When Flying Saucers Travel Fast, Do They Do It …

[BEZARK]

 … the aerodynamic way?

Or dome first, bluntly?

When hovering, propulsion is down.

Does that imply blunt flight?

[Euwe]

If an object were traveling through Earth's atmosphere at reported 

supersonic or hypersonic speeds using conventional physics, you 

would expect several effects:

A sonic boom once it exceeds the speed of sound (about 767 mph 

or 1,235 km/h at sea level, depending on atmospheric conditions).

Shock waves forming around the object.

Significant aerodynamic heating, potentially causing the air around it to glow at very high speeds.

Tremendous drag and structural stresses.

Turbulence or disturbances in the surrounding air.

Many well-known UAP reports claim there was no sonic boom 

despite apparent high-speed maneuvers. If those observations 

were accurate and the objects were actually moving through the 

atmosphere at those speeds, that would not be consistent with 

conventional aerodynamics.

If an object is visible, it is interacting with electromagnetic radiation—it reflects, emits, or scatters light. Likewise, if it occupies space in the atmosphere, its surface should collide with air molecules. At high speeds, those collisions produce drag, compression, heating, and, above the speed of sound, shock waves.

Hypotheses sometimes proposed to explain the apparent absence of these effects include:

A surrounding plasma or ionized air envelope.

A gravitational or spacetime distortion around the craft.

An electromagnetic field that alters the surrounding air.

However, none of these has been demonstrated to allow a visible, macroscopic object to travel through the atmosphere at extreme speeds without the expected aerodynamic effects.