Originally Posted by JJM 777
Right, time for a tutorial on scaling. Let's make a 10% sized model of WTC2. It will have columns 10% of the stiffness (scales as area divided by length), but wind forces will be only 1% of the real ones because wind resistance scales with area. The weight will be only 0.1% of the real one (scales with volume). The fracture energy per floor will be 1% of the real one (scales with column area), but the gravitational potential energy (scales as volume multiplied by height) will be 0.01% of the real one. So energetically a 10% scale model will have a ratio of potential energy to fracture energy - the ratio that determines whether or not it will collapse - 100 times less
than the real building. So it won't collapse. Now if we weaken the columns by a factor of 100, it will collapse - but this test is discredited by the truth movement, because we have "tweaked the model to ensure collapse".
Summary: Scale models behave nothing like the real thing. If you won't believe it till you see a scale model collapse, then you won't believe it. Even though it's true.