Bongo From Colombia, joined Oct 2003, 1832 posts, RR: 7 Posted (6 years 2 months 23 hours ago) and read 2780 times:
Sorry if this has been discuss it before, but I want to know besides the beautiful winglets and I guess avionics, which are the differences between an MD11 and a DC10?
MDE: First airport in the Americas visited by the A380!
Skywatch From United States, joined Mar 2005, 916 posts, RR: 8 Reply 9, posted (4 years 8 months 2 weeks 5 days ago) and read 2137 times:
Is there any way to tell the difference from a DC10 and a MD10 while in flight? I see FedEx fly both over my house, but I have to use flytecomm.com to tell the difference. Any foolproof methods to identify them just by viewing the exterior?
Pilotpip From United States, joined Sep 2003, 2639 posts, RR: 14 Reply 10, posted (4 years 8 months 2 weeks 4 days 19 hours ago) and read 2078 times:
You can tell by the registration numbers. Aside from that unless you can look in the cockpit or see the "MD-10" designation on the nose it's pretty tough.
IFIXCF6 From United States, joined Sep 2004, 102 posts, RR: 0 Reply 11, posted (4 years 8 months 2 weeks 4 days 13 hours ago) and read 1993 times:
Skywatch,
How close over your house? From farther away, only winglets (MD11) or lack thereof (DC10, MD10), or (harder to spot until you know both) a 30% larger horizontal stabilizer (tail) for the DC/MD10. A couple of other items with closer inspection include (for the MD11): a more simple outflow valve; as mentioned earlier, 7 inch larger fan inlets (GE engines); a "squared-off" tailcone; a "bulbuous" #2 nacelle (only PW powered DC10's had this feature, and none are MD10's); and finally (in my mind), DC/MD10-10's have no center gear, all MD11's do.
Skywatch From United States, joined Mar 2005, 916 posts, RR: 8 Reply 13, posted (4 years 8 months 2 weeks 4 days 11 hours ago) and read 1956 times:
FedEx is usually within 1/2mile, but sometimes right overhead. As far as I know, FedEx does not fly any MD11's into KAUS regularly. However, I do see MD10's and the more frequent DC10. Only occasionally will they have their gear down when they are visible. When passing my place, these aircraft are usually at..Oh, I'd say 4000-5000ft.
CosmicCruiser From United States, joined Feb 2005, 1734 posts, RR: 17 Reply 14, posted (4 years 8 months 2 weeks 2 days 17 hours ago) and read 1794 times:
FYI...the MD-10 has a faster processor in its FMC than the MD-11. That's the only advantage in flying one. There are other differences in the MD-10 avionics but nothing one could see. Also the "AIR SYSTEM" is only operated in "MANUAL" and doesn't have "AUTO" like the MD-11.
CRJ200Mechanic From United States, joined Feb 2005, 204 posts, RR: 2 Reply 15, posted (4 years 8 months 2 weeks 2 days 17 hours ago) and read 1792 times:
CosmicCruiser From United States, joined Feb 2005, 1734 posts, RR: 17 Reply 16, posted (4 years 8 months 2 weeks 2 days 16 hours ago) and read 1788 times:
I checked the MD-11/MD-10 walk around inspection CD and found no reference to any diff. as far as the pilot is concerned. Sorry, this is a question for a tech. rep.
FDXMECH From United States, joined Mar 2000, 3251 posts, RR: 49 Reply 17, posted (4 years 8 months 2 weeks 2 days 15 hours ago) and read 1776 times:
A good way to differentiate the DC10 from MD10 is the upper VHF antenna (sharkfin). The DC10 antenna is way forward while the MD10 is much further aft (like the MD11).
With this setup they need not anti-ice the antenna while #2 engine anti-ice is selected on.
The engines need more air then the original DC-10 CF6s. Easy fix on #1 & #3 just give it a new nacelle. For #2 they used the original "banjo" vert stab spars -- so they made the intake wider up front and it narrows down to go through the original, smaller, DC-10 spar opening.
CosmicCruiser From United States, joined Feb 2005, 1734 posts, RR: 17 Reply 19, posted (4 years 8 months 2 weeks 2 days 13 hours ago) and read 1762 times:
Quoting SATL382G (Reply 18): engines need more air then the original DC-10 CF6s. Easy fix on #1 & #3 just give it a new nacelle. For #2 they used the original "banjo" vert stab spars -- so they made the intake wider up front and it narrows down to go through the original, smaller, DC-10 spar opening.
That's news to me since (as far as we are taught) the engines are the same DC-10 eng. They are not the MD-11 eng. Can you tell me your resource?
