Northrop Grumman B-21 Raider (LRS-B)

[Rhinocrates]

Considering how ruthless they've been in shaping the plane, I think it unlikely that there'd be any odd bumps on the final design. Perhaps test equipment or an antenna peculiar to the prototype?

 

[Scott Kenny]

Considering how ruthless they've been in shaping the plane, I think it unlikely that there'd be any odd bumps on the final design. Perhaps test equipment or an antenna peculiar to the prototype?

The light doesn't lie, however. There's a well-faired bump on the tail.

 

[Josh_TN]

The light doesn't lie, however. There's a well-faired bump on the tail.

It might be a test article, but also that would be an incredibly obscure place to generate a radar reflection, especially at 50,000 feet.

 

[4decaa]

Scott is right, that light don't lie!
Considering B-21 test articles are essentially production aircraft, I don't know why there would be anything different on the test aircraft in terms of physical structure. Other than the air probe(s).

There is something (on the back of the aircraft) that the engineering team needed to accommodate for, and this something was worth a rear-aspect RCS penalty.