(via WikimediaCommons and Flickr/Aeroman3)

Ryan VZ-3RY Vertiplane, 1958


This VTOL or short take-off aircraft was built by the Ryan Aeronautical Company in 1958. It had 21 flights in 1958 and 1959, before it crashed. Later it was rebuilt with an open cockpit.

(via Kemon01/Flickr)

Hughes XH-17, 1952


The main rotor system, with a diameter of 134 feet (41 m), made the XH-17 "Flying Crane" capable of flying more than 50,000 pounds (23000 kg). It had the wheels of a B-25 Mitchell and a C-54 Skymaster, the fuel tank came from a B-29 Superfortress, the cockpit from a Waco CG-15 and the tail rotor from a Sikorsky H-19. Unfortunately the drive system wasn't efficient enough, and it limited the Flying Crane to a range of 40 miles (64 km).

(via Aviastar)

The Umbrella Plane or the McCormick-Romme plane, 1911


The famous aircraft builder Chance Vought built the first ever disc-form aircraft, the umbrellaplane, in 1911. It flew several times at Chicago's Cicero Field, according to contemporary sources.

(via The Airodrome Forum and Lincoln Beachey)

The Arup S-1, 1932


The first in a series of Arup planes was developed in South Bend, Indiana by Dr. Cloyd Snyder. It was called by Dirigiplane or the Snyder Gilder.

(via Nurflugel)

Nemeth Circle Aircraft or Roundwing, 1934


The aircraft with a circular wing on top of the fuselage was designed by an aeronautical engineer named Stephen Paul Nemeth.

(via Flickr/Kitchener Lord and Modern Mechanics/June 1934)

Phillips Multiplanes, 1904 and 1907


The earlier version had 20 wings in a row and a tail for stability, but can't flight more than 50 ft. The 1907 model had 200 wings in four rows and a 22 hp engine with a 7 ft propeller. It achieved a 500 ft flight.

(via Hargrave Flying Wings and Flying Machines)

The Burke "Seagull", 1910


The curved wings are lovely, but it never flew.

(via Powdan)

Avro Canada VZ-9 Avrocar, 1958-1959


The goal of a secret U.S military project was a fighter-like aircraft which could fly at extreme altitudes with a very high speed — but it had stability problems. Only two of them were built in 1958 and 1959, and the project was cancelled in 1961.


(via Wikimedia Commons 1 - 2 - 3)

Bartini Beriev VVA-14, 1972


It was built to be able to take-off from the water. The aircraft had 107 flights, (with a flight time of 103 hours) but after designer Robert Bartini's death the project was dropped. Now it's rusting in a Russian open-air museum.


(via Aviation Trivia and English Russia)