OceansWorld From , joined Dec 1969, posts, RR: Reply 2, posted (6 years 5 months 3 weeks 1 hour ago) and read 20586 times:
Quoting KPDX (Thread starter): Is it normal for those planes to climb that steep? I know they climb steep already, but wow.
I've often seen DC-9s and MD-80s climbing that steeply right after lift-off, but I don't think this rate of climb can be maintained for long as engines thrust must be disturbed by the wings airflow. Just my
PGNCS From United States of America, joined Apr 2007, 2627 posts, RR: 45 Reply 12, posted (6 years 5 months 2 weeks 6 days 22 hours ago) and read 19663 times:
Quoting OceansWorld (Reply 2): but I don't think this rate of climb can be maintained for long as engines thrust must be disturbed by the wings airflow.
The airflow to the engines is not an issue.
Quoting RandyWaldron (Reply 6): e's nothing overly strange about this picture. It's a typical DC9 climbing after rotation.
Agreed. I have a lot of time in the DC-9 and MD-80 family, and it doesn't look excessive for a reasonable weight takeoff. Depending on the model, weight, flap setting, density altitude and several other factors, normal two engine pitch for a DC-9-30 will initially be around 15 to 18 degrees nose up. Many operators have advisories in their manuals not to exceed 20 degrees nose up for passenger comfort. At light weights the MD-80 and 90 series may accelerate well above V2+15 KIAS while holding the pitch at 20 degrees. The DC-9 and MD-80 series are quite good performers except when very heavy or at very high density altitudes.
Quoting PITops (Reply 9): After the DC-9 and MD-80s takeoff, they have a steep start but then seem to look like they are dropping a bit after about 20 seconds or so.
At 1,000 AGL we lower the nose to accelerate, just like most other aircraft. (There are exceptions to this rule in a few situations.)
Quoting IAHFLYR (Reply 11): They are most likely starting to configure for climb and retracting the flaps at 1,000" AGL or so.. That is quite apparent to all departing airline class aircraft.
PGNCS From United States of America, joined Apr 2007, 2627 posts, RR: 45 Reply 14, posted (6 years 5 months 2 weeks 6 days 21 hours ago) and read 19499 times:
Quoting DIA (Reply 13): That's fiddle faddle...just try to lean forward on this one:
Feel the G's yet?
Interestingly, airlines I have worked for limit the MD-80/90 series to 20 degrees nose up on takeoff for passenger comfort, while the 757 is limited to 18. There are exceptional procedures (SNA comes to mind), but in reality both will generally somewhere between 15 and 18 degrees nose up during the initial climbout.
AirTran717 From United States of America, joined Aug 2006, 746 posts, RR: 4 Reply 18, posted (6 years 5 months 2 weeks 6 days 14 hours ago) and read 17055 times:
Some airports and surrounding city areas have noise abatement restrictions. This requires a steep climb out to get beyond that area quickly. Orange County is one of them. 757's take a rather extreme departure angle on climbout there due to noise abatement. But, to add to others here, I see nothing out of the ordinary from this DC-9. Try going into MDW after a short final and they clear you in NOW. Feels like a strafing run from a P-51 Mustang. Better be strapped into your seats...
Hmm... thats usually normal for DC-9´s.... I´ve flown on 9´s a lot. Well a bit off topic now... but.... back in December.. I was on KE flight 038 from ORD to ICN on 26-Dec in a B744. ... man.... we used pratically every last foot and inch of RWY 32L. I was watching signs on the side of the runway.. we still hadnt rotated after passing the 1000 foot left mark.. somewhere between the 1000 and 500 mark the plane start to tilt towards the air and bounced a bit on the runway and then got airborne very sluggishly.... and we stayed on the same heading until we were at about 18,000 feet.. and the plane took forever and a day to get to the intial cruise altitude of FL290. The jet had FOB for 19 Hours and 100% capacity.. also 338 pax. and lots of cargo...
That photo is wonderful! Reminds me of take-offs in the Boeing 720B.
As for the DC-9 photo---looks normal. Of course with a full load on a hot day-----just because it has the angle does not mean it will climb like a rocket.
In the 1970's ATL was a bastion of DC-9's and there were plenty of hot summers days when one could observe DC-9's of all series struggling to gain some altitude after take-off.
Ever watched a heavy -50 on a hot day. Lead sled man.
"If everything seems under control, you're just not going fast enough!"
Flyingchoirboy From United States of America, joined Oct 2003, 281 posts, RR: 4 Reply 22, posted (6 years 5 months 2 weeks 6 days 12 hours ago) and read 15137 times:
Quoting ImperialEagle (Reply 21): In the 1970's ATL was a bastion of DC-9's and there were plenty of hot summers days when one could observe DC-9's of all series struggling to gain some altitude after take-off.
AirTran Airways B717s have (to some extent) taken over that role, and their climb is not too shabby, having seen plenty take off from there.
Flyingchoirboy: He sings, he flies, and sometimes he does both at the same time.