System for controlling an air cushion vehicle by propeller towers and a propeller tower

A system for controlling an air cushion vehicle (400) by propeller towers (401-404), wherein a first propeller tower (401) and a second propeller tower (402) are located in proximity to the bow (405) of the air cushion vehicle, a third propeller tower (403) and a fourth propeller tower (404) are located in proximity to the stern (406) of the air cushion vehicle, the first propeller tower and the third propeller tower are located in proximity to a first side wall (407) of the air cushion vehicle, the second propeller tower and the fourth propeller tower are located in proximity to a second side wall (408) of the air cushion vehicle, and the first side wall defines a first side (409) relative to the air cushion vehicle,

• the system including propellers (411-414) for moving the air cushion vehicle, including a first propeller (411) for the first propeller tower (401), a second propeller (412) for the second propeller tower (402), a third propeller (413) for the third propeller tower (403), and a fourth propeller (414) for the fourth propeller tower (404), and
• mounting seats (421-424) for mounting the propeller towers to the air cushion vehicle, a first mounting seat (421) for the first propeller tower, a second mounting seat (422) for the second propeller tower, a third mounting seat (423) for the third propeller tower, and a fourth mounting seat (424) for the fourth propeller tower, such that the first mounting seat is rotatable at a first pivot point (431), the second mounting seat is rotatable at a second pivot point (432), the third mounting seat is rotatable at a third pivot point (433), and the fourth mounting seat is rotatable at a fourth pivot point (434) relative to the air cushion vehicle,
• characterized in that in the system,
• an edge portion (442) located closest to the second side wall in the second mounting seat is located closer to the ground than an opposite edge portion (446) in relation to the second pivot point in the second mounting seat, providing a tilt (450) of the second propeller in response to rotation of the second mounting seat at the second pivot point, and in response to the rotation of the second mounting seat,
• the second propeller tower directs a second air flow (452) produced with the second propeller over the second side wall of the air cushion vehicle and, due to the tilt of the second propeller, partly downwardly relative to a horizontal plane defined by the ground, the second air flow exerting a second force (462) that lifts the second side wall of the air cushion vehicle upwardly from the ground.