their aircraft. The latest technology w...

https://basevida.blogspot.com/2009/03/airbus-and-boeing-moving-from-winglets.html

The latest technology which appears promising is "moving winglets" or "morphlets" whose configuration can be changed in-flight to suit flying conditions to deliver fuel savings. The two airframe makers are taking different approaches to the same goal.
Read the full story here.