DC-10Tech From United States of America, joined Jun 2001, 298 posts, RR: 3 Reply 3, posted (12 years 1 month 1 week 4 days 19 hours ago) and read 3118 times:
The upward curving you're speaking of is call 'Dihedral'. While the DC-10 wing appears to be straight, it is actually called a dual dihedral because the wing roots actually curve up quite a bit until they meet the less-curved part of the wing near the pylons. Dihedral increases stability about the roll axis. The difference between the dihedral on the stabs of each aircraft may be due to the different configurations between the #2 engine arrangement. Just remember that the engineers designed these aircraft after a lot of wind tunnel testing, and the design of each aircraft has been found to be the best combination of aerodynamics, handling, and efficiency in the wind tunnel.
Buzz From United States of America, joined Nov 1999, 697 posts, RR: 23 Reply 4, posted (12 years 1 month 1 week 4 days 6 hours ago) and read 3096 times:
Hi Dc10tony and Tedski, Buzz here. I'll have to disagree with Tedski, since that AA DC-10 roll-over-and-die at ORD, the DC-10 have had a lock installed on the leading edge slat drive wheel and cable. Yes, there is a big wheel that pulls cables, thumped my head on it a few times. And i like Lockheed aircraft, we only had 6 of the L1011-500's to compare with the almost 60 DC-10's we were flying.
I'm not an expert at aerodynamics, but one thought: There's a mighty downwash of air coming off the wing, sometimes the horizontal tail has a lot of dihedral to get some of it out of the downwash as you get to higher angles of attack.
Buzz Fuselsausage: Line Mechanic by night, DC-3 Crew Chief by choice