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Three-Engine Two-Fan Navy Multimission V/STOL Aircraft Considerations
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1975 by SAE International in United States
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A three-engine, two-fan arrangement for an advanced vertical and short takeoff and landing (V/STOL) lift/cruise multimission aircraft has many advantages.
With three engines, sufficient engine-out thrust is available for safe operation, over the range of multimission emergency landing requirements. The flexibility offered by being able to shut down one engine for loiter and cruise results in a fuel-conserving aircraft. The capability to add the power of the third engine provides a high-speed vehicle when the mission requires.
A two-fan system with fans under each wing provides for smooth transition from vertical flight to forward flight and return. Minimum-distance STOL performance is achievable because all of the thrust is available to accelerate the aircraft during the takeoff ground roll and to interact with the wing during climbout.. In shaft-driven systems, clutching horsepower can be drastically reduced or eliminated. Fans can be made interchangeable. Maximum fuselage volume is available for payload and operational systems components. Wing-mounted pod arrangements provide good compatibility with such passenger-carrying configurations as vertical onboard delivery (VOD) and commercial aircraft.
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CitationFord, J., "Three-Engine Two-Fan Navy Multimission V/STOL Aircraft Considerations," SAE Technical Paper 751104, 1975, https://doi.org/10.4271/751104.
- “V/STOL Lift and Lift/Cruise Fan Systems Parametric Data,” Hamilton Standard Division of United Technologies
- “STOL Technology - A Conference Held at Ames Research Center, Moffett Field, California, October 17-19, 1972,” NASA
- Sharon A.D. “Vectored Thrust Induced Lift Effects for Several Ejector Exhaust Locations on a V/STOL Wind Tunnel Model at Forward Speed,” NASA CR-137733 August 1975 Los Angeles Aircraft Division, Rockwell International Corporation
- “Aircrew Station Vision Requirements for Military Aircraft,” 8 June 1967
- Cavage Robert L. Chaloff David Renselaer Dirk J. et al “Design Definition Study of NASA/Navy Lift/Cruise Fan V/STOL Aircraft,” NASA CR-137695 September 1975