File talk:FA-18 Hornet breaking sound barrier (7 July 1999).jpg

I'm not so sure but if this is correct, isn't it better to change the name of this photo?

There is:

> Prandtl-Glauert condensation can form in both slightly supersonic and slightly subsonic flow

Then, it seems possible that the F/A-18 of this photo is actually breaking sound barrier. But not necessarily. At the Conclusions, however, the auther (a professor of Virginia Tech) says:

> Prandtl-Glauert condensation has nothing to do with "breaking the sound barrier"

Summing up:

1. We cannot say this F/A-18 is breaking sound barrier or not.
2. Even if the aircraft is breaking the sound barrier, it has nothing to do with the cloud.

In addtion, I'm afraid that when someone not knowing the facts above sees the photos of B-2 like this one, they may misunderstand that B-2s can fly supersonically. I mean, they probably think "This type of cloud around an aircraft is related to the breaking sound barrier" when they see this photo with this name, but again, this is incorrect according to the web page above.

Thus, I guess it is better to change the name of this photo to, such as "F/A-18 showing Plandtl-Glauert condensation cloud 01" or something like that. -- Marsian 08:43, 25 Jan 2005 (UTC) / mod Marsian 02:14, 27 Jan 2005 (UTC)