Military Wiki
The YE-5A prototype
Role Experimental stealth aircraft
Manufacturer Windecker Industries
First flight 1973
Retired 1985
Primary user United States Air Force
Number built 1
Developed from Windecker Eagle

The Windecker YE-5A was an experimental aircraft evaluated by the U.S. Air Force. It was an all-composite construction aircraft, based on the commercial single-engine, low-wing Windecker Eagle. The YE-5A, delivered in 1973, was used in tests relating to the radar detectability (commonly known as 'stealth') of composite aircraft. A single YE-5A (serial number 73-1653) was built. The YE-5A composite airframe benefited from the U.S. Army project and was shown to be difficult to detect using radar; however other components, including the metal engine, could be seen on radar. The YE-5A was destroyed in a crash during a classified project in 1985, and was replaced by a modified conventional civilian model Windecker Eagle (N4196G), to complete the project. This aircraft is disassembled and in storage in the United States Army Aviation Museum at Fort Rucker, Alabama.[1]

Project CADDO

The U.S. Air Force tests were preceded by tests of a nearly similar prototype, which was delivered to the U.S. Army in 1972. This aircraft was code-named CADDO and tested at Aberdeen Proving Ground. The U.S. Army acquired another Eagle in 1974, which was used for ballistic tests. The U.S. Army Eagle was also used in tests for the U.S. Air Force. Ultimately this aircraft (N803WR) was destroyed by a tornado in 1980.[2]

Specifications (YE-5A)

General characteristics

  • Crew: one pilot
  • Length: 28 ft 8 in (8.7 m)
  • Wingspan: 32 ft (9.8 m)
  • Height: 9 ft 6 in (2.9 m)
  • Wing area: ft² (m²)
  • Empty weight: 2,150 lb (975 kg)
  • Loaded weight: 3,400 lb (1,500 kg)
  • Max. takeoff weight: lb (kg)
  • Powerplant: 1 × Lycoming I0-540-G, 290 hp (216 kW)


  • Maximum speed: 210 mph at sea level (338 km/h)
  • Cruise speed: 204 mph 75% power (328 km/h)
  • Stall speed: 66 mph flaps down (106 km/h)
  • Range: 1,100 miles (1,770 km)
  • Service ceiling: 8,000 ft (5,500 m)
  • Rate of climb: 1,220 ft/min (6 m/s)
  • Wing loading: 19.3 lb/ft² (kg/m²)
  • Power/mass: 0.09 hp/lb (0.14 kW/kg)


  1. [1] Eagle Behind the Curtain. Accessed 2011-12-31.
  2. [2] Eagle Behind the Curtain. Accessed 2011-12-31.

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