Tarzanboy From United States of America, joined Sep 2003, 132 posts, RR: 0 Posted (4 years 5 months 1 week 5 days 8 hours ago) and read 5325 times:
Are there any DC-9 drivers here? Have you ever flown the DC-9 30 or 50?
What is the rotation technique? I have seen some cockpit pictures of the PFD and the attitude pitch lines are graded in intervals of 5 degrees, so moving up from the horizon there are 2 bars and then a 15 degree bar labelled 15.
I have been searching online but could not find the answer to this question, at what pitch attitude angle would the DC-9 30 or 50 [not MD-80] have a tailstrike?
Tb727 From United States of America, joined Jun 2005, 1649 posts, RR: 9
Reply 2, posted (4 years 5 months 1 week 5 days 7 hours ago) and read 5263 times:
Easy, pull back on the yoke!
I'm not on the 9 but looking at the manual, a normal rotation is 3 degrees per second to the target all engine pitch attitude in one smooth motion. You will whack the tail at approx 11.5 degrees with the mains still planted on the ground.
PGNCS From United States of America, joined Apr 2007, 2858 posts, RR: 48
Reply 9, posted (4 years 5 months 1 week 4 days 6 hours ago) and read 4564 times:
I have flown every variety of DC-9 except the -20. Rotate at approximately 3 degrees per second. Two engine pitch for climbout will be around 13-18 degrees nose high depending on a host of conditions such as weight, temp, altitude, engines installed, etc. Too many specifics to generalize, but 15 degrees nose high is the normal two engine attitude plus or minus a couple of degrees, with single engine climbout attitude being maybe 4 degrees lower initially (12.5 is a common initial target). It is rather difficult but not impossible to get a tailstrike on takeoff in a DC-9, much harder than a 757 or 767-300 for instance.
I don't have my manual set handy (I am not currently flying the DC-9), but I recall that a tailstrike happens on takeoff at a tad more than 11 degrees pitch, which seems to square with what Tb727 is saying. If you rotate at the correct speed at 3 degrees per second you won't hit the tail.
There is absolutely nothing novel or unpredictable in the handling of the DC-9; rotation is entirely conventional.
As has been said ad-nauseaum, there's nothing special about the take-off procedure for the DC-9s. And I've seen 3 deg. per sec. rotation rate quoted in AFMS and used as a rule of thumb in everything from a C150 to 737s and 777s
Bonus points to anybody who can come up with an airplane or two that would be very different from the norm
Hey Tb727, out of curiosity, if you don't fly the DC-9, where did you get the manual!?
I'm on the 72 but for whatever reason I get a copy of the DC-9 as well when we get revisions on CD, I think I just asked for it last time. I wouldn't give out my companies manuals because we are small and our name is all over it(plus I am pretty sure I am not allowed) but the site that PGNCS directed you to would probably be good enough for an avid aviation fan like yourself. For $17, that's pretty good for reference only.
jetlagged From United Kingdom, joined Jan 2005, 2577 posts, RR: 25
Reply 18, posted (4 years 5 months 1 week 2 days 13 hours ago) and read 4166 times:
This site has a large amount of operations manual info to download, including normal takeoff procedures. Unfortunately nothing on the DC-9, but there are sections on the 717 and MD80 which are closely related.