Here is a rail gun test fire
https://www.youtube.com/watch?v=h6sAUHwTP4A
At 1:24 you can see the shock wave around the projectile
as it travels.
we’re so broke we’ve resorted to using connecting rods for ammo!
Where is all the flame coming from, if exposives aren’t involved in propulsion?
That reminds me of the wave motion gun, which is also terrifying.
https://www.youtube.com/watch?v=4phT2Vukvn0
I saw that video when it first came out, and calculated that the projectile oscillations you can see in the down range view (the one in which the shock front is so clearly visible) are at a rate of about 60 hz.
Looks like there is some work on stability of the projectile to be done yet.