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slinker
Topic Author
Posts: 25
Joined: Mon Feb 27, 2006 5:15 am

DC-10/MD-11 Engine #2 thrust question

Tue Jan 19, 2021 8:16 am

Hoping I can get a definitive answer on this. If both engines 1 and 3 are shut down in flight, does the nose pitch up or down? I think my brain is overcomplicating the physics involved with thrust, weight, center of gravity vs. center of thrust, etc...

Thanks!
 
Armadillo1
Posts: 647
Joined: Thu Apr 20, 2017 5:14 pm

Re: DC-10/MD-11 Engine #2 thrust question

Tue Jan 19, 2021 8:27 am

" If both engines 1 and 3 are shut down in flight", its the same as any twin. pitch-up moment removed.
 
atav
Posts: 4
Joined: Tue Aug 16, 2005 7:11 am

Re: DC-10/MD-11 Engine #2 thrust question

Tue Jan 19, 2021 10:41 am

slinker wrote:
Hoping I can get a definitive answer on this. If both engines 1 and 3 are shut down in flight, does the nose pitch up or down? I think my brain is overcomplicating the physics involved with thrust, weight, center of gravity vs. center of thrust, etc...

Thanks!


Because engine #2 is above the center of gravity, it causes a nose down moment. Engines 1 and 3 create a nose up moment like all underwing mounted twins.
 
CosmicCruiser
Posts: 2506
Joined: Tue Feb 22, 2005 3:01 am

Re: DC-10/MD-11 Engine #2 thrust question

Tue Jan 19, 2021 2:46 pm

And you've got bigger problems to worry about! LOL!

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