"Aerodynamics." . . "Rotor aerodynamics." . . "Drops (liquids)." . . . . "NASA Glenn Research Center," . . "Fundamental Aeronautics Program (U.S.)," . . "Transmissions (machine elements)." . . "Computational fluid dynamics." . . "High fidelity computational fluid dynamics analysis and validation of rotorcraft gearbox aerodynamics under operational and oil-out conditions"@en . . . . . . . . "High fidelity CFD analysis and validation of rotorcraft gearbox aerodynamics under operational and oil-out conditions : final report"@en . . . . . . "Helicopters." . .