The 777F and that Rear Cargo Door

RSS

If you've ever seen a 777F, you've probably noticed that the main cargo door is located behind the wings rather than forward of the wings as is typical of cargo aircraft, with the 747 being a notable exception. The reason for this, and arguably most other things in the airline industry, boils down to economics.

When Boeing was designing the 777F, one of the obvious questions that needed to be answered was where exactly to put the cargo door. Using cargo loading equipment and a real 777 for reference, Boeing and 777F customers determined that keeping loading equipment comfortably away from the #1 engine forward of the wings would put the cargo door partly into the curvature of the fuselage where it begins to slope down to the cockpit section. While likely not an engineering obstacle for Boeing, the increase in cost to accommodate this curvature made it an unattractive option.

In the end, it was found that positioning the main cargo door behind the wings gave the loading equipment acceptable clearance while keeping costs to a minimum.

Photo credit: Nigel Howarth

Please or Register to post comments.

What's Things With Wings?

Aviation Week's civil aviation blog

A Century of Aviation Week

Aviation Week & Space Technology is celebrating its 100th anniversary this year. In a series of blogs, our editors highlight editorial content from the magazine's long and rich history.

 

Aug 23, 2016
blog

When Aviation Week Was Accused Of Treason 21

Aviation Week editors routinely get blowback when they write about sensitive topics, and the best example of that may be an October 1957 story that revealed the U.S. had been tracking Russian missile launches from advanced long-range radar units in Turkey....More
Aug 5, 2016
blog

Airbus A-300: This Is The Start Of Something Big (1968) 16

The A-300 was touted as quiet, spacious, more efficient and twice as reliable as other airliners of the day....More
Blog Archive
Penton Corporate

Sponsored Introduction Continue on to (or wait seconds) ×