1.

Technical Paper
Technical Paper
1. Flow Visualization and Flow Field Measurements of a 1/12 Scale Tilt Rotor Aircraft Aicraft in Hover
Coffen, Charles D. ; George, Albert R. ; Hardinge, Hal. ; Stevenson, Ryan.
Pub. info.: NASA Technical Reports.  (NASA-CR-189456),  pp.1-29,  1991.  National Aeronautics and Space Adminstration
2.

Technical Paper
Technical Paper
2. PREDICTION OF XV-15 TILT ROTOR DISCRETE FREQUENCY AEROACOUSTIC NOISE WITH WOPWOP
Coffen, Charles D. ; George, Albert R.
Pub. info.: NASA Technical Reports.  (NASA-CR-187684),  pp.1-39,  1990.  National Aeronautics and Space Adminstration
3.

Technical Paper
Technical Paper
3. A Compatative Analysis of XV-15 Tiltrotor Hover Test Data and WOPWOP Predictions Incorporating the Fountain Effect
Rutledge, Charles K. ; Coffen, Charles D. ; George, Albert R.
Pub. info.: NASA Technical Reports.  (NASA-CR-189455),  pp.1-29,  1991.  National Aeronautics and Space Adminstration