Bell-Boeing MV-22B Osprey test aircraft No. 8, Bureau Number 164940, was one of four Engineering and Manufacturing Development test aircraft and the eighth Osprey built. Manufactured in Philadelphia, Pennsylvania, and Arlington, Texas, it made its first flight on 23 August 1997 in Arlington and, after shakedown and envelope expansion flights, was ferried to Patuxent River on 13 September 1997. It then spent its entire 20-year life as a dedicated test and evaluation aircraft, heavily instrumented for the extensive flight test program at Naval Air Station Patuxent River and other sites around the United States. Known to the test team as “Eight-ball,” it carried more than 1,300 analog instrumentation sensors, including strain gauges, accelerometers, and pressure and temperature gauges, along with onboard data recording and inflight real-time telemetry to ground stations, helping engineers analyze aircraft and propulsion system loads, stresses, strains, and performance in many flight conditions. The aircraft demonstrated a maximum airspeed of 354 knots and took part in testing that included high angles of attack, buffet, aerial refueling, cold weather operations, external loads, structural landings, formation flight wake interaction with another V-22’s rotor super vortex, and the definition of the Height-Velocity diagram for V-22s. It was the first V-22 to demonstrate most high-risk in-flight profiles, including defensive combat maneuvers and a 360-degree aileron roll. Its final flight was on 3 August 2018. By 2019, more than 350 V-22 vertical takeoff and landing aircraft in service had accumulated more than 450,000 flight hours across a broad spectrum of missions over the previous 30 years, using a unique tiltrotor design that allowed them to take off and land like a helicopter and fly like a propeller-driven aircraft.

Photo: Devry Becker Jones

Photo: Devry Becker Jones

Drum Point, Maryland · USA