Aviation aficionados swoon over the supple lines of a G-550, the elegant contours of an F-22, and the dangerous curves of a MiG-29. But not every plane is a thing of beauty. Here are the seven ugliest jet aircraft of all time. By turns stubby, lumpy, bulgy, swollen, and pinched, these jets are monuments to aircraft engineering gone horribly wrong.

#7 A-10 Thunderbolt II

The official Air Force name for the A-10 is the Thunderbolt II, an homage to the great ground attack P-47 Thunderbolt of World War 2. But due to its porcine appearance it’s more commonly known as the Warthog. It may be ugly but the Warthog gets the job done. Since its introduction in 1977, the the A-10 has been the premiere close air support plane in the world. The scourge of enemy tank crews, the Warthog, also sometimes known as the “Tank Buster” delivers lethal firepower at the front-lines of combat.

#6 Boeing X-32 JSF

The competition to build the US Air Force and Navy’s next generation light fighter jet, termed the Joint Strike Fighter, saw two rivals compete for what would be a massive government contract. Lockheed’s X-35 looked every bit like the sleek modern fighter of the future. Boeing’s X-32, however with is massive chin mounted air intake and uniform delta shaped wing presented looked clunky and awkward. While defense department officials insisted that aesthetics played no role in their decision, it’s no wonder that the elegant X-35 design won out. After all, fighters usually “look right.”

#5 Saab J 29 Tunnan

An unfortunate design characteristic of the Saab J 29 Tunnan finds its tail section extending out beyond the planes engine exhaust, makes it appear that something is protruding into (or out of) the posterior of the 1950s fighter. We knew the Swedes were a permissive people, but this really takes the cake!

#4 Tacit Blue

Tacit Blue was a technology demonstrator developed by Northrop and the US Airforce in the early 80s to test some of the stealth technology which would be incorporated into the B-2 and F-117A. While it was successful in incorporating various new radar evading technologies, it looks like the designers got drunk one night and decided to take an exacto knife and cut ninety degree angles across various surfaces of the plane.

#3 Airbus A300-600ST (Super-Transport) Beluga

The Airbus Beluga, is a version of the European consortium’s venerable wide-bodied A300-600 wide-body airliner, modified to carry extra large aircraft parts for planes in various stages of assembly. With it’s humped back, bulbous fuselage, and long sloping nose it really does possess an uncanny resemblance to a porpoise— hence the Beluga designation.

#2 Lun Ekranoplan

The Lun Ekranoplan barely even qualifies for this list, seeing as it only nominally flies, skimming just a few hundred feet over the water. Designed as a defense for the Soviet Black Sea and Caspian Sea fleets, its carried six anti submarine missiles mounted along the roof of the fuselage. Its bizarre appearance—stubby wings, and eight engines fixed besides the cockpit— led NATO analysts to dub it the “Caspian Sea Monster.”

#1 XF-85 “Goblin”

The designers at McDonnell Douglas clearly knew they had built a plane with less than elegant looks when they gave it the moniker the “Goblin.” Only slightly more sensitive to the plane’s appearance—though no less descriptive— is its nickname “the flying egg.” One of the first proposed US jet fighters, the snub-nosed XF-85 was designed to be dropped from the belly of a B-36 fortress to ward off any interceptors. Thankfully the concept proved to be unfeasible, and the US Air Force was saved the embarrassment of relying on a comically unintimidating plane for defense of its nuclear deterrent.