4 ms·
Well, the free energy thing. The 747 weighs something like 735,000 lb.s but it's four engines only produce around 200,000 lb.s of thrust (if I'm reading wikipe
by tocomment 14y ago
Well, the free energy thing. The 747 weighs something like 735,000 lb.s but it's four engines only produce around 200,000 lb.s of thrust (if I'm reading wikipedia right)
So the plane doesn't have enough power to counter-act its weight. There's something about the air that's actually supporting the plane. And no one knows what it is yet.
- HeyLaughingBoy 14y agoOf course we know what it is. It's LIFT. The engines only have to be able to overcome the drag caused by the lift in order to fly the plane. In reality they are far more powerful than needed, so they can accelerate it to very high speed. Forget the plane, let's look at something a bit simpler that's basically the same principle. I have a driveway that's maybe 10 feet high from end to end. At max thrust, my legs can (or used to be able to) lift around 350lbs straight up. But yet I can push a 500lb+ machine up the driveway without much trouble. Does that mean I'm producing free energy? Hint: google "wedge"
- tocomment 14y agoBut a driveway is a solid is that different than a gas? You can really have a wedge effect with a gas?