> Simply put, this means a scale model won't behave very much like the full-size craft. This is a basic fact that is known for decades in the field of science

> Simply put, this means a scale model won't behave very much like the full-size craft. This is a basic fact that is known for decades in the field of science and engineering. This isn't pose any problem in modelling. Sometimes, it's far better to study scale models instead of CFD models because in spite of the scale differences, it's possible to reproduce fluid dynamics results in reducd models while computational models fail to even account for them. See: http://en.wikipedia.org/wiki/Dimensional_analysis http://en.wikipedia.org/wiki/Dimensional_analysis