I am surprised no one bit on Dar's comment that when a prop is turning on a plane in the air at a speed that does not generate thrust, the drag is higher than when the prop is stationary. He said the result is that a dead stick landing has a shallower glide path than one at idle. I'm not sure that's true.

This is also really counter-intuitive, so if true, what is the explanation?

It also contradicts the long-standing practice of scale modelers who use rubber bands for power. These guys are constantly trying every trick to squeeze out a little more endurance. And they use free-wheeling props, even when using balsa props which do not have enough momentum to cause much reverse rotation. All they all wrong?

Jim