Factors of Scale

[Zipper730]

I'm not sure where his (0.0001*span^3.2238) came from.

It was on the graph

He has plotted weight (oz.) vs. span (in.) on a log-log plot. So I think he has calculated the slope to derive that relationship. On his line, 100 oz. crosses at about 64 in. So, (0.0001*64^3.2238)~=66.5. Ok, but I think the coefficient will only be correct for this set of units (ounces vs. inches).

I would also speculate that the scaling figure would also only apply for specific circumstances.

The 747 might be on the scale, but there are exceptions: The F-105 for example

 

[Zipper730]

And Harding's page is no longer online. I'm kind of looking through my old posts to find stuff, and this one was really useful as it had a way to calculate propeller velocity.

 

[Fascinated]

And Harding's page is no longer online. I'm kind of looking through my old posts to find stuff, and this one was really useful as it had a way to calculate propeller velocity.

Turns out I had saved a copy, lemee see if I can get it here.