burberry753
Posts: 198
Joined: Sun Jan 09, 2005 6:15 am

767/777 Question

Sat Apr 09, 2005 12:50 am

Hi, why is it that the 767 doors are those electrical ones that the MD-11/DC-10/L1011 had?? And also the 777 doors are more like Airbus doors. Why did boeing change the doors from the usual 757/737 etc type??
cheers!!  Smile
 
dairbus
Posts: 518
Joined: Mon Nov 17, 2003 10:45 am

RE: 767/777 Question

Sat Apr 09, 2005 1:28 am

There are a couple of reasons that I am aware of in the case of the 777:



  • The slide on the 777 is quite large which makes it difficult if not impossible to have the door fit in the overhead like the 767 and other aircraft types.

  • The plug type doors on earlier Boeing aircraft work well on smaller aircraft but become unwieldly on the larger ones due to the bigger and thus heavier slide attached to the door. The doors on the 757 are notoriously difficult to close due to their weight and the emergency assist system that helps open the door in an emergency. I am not sure if the 747 has this problem as well since I have limited experience with them.

  • The doors were designed so that most of the parts making up the door mechanism are interchangeable between the different doors no matter their position. This reduced costs in manufacturing and maintenance.

  • The doors that slide into the overhead need a mechanism to raise them, usually an electric motor and a system of cables and pulleys, which add weight and complexity to the door system. The doors on the 777 are manual and do not need any mechanical assist.


    These are a couple reasons off the top of my head. Others can probably add some more information.

    Regards

    DAirbus
"I love mankind. It's people I can't stand." - Charles Shultz

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos