UFO/Design & Capabilities

===Designs of Crafts Sighted===
The two UFOs that Mulder and Scully watched above Ellens Air Base in 1993 resembled two small, circular lights in the sky. Their design inspired Scully to uncertainly posit the notion that they were actually lasers, being shot from the ground and reflecting up off the clouds.
The UFOs that Mulder alone saw inside Ellens Air Base in 1993 were both dark and triangular in design. The first craft he saw had many bright lights that shone down on him, in a moving pattern. The second UFO was only partially visible, as the craft was shrouded by large sheets of plastic draped from the ceiling of the hangar where it was stored. 
Most alien spacecraft seem to be either triangle-shaped, or disk/saucer shaped, and of varying sizes. All of them tend to have an aperture on their underside, in the center, which emits light and seems capable of lifting things in to the craft. Other lights are seen on them, though what purpose these serve is unclear. Both of the ancient spacecraft found were triangular in shape.
===Designs in Depictions===
In his office at the J. Edgar Hoover FBI Building in Washington, D.C., Agent Mulder would often display photographs of UFOs on the walls. A poster on one wall proclaimed "I Want to Believe", under the image of a disc-shaped UFO. , et al.
In 1993, a sign outside "The Flying Saucer" diner, in Southwest Idaho, included a painted, cartoon depiction of another disc-shaped UFO, slightly higher than the rest of the sign. The UFO was connected to the main body of the sign by a thick, yellow trail emitted from the base of the craft.
Behind the bar in "The Flying Saucer" diner, four grainy photographs of UFOs were affixed to the bottom of a shelf, including one Ladonna claimed to have taken of the craft she had allegedly seen while she had been taking out the garbage. This image was clearer than the others and the UFO it featured, a dark triangle, was larger than those in the other images. Ladonna revealed she was selling limited edition prints of this image at twenty dollars each, but only had five left, before Mulder bought one. Emil later claimed that the UFO in this picture looked exactly like the crafts from Ellens Air Base he had seen but, while alone with Mulder, Scully revealed her suspicion that, even if Mulder had shown Emil an image of a flying hamburger, Emil would still have claimed that the UFOs he had seen looked exactly like the picture. Shortly after, Mulder showed Scully a black-and-white photograph that supposedly featured the UFO that had crashed in Roswell in 1947. Like the photograph that Ladonna had given him, this picture contained a dark triangle. Mulder was confident in his belief that there was a remarkable resemblance between the two photographs. 
An article that first alerted Mulder and Scully to the abduction of Ruby Morris was published in an edition of The National Comet. A picture on the front cover of the publication included a black-and-white line image representing the abduction, in which a saucer-shaped UFO could be seen, shining a light down on a camper, standing outside a tent.
The UFO sighting made in 1967 by the pilot of a National Weather Service plane as well as four Girl Scouts and their Den Mother was photographed by one of the girls, using an Instamatic camera. In 1993, Mulder showed Scully a light-blasted, digitally enhanced enlargement of the badly composed image. She initially wondered whether the photograph had been taken by the pilot, before Mulder clarified its origin. The UFO in this picture was oblong-shaped and was located above the tops of trees in the image.
In 1993, the bartender at the Pennsylvania Pub had a tattoo of a flying saucer that had a red and white top dome while the bottom was mostly a metallic gray. Mulder commented that the image made "a nice tattoo". 
===Systems & Capabilities===
====Power Supply====
In 1994, Freddie claimed that the UFOs seen over the Hatton Power Plant were drawn to electric power. 
In 1997, Max Fenig was involved in the theft of what was believed to be an alien power source, resulting in the destruction of a passenger jet. The exact nature of the device was never confirmed. 
====Propulsion====
Shortly after seeing Mulder's UFO poster upon first entering his basement office in 1992, Dana Scully told him that she did not believe in the existence of extraterrestrials, as conventional wisdom held that, "given the distances needed to travel from the far reaches of space, the energy requirements would exceed a spacecraft's capabilities." 
In "The Flying Saucer" diner in 1993, Ladonna claimed that the craft she had seen while taking out the garbage hovered and was "quiet like a hummingbird." Similarly, Emil later claimed that the UFOs from Ellens Air Base would occasionally approach at a low altitude, activate a noisy braking system and then silently hover.
The two UFOs above Ellens Air Base that both Mulder and Scully watched seemed to dance across the sky at incredible speed, leading Scully to dispute Mulder's belief that the UFOs were aircraft, stating that, "Aircraft can't maneuver like that". 
====Weaponry====
The UFO article Scully viewed in 1993, before she and Mulder headed to Ellens Air Base, included a section of text that read "UFO technology with stealth weaponry".
Zoe later claimed that, on one occasion, aircraft from Ellens Air Base had dropped bombs. 
It presumably has the light beam technology
====Invisibility====
Most of the ships seen after the dissolution of the in 1999 featured a cloaking device. Presumably, the ships seen previously shared this technology, but it was not known about until 2000 . In 1993, in Townsend (Wisconsin State) a UFO-crash surviving alien was able to remain invisible. Presumably he had a some kind of portable cloaking device that suggests that the crashed UFO also shared this technology. . 
In 2016, a man-made UFO/ARV ("Alien Reproduction Vehicle") also featured a cloaking device. This UFO was in a hangar and was disappeared way remote control.. According to scientists working in the hangar, and the well-known showman Tad O'Malley, the ARVs have had this technology since 1947, but this information has not been confirmed. 
==== Self-Repair ====
At least one alien spacecraft was capable of repairing itself, according to Alex Krycek . It seems that the alien bounty hunter's UFO was also capable of self-repair. In January 1995 the crew of the Alta research vessel saw that the UFO fell into the Beaufort Sea and exploded, but later the UFO was able make inoperable a nuclear submarine. 
The Cigarette Smoking Man's words suggests that only a special type of alien spacecrafts are capable of self-repair (TXF: "Requiem"), presumably with alien nanotechnology. These include even likely the ancient alien ships, the so-called "origin of life" ships, which were found in Africa (Ivory Coast) and near the Canadian border. 
Category:UFO