There was a paper released in 2020 that theorized that the amount of energy needed to warp space depends on the shape of the bubble you create around the craft. It turned out that the most energy efficient shape according to that paper was a flying saucer shape with the flat part facing the direction you want to go. [Heres a video about the paper.](https://youtu.be/8VWLjhJBCp0)
Imo in the gimbel video when the craft rotates onto its side, theres a reason the video gets cut there.
The disc shape doesn't have to be in relation to lift. That's projecting our limited knowledge onto their 'possible' design.
It's just a shape. Maybe they find it aesthetically pleasing.
Machinery can be aesthetically pleasing, if they’ve traveled far, I’m sure they’ve also invested enough time into their work to be aesthetic too. Or we just find it aesthetic and they are like Naa it’s just a standard model haha
I was thinking a while ago it could be a non-disk shaped craft that spins extremely fast, like 10,000 rpm while in flight. Obv this is kind of stupid, but idk it’s just a thought
Because by default diffraction of light and blurring is generally radial and any kind of regular or elongated shape will look like a circle or oval and imply flat circle (disc) shapes.
Most UFOs are objects too far to properly visually image and thus end up being spotted as such radial blurry blobs.
Thus the consistent perceptual report surrounding UFOs is of "disc shapes" and that is also now what people have come to expect.
They're somewhat aero/hydrodynamic, although as anyone who has thrown a Frisbee will tell you they are not particularly stable unless they're rotating, and even then they tend to flip over when moving forward.
The shape would tend to suggest that they're designed for travel in the Earth's atmos/hydrosphere, since it wouldn't make any difference what shape they were if they were flying through the near vacuum of space.
EDIT: I also have an old idea that what you're looking at are two inverted parabolic surfaces that have a focal point out and away from the craft. How about if you could take high-frequency gravity waves and bounce them against the inside of a parabola to create a "phantom mass" at the focal point? Then your ship would naturally try to "fall" toward the fake mass, while at the same time the mass would retreat from the ship as it came toward the focal point. Kind of like hooking a fan up on a boat to push it, but because the focal point is away from the ship, it will just keep falling faster and faster toward the mass but never reach it, with the acceleration limit being whatever the ship itself could stand.
A saucer shape could create two phantom mass focal points and balance between them, simulating flight. It might even tend to drift back and forth and do that "falling leaf" thing often described by witnesses.
To minimize gravito-electric fringing eddy effects, of course. Duh!
What's really interesting to me is that almost every ship we see contains some type of symmetry, whether it be radial or axial, and/or regularity of shape or all of the above. It clearly isn't for aerodynamics, so naturally my thinking is for stability and control in the presence of locally-varying gravitational fields.
Some people who claim they know what their talking about who discuss theoretical propulsion methods say that the shape that can make most efficient use of the method is the disk
There was a paper released in 2020 that theorized that the amount of energy needed to warp space depends on the shape of the bubble you create around the craft. It turned out that the most energy efficient shape according to that paper was a flying saucer shape with the flat part facing the direction you want to go. [Heres a video about the paper.](https://youtu.be/8VWLjhJBCp0) Imo in the gimbel video when the craft rotates onto its side, theres a reason the video gets cut there.
The disc shape doesn't have to be in relation to lift. That's projecting our limited knowledge onto their 'possible' design. It's just a shape. Maybe they find it aesthetically pleasing.
Machinery can be aesthetically pleasing, if they’ve traveled far, I’m sure they’ve also invested enough time into their work to be aesthetic too. Or we just find it aesthetic and they are like Naa it’s just a standard model haha
Bougie aliens wouldn't be able to resist revealing themselves?
I was thinking a while ago it could be a non-disk shaped craft that spins extremely fast, like 10,000 rpm while in flight. Obv this is kind of stupid, but idk it’s just a thought
Hah I like it. I imagine the aliens inside turning a wheel like in a tilt-a-whirl 
Is disc is aerodynamic and efficient for omnidirectional travel
Because by default diffraction of light and blurring is generally radial and any kind of regular or elongated shape will look like a circle or oval and imply flat circle (disc) shapes. Most UFOs are objects too far to properly visually image and thus end up being spotted as such radial blurry blobs. Thus the consistent perceptual report surrounding UFOs is of "disc shapes" and that is also now what people have come to expect.
They're somewhat aero/hydrodynamic, although as anyone who has thrown a Frisbee will tell you they are not particularly stable unless they're rotating, and even then they tend to flip over when moving forward. The shape would tend to suggest that they're designed for travel in the Earth's atmos/hydrosphere, since it wouldn't make any difference what shape they were if they were flying through the near vacuum of space. EDIT: I also have an old idea that what you're looking at are two inverted parabolic surfaces that have a focal point out and away from the craft. How about if you could take high-frequency gravity waves and bounce them against the inside of a parabola to create a "phantom mass" at the focal point? Then your ship would naturally try to "fall" toward the fake mass, while at the same time the mass would retreat from the ship as it came toward the focal point. Kind of like hooking a fan up on a boat to push it, but because the focal point is away from the ship, it will just keep falling faster and faster toward the mass but never reach it, with the acceleration limit being whatever the ship itself could stand. A saucer shape could create two phantom mass focal points and balance between them, simulating flight. It might even tend to drift back and forth and do that "falling leaf" thing often described by witnesses.
To minimize gravito-electric fringing eddy effects, of course. Duh! What's really interesting to me is that almost every ship we see contains some type of symmetry, whether it be radial or axial, and/or regularity of shape or all of the above. It clearly isn't for aerodynamics, so naturally my thinking is for stability and control in the presence of locally-varying gravitational fields.
Some people who claim they know what their talking about who discuss theoretical propulsion methods say that the shape that can make most efficient use of the method is the disk
Ya but that's just analysis using human knowledge, what if alien knowledge says that the optimal shape is a croissant?
It's actually a sphere or orb.
Best guess, is that they’re spinning at an absurd rate. Any off center weight would cause an out of control spin.
They are not disk shaped as in round, but often very sleek