Boeing has, at long last, revealed some details about the 737 MAX, most of which have long been talked about in various media. Boeing is further testing new wingtip designs–with or without winglets? And while readers cite this articlein our previous post linking AirInsight about winglets in an effort to discredit the conclusions, the last paragraph is noteworthy:
For the forward-fit market, LaMoria sees a “very healthy” business for Boeing 737s for the “next 5-6 years”, but there is no guarantee the company will select APB blended winglets for the GE Leap-1B-powered 737 Max, set for entry into service 2017. “We have a lot of long-lead future-oriented plans in place in hopes of working with Boeing for many years to come,” says LaMoria. “But Max is still an open question.”
Separately, see this Aeroturbopower article.