If this were true, then every single rocket calculation ever was off by a factor of two, and worse, in the wrong direction - it would take twice as much energy to get them going as science predicts!

So why doesn't every rocket fall to the ground?

I don't know what's worse - your terrible science, your execrable math, or your astonishing arrogance.

You honestly believe you are far smarter than Newton, Einstein, Stephen Hawking, Richard Feynman, Isaac Asimov, Laplace, Lagrange... put together!

Indeed, in your view of the world, all of them were stupid, because they missed what you believe was a gross error - a factor of two!

Why don't you actually perform the experiment and prove everyone wrong? It would be very easy to do - you could do it in your home.

With a factor of two, it would be grossly obvious that you were right, and everyone were wrong.

That is, if you were right.

The reason you don't do the experiment is because you know you're wrong.