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Автор: John Smith
Дата: 25.05.16, @12:54

  SpaceX versus Blue Origin

The New Shepard and the Falcon 9 have very different designs, which stem from their very different mission goals. SpaceX's Falcon 9 rocket is meant to launch payloads — such as satellites and cargo — into orbit around Earth and beyond. It's why the rocket's shape is so thin and tall; it creates less drag on the vehicle, allowing it to break free from the atmosphere more easily and go deeper into space. But such a shape also makes it much harder for the rocket to land upright back on Earth. The engines on the bottom of the rocket help to orient it vertically during descent, but it's almost like dropping a lead pipe from the roof and having it land on its end. The rocket is prone to tilt and fall over.

"The New Shepard and the Falcon 9 have very different designs"

The New Shepard isn't meant to go as far up as the Falcon 9, however, which is echoed in the rocket's shape. The vehicle is only designed to take people to sub-orbital space for about four minutes. An object at this height isn't going fast enough to make a full rotation around Earth, so it hasn't quite broken free of the bonds of the planet's gravity and will eventually be pulled back down to the surface. Because New Shepard doesn't need go to the same heights as the Falcon 9, its shape doesn't need to be as tall and thin. Blue Origin's rocket sports a thicker and shorter structure, making it a tad easier to land vertically — albeit a still challenging task.

http://www.theverge.com/2015/11/24/9793220/blue-origin-vs-spacex-rocket-landing-jeff-bezos-elon-musk

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