tdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 81 Reply 1, posted (1 year 1 month 3 weeks 2 days 12 hours ago) and read 2990 times:
Quoting b767 (Thread starter): Does the 717 have the old DC9-30 wing with minor modifications or is it only similar in sice,but with the MD80/90 airfoil?
I think the MD-80/90 used the same airfoil. They just extended the DC-9 wing with extra sections at the root and tip. It's possible the new sections had a different airfoil but that seems unlikely.
Quoting b767 (Thread starter): How does it compare regarding drag lift ratio with newer designs?
The wing, by itself, is better that most designs that came after it since it doesn't have any interference from a strut/engine and it's got very small (drop hinge) flap fairings. However, the newest stuff (787/A350/747-8) is better.