There is no such thing as centrifugal force; the correct scientific term is "centripetal". Likewise a "kilogram" is not a unit of weight (force) but rather one of mass (matter). Therefore a mass (substance) doesn't weigh anything until acted upon by a gravitational field. Often the term "weight" is used to mean "mass" even though they are not the same. Splitting hairs? Perhaps.

In a similar vein: tank on the CG? I'll do it if it's convenient and doesn't have any adverse effects. Tanner's is installed toward the front as called out in the plans (because it was easy, and I'm lazy) with the lines facing forward (because it was easy, and I'm lazy). The popsickle stick taped to the tank to keep it from sliding forward may have had an adverse effect on overall handling but he didn't seem to notice. Mashing the back of the tank down with the wing didn't seem to bother him, either. Someday he may learn about all this in Physics class and then he'll have reason to be concerned.

For now he'll just have to take what he gets and LIKE IT!

I just couldn't resist!

P.S. Perhaps I should check Hepperle's site to see if he has anything to say about numerically optimized fuel tank placement. ()