how do u explain the differences in the payload of the aircrafts

Huh???

Can you explain a little better?

Do you mean: Why can some planes carry a larger payload than others?

Welllll some cary more weight and the others don't..........

yup minnflyer..i'm trying to say that...=)..wat factors contribute to it hur?

yup i do understand that woody but why is that so>

basicly its all about wing loading, E.G you dont see many transports with a wing span/cord of say a Extra....

the bigger the wing the more lift it gives tie that with a huge amout of horse power and yu can carry more weight...

simply put the biger the wing area the more lift you get hence more weight weight..

Wingloading is important, and is usually the most important thing for sport flying and such.

However, if you are designing a "heavy lift" plane, then airfoil selection becomes very very important as well. You can also have things like flaps and slats that can really help.

By definition "payload" is "the amount of useful load (e.g. cargo, passengers, etc.) the plane can carry". Don't forget - the plane should also "carry" itself .

The total weight the plane can [safely] carry is "dirty weight" of the airplane (including fuel) plus payload. The rest is simple - more powerful engines should allow to carry more payload. Of course there are other factors, e.g. engine efficiency, etc., but I guess this is a jist of it.

In addition, other things being equal - the airplane with less "dirty weight" should be able to carry more "payload.

I think the most direct answer to your question is:

It is a combination of 3 things:

The size of the wing (In area)
The Airfoil of the wing, and
The amount of thrust that is moving the wing.

thanks alot guys..=)