PROGRAM FOR REDUCTION OF HYDRO-SKIMMER POWER REQUIREMENTS
PHILCO NEWPORT BEACH CA AERONUTRONIC DIV
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An experimental program for the development of a flexible flap for hydroskimmer type vehicles is described. A successful flexible flap configuration was developed. Calculations indicate that power requirements may be reduced by a factor of about 3 to 1.5 on a typical hydroskimmer vehicle operating at 60 knots. Data from a large-scale, two-dimensional model over a flat ground plane show that rigid flaps that extend both sides of the jets provide a substantial power saving over an unflapped model of otherwise identical configuration. Tests with various ratios of inner to outer flap length show that little performance is gained through the use of inner flaps. Dynamic tests of a series of different flexible flaps attached to the above model, but with the model mounted over a moving wave train, have demonstrated that a successful flexible flap configuration can be constructed. The power requirements of a typical hydroskimmer vehicle operating in two different sea states are predicted both with and without flaps.
- Surface Effect Vehicles and Amphibious Vehicles