Originally Posted by lyman
How is it all of a sudden an energy source is not relevant? It is consistent with your view of Physics as squishy, and dependent on your definitions, definitions that involve a suspension of actual Physical Laws.
Any widely held theory that depends entirely on suspension of fundamentals seems to attract hysterics..
Lyman, the laws governing the behavior of energy are completely independent of frame of reference, as long as that frame remains consistent throuought the analysis.
That is fundemental, first day, elememtry physics, yet you want to mock it as "squishy". This ain't "squishy", it's a fact. You can look it up. There's really no point in arguing fundamental, verifiable fact with somone who doesn't have a grasp of them. You really don't have a clue how badly misinformed you really are, do you?
Originally Posted by lyman
Air is the recipient of added energy, not the source. Watch your landscaper blow debris about with a leafblower, you will perhaps see my point.
Your insitence that there is something very significant and meaninful in the fact that the airfoil is moving through the air as opposed to the air moving over the airfoil would necessarily demand that a completely different set of aerodynamic principles would keep a J3 aloft when maintaining a stationary position over the earth, flying into a 70 knot headwind than those keeping it aloft when it is flying 70 knots over the earthe surface through still air.