SATL382G From , joined Dec 1969, posts, RR: Reply 20, posted (4 years 8 months 2 weeks 2 days 12 hours ago) and read 1740 times:
Quoting CosmicCruiser (Reply 19): That's news to me since (as far as we are taught) the engines are the same DC-10 eng. They are not the MD-11 eng. Can you tell me your resource?
To what aircraft are you refering? The Dc-10-40 and the MD-11 both had increased mass airflow requirements as opposed to the CF6 powered DC-10s. Therefore they both had the "bulged" number two intake.
CRJ200Mechanic From United States, joined Feb 2005, 204 posts, RR: 2 Reply 21, posted (4 years 8 months 2 weeks 2 days 10 hours ago) and read 1729 times:
Quoting SATL382G (Reply 18): For #2 they used the original "banjo" vert stab spars
Okay, that makes sense. For some reason I was thinking of a four engined plane. Thats why it just didn't register with me. Forgot that it only had three. Thanks for the info
Always remember the responsibilies you hold with an A&P license
AeroWeanie From United States, joined Dec 2004, 1527 posts, RR: 54 Reply 22, posted (4 years 8 months 2 weeks 2 days 10 hours ago) and read 1728 times:
The DC-10-10 uses CF6-6s and the -30 uses CF6-50s. The mass flow requirements are close enough that they share a common #2 inlet. When the DC-10-40 was developed, the JT9D required more massflow, so a banjo frame with a bigger hole was developed, along with the bulged #2 inlet. As the CF6-80C2 and PW4060 used on the MD11 require these high massflows, the -40 specific mods were carried over.
SATL382G From , joined Dec 1969, posts, RR: Reply 23, posted (4 years 8 months 2 weeks 2 days 3 hours ago) and read 1694 times:
Quoting AeroWeanie (Reply 22): so a banjo frame with a bigger hole was developed
AeroW,
Are you sure? I thought McDoug didn't want to retool the 4 Banjo fittings. The outside diameter is certainly the same, giving the MD-11 and DC-10-40 #2 ducts their peculiar "pinched" look.
CosmicCruiser From United States, joined Feb 2005, 1734 posts, RR: 17 Reply 24, posted (4 years 8 months 2 weeks 2 days 3 hours ago) and read 1691 times:
Quoting SATL382G (Reply 20): To what aircraft are you refering? The Dc-10-40 and the MD-11 both had increased mass airflow requirements as opposed to the CF6 powered DC-10s. Therefore they both had the "bulged" number two intake.
This post got a little off track and I followed. The original post asked about MD-11/DC-10 diff. and somewhere along the replies it included the MD-10s as well. I was referring to our MD-10s and they have the same respective eng DC-10-10 or DC-10-30. There was no change with the MD- mod. Sorry for the confusion. Also, as someone pointed out the MD-10 doesn't have FADEC nor does it have LSAS .
AeroWeanie From United States, joined Dec 2004, 1527 posts, RR: 54 Reply 25, posted (4 years 8 months 2 weeks 1 day 22 hours ago) and read 1664 times:
SATL382G:
I remember an article in Av Week during the MD11 development that talked about the banjo frames and how they were different for the -40 and that this design was being carried over to the MD11. The article even had a picture of one of the frames (I think they are forgings). Now, I've got to find it...
26 CaptOveur: I am normally way out of my league on here but I do believe the bulge in the front of the #2 nacelle on the -40s were there to house a water injectio
27 AeroWeanie: CaptOveur: I think that would be a wierd place to put a water injection system. Instead, I think it is bulged because the highlight (inlet area) of th
28 CaptOveur: OK.. you made me go dig out the magazine.. Airpower Jan 2002 vol32 number 1 Page 30 photo caption: Photo is a side view, Northwest Orient DC-10-40 N14
29 SATL382G: There may well be water tanks there, however the bulge is for increased airflow thru the intake. Note that the duct expands again aft of the banjos.
30 AeroWeanie: I think the bulge was just a convienent empty space to put the water tanks into. The thought of a round, or horseshoe shaped, water tank still strikes
31 LMP737: This actually falls under "similarities category. Actually it's one similarity between the DC-10 and MD-11 I wish were different. To service the three
Sponsor Message: 
From Colombia, joined Oct 2003, 1832 posts, 
From , joined Dec 1969, posts, 
From United States, joined Nov 2002, 13893 posts, 
From Japan, joined Aug 2003, 4514 posts, 
From Mexico, joined Jul 2003, 1775 posts, 
Sponsor Message: 
Printer friendly format
