ORIGINAL: TFF
Think of it like one of those guru people who sleep on the nail beds. When their body is large they get to distribute their weight over more points. GI Joe size and he has been pungy stuck. The nails dont change size only the person.
That's a nice analogy. Smaller model = fewer air molecules pushing it up.
I can't help thinking that the reason that the Clark-Y is so well established in model airplanes is that for most of the history of scale modeling the models were pretty small. But now that 1/4 scale is starting to be the "norm" (and 1/3 scale quite common) for WWI models, do we really still need the Clark-Y?