296 H. R. Chaplin 
REFERENCES 
Air Curtain 
[1] Von Glahn, U.H., “Exploratory Study of Ground Proximity Effects on Thrust of Annular 
and Circular Nozzles,” Washington, National Advisory Committee for Aeronautics 
TN 3982, Apr. 1957 
[2] Chaplin, H.R., “Theory of the Annular Nozzle in Proximity to the Ground,” David Taylor 
Model Basin Aero Report 923, July 1957 
[3] Crewe, P.R., and Eggington, W.J., “The Hovercraft —A New Concept in Maritime Trans- 
port,” London, The Royal Institution of Naval Architects, Nov. 1959 
[4] Chaplin, H.R., “Ground Cushion Research at the David Taylor Model Basin —A Brief 
Summary of Progress to Date,” Presented at Princeton Univ. Symposium on Ground 
Effect Phenomena, Oct. 21-23, 1959 
[5] Johnson, A.E., “Wind Tunnel Investigation of DTMB GEM Model 448,” David Taylor 
Model Basin (In preparation) 
[6] Cathers, D., Hirsch, A.A., and Walker, W., “Air Pressure Levitation,” Paper presented 
at the Feb. 1960 meeting of the Chesapeake Section of the Society of Naval Architects _ 
and Marine Engineers, Washington, 1960 
[7] Hirsch, A.A., “The Hovering Performance of a Two-Dimensional Ground Effect Machine 
Over Water,” Presented at Princeton Univ. Symposium on Ground Effect Phenomena, 
Oct. 21-23, 1959 
Water Curtain 
[8] DeVault, R.T., “Introduction to the Hughes Hydrostreak Concept,” Culver City, Calif., 
Hughes Aircraft Co. Report X-424, Nov. 1959 
Plenum 
[9] Dobson, F.A., “The Airlifter,” Dobson Aircraft Corp., Whittier Calif., Dec. 1957 
[10] Wright, E., “The Effect of Configuration on the Lift of a Two-Dimensional Open Plenum 
Ground Effect Machine,” Princeton Univ. Report 516, May 1960 
Ram Wing 
[11] Kaario, T.J., “The Principles of Ground Effect Vehicles,” Presented at Princeton 
Univ. Symposium on Ground Effect Phenomena, Oct. 21-23, 1959 
Diffuser-Recirculation 
[12] Gates, M.F., and Sargent, E.R., “Development of a Unique GEM Concept With Potential 
for Achieving Efficient Forward Flight,” Presented at Princeton Univ. Symposium on 
Ground Effect Phenomena, Oct. 21-23, 1959 
