C5LOAD From United States of America, joined Sep 2008, 917 posts, RR: 0 Posted (7 years 1 week 5 days 3 hours ago) and read 6231 times:
Hello A.netters If this has been posted previously, forgive me. The other day I was watching an Evergreen 747-200 being loaded next to a FedEx MD-11. I got to wondering why there are no large cargo doors forward of the wings on the side of the 747 like they are on most other cargo a/c. Wouldn't that help alleviate some problems like trying to get around the wing like in the aft part, or help by simultaneously loading through the front and aft sections. Any ideas?
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Spacepope From Vatican City, joined Dec 1999, 3311 posts, RR: 1
Reply 1, posted (7 years 1 week 5 days 3 hours ago) and read 6201 times:
The area under the upper deck is much lower than the rest of the fuselage. A SCD forward of the wing would mean you couldn't load full height pallets. That;s why the pure freighters have a nose door (for long things) and the SCD (for big things).
GARUDAROD From United States of America, joined Apr 2000, 1558 posts, RR: 1
Reply 3, posted (7 years 1 week 5 days 2 hours ago) and read 6108 times:
There are generally two types of B747 Freighters, those that were manufactured as a Freighter or Convertible and those that were converted from passenger aircraft into a Freighter.
The purpose built freighters, except for a few aircraft, have both an opening Nose door and a side loading cargo door. The nose loading door will allow pallets upto 96" high to loaded through it, while the SCD will allow pallets upto 120" high to be loaded. Each pallet through the SCD has to be contoured to fit the side walls of the aircraft, the 120" will face the middle of the aircraft. There are approximately 6 or 8 pallets that have to be restricted to 96" high to fit under the Hump/Cockpit area of the aircraft. Freighters are often load/unload through both the nose and the SCD. Converted Freighters only load through the SCD.
ZANL188 From United States of America, joined Oct 2006, 3826 posts, RR: 0
Reply 4, posted (7 years 1 week 5 days ago) and read 6011 times:
Quoting C5LOAD (Thread starter): Wouldn't that help alleviate some problems like trying to get around the wing like in the aft part, or help by simultaneously loading through the front and aft sections.
Actually getting a loader into the rear door on 747 isn't as hard as it looks. The only loader I've ever seen have a problem is the 60K-loaders USAF uses - has to be lined up just so or it comes in contact with the flap fairings when the deck is raised, this is due to the length of the loader.....
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Viscount724 From Switzerland, joined Oct 2006, 28752 posts, RR: 24
Reply 5, posted (7 years 1 week 4 days 16 hours ago) and read 5926 times:
Quoting OldAeroGuy (Reply 2): The 777F main deck cargo door is aft of the wing. This is a better location for minimizing loader - airplane interference and helps to ensure the airplane will not tip on its tail during loading.
The 5 MD-11C combis built for AZ (the only ones built) also have the main deck cargo door aft of the wing. On the.MD-11F freighter it's in front of the wing.