Discounting turbofans if you read the text accompanying the animated illustration and compare it with the engine explanation provided by Rolls Royce you will find a basic disagreement. The Rolls Royce explanation uses a balloon analogy, which is correct, but the animated illustration (text) is incorrect because it leads the uninitiated reader to believe the jet exhaust is pushing against the surrounding air mass. If this were true, rockets would not work in outer space.
