PURPOSE: To improve the comfortableness in cruising by automatically adjusting the pneumatic pressure of, especially, a cushion room, concerning an air cushion boat capable of high-speed navigation.
CONSTITUTION: This boat is provided, at the bottom, with a cushion room 2, the periphery of which is surrounded and which is opened downward, an intake means 5, which can supplies the same cushion room 2 with compressed air, an auxiliary air chamber 21, which is connected to the cushion room 2 through a communication part where an orifice 8 is made, and a means, which materializes the air inflow from the cushion chamber 2 to the auxiliary air chamber 21 easier than that from the auxiliary air chamber 21 to the cushion chamber 2. Hereby, the orifice 8 between the cushion chamber 2 and the auxiliary air chamber 21 gives damping, so the up and down motion attenuates sharply in the vicinity of the peculiar frequency of the up and down vibration of the hull, and besides, stiff sensation to the push up of high frequency lessens.
SAKAI FUMIKAZU
URASAKI TOSHIAKI
