X-59 starts engine for the first time

[Zaphod58]

Now I might not be an engineer, but if I had to point to the source of the noise it would be the giant jet engine on the back


It's looks very sick, will be keeping my eyes out for the X-59.

Putting it on top shields some of the noise better than having it embedded in the fuselage. It reduces the engine noise on the ground, which further quiets things.