[biff]

I find this very hard to believe.

There is a reason that Boeing has not bitten the bullet and build a competitor to the A380 in that there is a law of diminishing returns when it comes to flying machines. In other words, get much bigger than the 747 and the strength and power requirements do not offset the weight gain.

Structurally these “birds” would be too heavy and they could not produce enough power to fly.

[CGTRWK]

Weight goes up with the cube, wing area goes up with the square.

[Fred Nerks]

you may enjoy this topic:

The Impossible Dinosaurs - Megafauna and Attenuated Gravity
Kronia.com ^ | Ted Holden

Posted on Friday, March 21, 2008 8:01:20 PM by Swordmaker

http://www.freerepublic.com/focus/f-chat/1989265/posts

[Rider of Rohan]

Tell that to a bumble bee

[RGSpincich]

Structurally these “birds” would be too heavy and they could not produce enough power to fly.

[ohioman]

There is also no way in hell that these flying reptiles could kill any healthy T-Rex that is anything bigger than a baby.