AgnusBymaster From United States of America, joined Feb 2001, 652 posts, RR: 0 Posted (13 years 7 months 3 weeks 6 days 7 hours ago) and read 2577 times:
What is the purpose of the open panel just below the cheatline towards the front of the fuselage? I used to think this was some kind of access panel that was closed prior to takeoff, but after seeing many a plane leave the gate with it still in the same position, I've decided that it must be something else.
Also, what about the little fins and the one big fin on top of the fuselage? Do they serve as transmitters of some kind or are they just there for aerodynamic reasons?
HA_DC9 From United States of America, joined Jul 1999, 662 posts, RR: 1
Reply 7, posted (13 years 7 months 3 weeks 5 days 6 hours ago) and read 2390 times:
"FDX is right. They were put onto the Md80s cause of their long fuselage. The older DC9s, which were much shorter didn't have them."
Actually, the DC-9-50's also have the strakes like the MD-80's. The DC-9-50's were the only ones out of the original DC-9 family to have them. They are also the longest aircraft of the original DC-9 family.