China's transport, tanker & heavy lift aircraft

superdog

superdog

Junior Member
winton said:
Can someone tell me why the Y20 has such a large humpback where the wings attach to the fuselage? The C17 does not.
What is the design feature reason? Structural reason? Aerodynamic reason?

Is there some sort of chinese design/construct limitation?

Is
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When you look inside the C17's cargo bay you'll see a roof like this:

C17.jpg
The "beam" in the middle will restrict its ability to carry something that is both long and tall.

By lifting the wingbox upwards, you won't have such a restriction, but you will get a humpback and slightly increase drag.

9f35c2af868ea6d96b3fa69768389559.jpg
 
D

delft

Brigadier
superdog said:
When you look inside the C17's cargo bay you'll see a roof like this:

View attachment 29130
The "beam" in the middle will restrict its ability to carry something that is both long and tall.

By lifting the wingbox upwards, you won't have such a restriction, but you will get a humpback and slightly increase drag.

View attachment 29131
Click to expand...
Correct. It is a devise that has often been used in small and medium sized transport aircraft. In one low winged aircraft derived from a bomber, Vickers Viking VC1 derived from the Wellington bomber, the wing spars intruded into the cabin and people had to step over them. :eek:
 
W

winton

New Member
Registered Member
Okay, I get it now. So its a plus. It allows the fuselage to remain small while maximizing the interior space. Thats obviously allows the chinese to get away with building a smaller airframe yet able to carry the cargo she needs.
 
SteelBird

SteelBird

Colonel
The thread of "China's transport, tanker & heavy lift aircraft" has been dominated by Y-20 from the beginning. So it's time for a new type of heavy aircraft China has designed.

China unveils 'world's largest seaplane'
China says the AG600 amphibious plane is the world's largest.
Hong Kong (CNN)China has completed what it describes as the world's largest seaplane.

The amphibious AG600 is about the size of a Boeing 737 and will be used to fight forest fires and perform marine rescue operations, state-run news agency Xinhua said.
With a maximum take-off weight of 53.5 tons, the AG600 is the largest seaplane in the world, Xinhua said. It has a reported flight range of 4,500 kilometers and can collect 12 tons of water in only 20 seconds.
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Roll out ceremony
 
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danielchin

danielchin

Junior Member
Deino said:
Does anyone know why this Il-76MD received this "strange" blue-red-white scheme ??

View attachment 31285
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Could that be a new color scheme for 81 team's supporting transporter?

81supporting.jpg
 
kwaigonegin

kwaigonegin

Colonel
superdog said:
When you look inside the C17's cargo bay you'll see a roof like this:

View attachment 29130
The "beam" in the middle will restrict its ability to carry something that is both long and tall.

By lifting the wingbox upwards, you won't have such a restriction, but you will get a humpback and slightly increase drag.

View attachment 29131
Click to expand...

As long as it fits mbts and lavs and almost all us army palletized requirement it's passes the primary design requirement. Even with the cross beam overhead the height is still plenty good to clear strykers etc. and for something really really big big and long, the AMC has the C5 which has both front and aft openings.

China at this point in time doesn't have a indigenous C5 equivalent so they maximize the internal cargo volume on the Y 20 while sacrificing a lil bit of streamlining and engine efficiency. C17 has always been more about the ability to carry m1/Bradleys/strykers etc and AH 64s/cobras to the battlefield in rugged runways with shot turn radius.
 
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