DEVELOPMENT CHARACTERISTICS FOR TRACKED AMPHIBIAN PERSONNEL AND CARGO CARRIER BY HYDRONAUTICS, INC. (SUPPLEMENTAL INFORMATION).
PACIFIC CAR AND FOUNDRY CO RENTON WASH
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Investigations were directed toward reducing the hull resistance, and increasing the propulsive efficiency of propelling means of a generalized, barge-form, track-laying vehicle, with a minimum of restrictive conditions placed on their method of attaining the ends. When compared with the basic model, the bow change reduced the resistance at 7 MPH by 50, while the modified 5 foot transom stern alone gave a 25 reduction. Other changes such as the hydrofoil wave-depressor and side blisters indicated incremental reductions of 5 when tested separately, however, the savings were not accumulative. Use of the tracks for water propulsion has so many advantages for LVTs as to virtually preculde other mans from consideration. The main disadvantage of its poor efficiency is excessive fuel consumption. The potential of the return track as the pumping element of a jet propulsion system can only be realized by development of an efficient diffuser within the sponson-return track space or close-coupling the track paddles to the hydrovanes. The value of this system warrants prompt investigation. Author