WILCO737 From Greenland, joined Jun 2004, 9118 posts, RR: 76
Reply 1, posted (5 years 8 months 2 weeks 6 days 20 hours ago) and read 4643 times:
AIRLINERS.NET CREW HEAD MODERATOR
Quoting Fghtngsiouxatc (Thread starter): I know it's an odd question, but was there a change from the old MD-11s to the new one? I ask because I wonder if there were any other small changes like this to newer models.
Yes, it is quiter when the are upwards between the two windows. Les drag as well A minor change with great effect.
AA737-823 From United States of America, joined Mar 2000, 5947 posts, RR: 11
Reply 7, posted (5 years 8 months 2 weeks 7 hours ago) and read 3657 times:
The MD-11 underwent a great number of tweaks throughout it's life cycle, and by that I'm referring to the period that the aircraft was actually available for order.
The original birds fell so short of range and economy targets that Douglas had to spend all remaining money (which wasn't a lot) trying to eke out what they could.
Vertical wipers are more aerodynamic than horizontal ones- see the ERJ family. I suspect we will see more of this design in the future, now that every bit counts.