The use of model-test data for predicting full-scale ACV resistance
Abstract
The paper summarizes the analysis of test data obtained with a 1/12-scale model of the Amphibious Assault Landing Craft (AALC) JEFF(B). The analysis was conducted with the objective of improving the accuracy of drag predictions for a JEFF(B)-type air-cushion vehicle (ACV). Model test results, scaled to full-scale, are compared with full-scale drag obtained in various sea states during JEFF(B) trials. From the results of this comparison, it is found that the Froude-scale model rough-water drag data is consistently greater than full-scale derived drag, and is a function of both wave height and craft forward speed. Results are presented indicating that Froude scaling model data obtained in calm water also causes an over-prediction of calm-water drag at full-scale. An empirical correction that was developed for use on a JEFF(B)-type craft is discussed.
- Publication:
-
1985 Joint International Conference on Air Cushion Technology
- Pub Date:
- 1985
- Bibcode:
- 1985act..conf...67F
- Keywords:
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- Full Scale Tests;
- Ground Effect Machines;
- Water Vehicles;
- Water Waves;
- Drag;
- Performance Tests;
- Skirts;
- Engineering (General)