Cance Vought USA

Vought V-173 "Flying Pancake"

Vought V-173 "Flying Pancake"

USA Aircraft

Chance Vought

The Vought V-173 "Flying Pancake" was an American experimental test aircraft built as part of the Vought XF5U "Flying Flapjack program"

Goto Vought Aircraft

The Vought V-173 “Flying Pancake” was an American experimental test aircraft built as part of the Vought XF5UFlying Flapjack program” during World War II.

Both the V-173 and the XF5U featured an unorthodox “all-wing” design consisting of flat, somewhat disk-shaped bodies (hence the name) serving as the lifting surface.[1] Two piston engines buried in the body drove propellers located on the leading edge at the wingtips.[2]

Operational History

In the 1930s, Charles H. Zimmerman was a noted aeronautical engineer who advocated the concept of “discoidal” aircraft, the so-called “Zimmer Skimmer”[3] and worked on a variety of projects on his own and with the Vought company. After testing using scale models, including a remotely controlled, electrically powered large-scale model, designated the Vought V-162, the US Navy approached Zimmerman and offered to fund further development. Data and concept documentation was given to the Navy in 1939, with wind tunnel tests on full-scale models being completed in 1940-1941.

RoleExperimental aircraft
First flight23 November 1942
Retired15 March 1947
Number built1
Developed intoVought XF5U


In January 1942, BuAer requested a proposal for two prototype aircraft of an experimental version of the V-173, known as the VS-135. The development version, the Vought XF5U-1, was a larger aircraft with all-metal construction, and was almost five times heavier.[6] Although a prototype was constructed, it was never flown, as Navy priorities had changed in the meantime

General characteristics

  • Crew: One, pilot
  • Length: 26 ft 8 in (8.128 m)
  • Wingspan: 23 ft 4 in (7.1 m)
  • Height: 14 ft 9 in (4.51 m)
  • Wing area: 427 sq ft (44.2 m2)
  • Gross weight: 2,258 lb (1,024 kg)
  • Powerplant: 2 × Continental A-80 horizontally opposed, four-cylinder engines, 80 hp (60 kW) each each



  • Maximum speed: 138 mph (222 km/h, 120 kn)
  • Climb time to 5,000 ft (1,500 m): 7 min


Aircrafttoaal encyclopedia

The company was established on 10 December 1939 by the armament company Oerlikon-Bührle, and construction of a new production building started in March 1940. The company was formed to do maintenance and repairs for the Swiss Air Force, the first work of the new company was assembly of EKW C-35 reconnaissance biplanes from spare parts, and overhaul work on other types