THE DESIGN OF SINGLE-PROPELLER AIR CUSHION VEHICLE CONTROL CONFIGURATIONS.
GENERAL DYNAMICS CORP GROTON CONN ELECTRIC BOAT DIV
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If the main thrust propeller is mounted on a rotatable pylon and is located slightly in front of the center of gravity, it can be combined with any adequate yaw-generating devices for excellent maneuvering control. Three yaw controllers produce quick turning response on the vehicle as well as allowing full use of the available side force. When a small additional propeller, either variable-pitch or rotatable, is used, sufficient yaw moment can be generated with a low horsepower engine. Roll control should be combined with each of the configurations. When roll is usable, it provides a significant additional side force. Side air jets can be used for yaw control but detailed tests must be performed to determine the effect of their use on the vehicle height and roll angle. The single-forward-thrust-propeller vehicle can be designed so that it is superior in maneuverability to the vehicle with two thrust propellers aft. The general conclusion is that an extremely maneuverable single-propeller vehicle can be designed if the main thrust propeller is located close to the c.g.. If it is any distance behind the c.g., maneuverability decreases. With the propeller at or slightly in front of the center of gravity, control is excellent. Author
- Surface Effect Vehicles and Amphibious Vehicles