The material is moving highly supersonically and creates a shock wave ahead of it. |
All those who flew on the aircraft were given a meal and champagne, plus a certificate to say that they had travelled supersonically. |
But he has now developed a way to do so. As the supersonically flowing condensate slows down it creates a second boundary at the point where its velocity becomes subsonic. |
As you mention, a ramjet needs to fly supersonically, which a V1 flying bomb did not. |
It was realised in the 1950s, both from observations and from physical considerations, that this plasma must be supersonically expanding away from the Sun, and pervade the entire solar system. |
The channel expands supersonically into the surrounding air as a shock wave and creates an acoustic signal that is heard as thunder. |