http://www.airliners.net/aviation-forums/g...d.main/4565971/
http://www.flightglobal.com/articles/2009/...on-the-way.html
Wonder if US will opt for the new winglets. Retrofit costs vs fuel saved.
http://www.flightglobal.com/articles/2009/...on-the-way.html
Wonder if US will opt for the new winglets. Retrofit costs vs fuel saved.