Aviation has always pushed the boundaries of imagination and engineering — but some aircraft designs go beyond innovation and land squarely in the realm of the bizarre. In this list of the top 10 weirdest aircraft ever built, we explore not just the strange shapes and features of these flying machines, but also the compelling stories behind why they were created.

From the bulbous and bug-eyed McDonnell XF-85 Goblin, designed as a “parasite fighter” to be dropped from a bomber, to the flying pancake-like Vought V-173, some of these aircraft look more like science fiction props than real-world prototypes. But each one had a purpose — often tied to military experimentation, aerodynamic exploration, or ambitious (if impractical) innovation.

One of the most iconic on the list is the NASA AD-1, a bizarre plane with a pivoting wing that rotated obliquely during flight. Meant to test aerodynamic efficiency at high speeds, the AD-1 looked strange but provided valuable data. Equally eye-catching was the Leduc 0.10, a jet powered by a ramjet engine with the pilot sitting inside the intake — a concept as dangerous as it was daring.

Not all weird aircraft were failures. The Antonov An-225 Mriya, while massive and odd-looking, became a beloved symbol of aviation power and possibility. On the other hand, aircraft like the Bartini Beriev VVA-14, designed to take off from water and fly at low altitudes to evade radar, were ahead of their time — and ultimately too complex to succeed.

These aircraft may have been impractical, flawed, or even failures, but they represent the boldness of engineers and visionaries who dared to think differently. In a world where sleek and standard designs dominate the skies, these weird creations remind us that sometimes, the strangest ideas can leave the most lasting impressions.