AN ANALYSIS OF THE RESULTS OF WIND TUNNEL TESTS ON A CIRCULAR MODEL GROUND EFFECT MACHINE,
Abstract
Analysis is presented of the results of wind tunnel tests on a circular model ground effect machine. Lift, drag and pitching moment were measured on a model GEM, 6 inches in diameter with a very thin annular jet, at wind speeds ranging from 65 to 185 feet per second and jet pressure ratios (P/P sub t) ranging from 0.9 to 0.3. Models were held at zero incidence to the ground board and the height above the ground board was varied over a wide range. The report presented values of the lift coefficient ( C sub L) plotted against the jet momentum coefficient (C sub micron) with the drag coefficient (C sub D) and pitching moment coefficient plotted against C sub L. In this form the significance of the data is not readily apparent and so, in this analysis, it is preferred to replot the data in the forms suggested. The meaning of the results is then much more easily adduced.(Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1963
- Accession Number
- AD0416230
Entities
People
- Norman K. Walker
- Robert J. Neal