Patent
Methods and apparatus for aerodynamic and hydrodynamic drag reduction and attitude control for high speed boats
TLDR
In this paper, the authors present methods and apparatus for reducing sinkage and wetted surface, and thus hydrodynamic drag of a high speed boat through the generation of aerodynamic lift while decreasing overall aerodynamic drag.Abstract:
The present invention provides methods and apparatus for reducing sinkage and wetted surface, and thus hydrodynamic drag of a high-speed boat through the generation of aerodynamic lift while decreasing overall aerodynamic drag. At least one lift-generating front wing proximate a bow section of the boat with at least one corresponding front air channel may be provided. At least one lift-generating rear wing proximate a transom section of the boat with at least one corresponding rear air channel may also be provided. At least one of the wings may be adjustable to generate aerodynamic lift with one of: (1) a neutral; (2) a transom-lifting; and (3) a bow-lifting pitching moment about a center of inertia of the boat. At least one wing proximate the leading edge of the tunnel of a multi-hull boat may be provided to increase the operational envelope.read more
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Auto tab control system
TL;DR: In this paper, a boat trim tab system having an automatic controller for positioning trim tabs to perform user selected preset functions or maintain previously used positions in response to real-time operating conditions is presented.
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Patent
Systems and methods for automatically controlling attitude of a marine vessel with trim devices
Steven J. Andrasko,Michael J. Lemancik,Steven M. Anschuetz,Andrew J. Przybyl,Daniel J. Balogh +4 more
TL;DR: In this article, a trim control system automatically determines trim angle of a marine propulsion device with respect to a vessel, based on a measured vessel speed and trim base profiles, each defining a unique relationship between vessel speeds and trim angles.
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Method and apparatus for controlling vehicle tractive effort
TL;DR: In this paper, a multi-wheeled vehicle employing an active aerodynamic control system is described, and a method for controlling the vehicle and the active control system includes determining states of parameters related to ride and handling of the vehicle, and determining a current tractive effort based upon the states of parameter related to the vehicle.
Patent
Systems and methods for providing notification regarding trim angle of a marine propulsion device
TL;DR: In this paper, a system for notifying an operator of a marine vessel that a marine propulsion device is not at an efficient trim angle includes a notification device and a controller that sends a signal to the notification device to provide a trim up notification when the controller determines that the marine propulsion devices is at the optimal trim angle.
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Patent
Planing boat hull
TL;DR: A planing hull has a conical contour extending from the bow portion to a stern portion having a flat surface on each side of the keel, a wide lip chine having a lip portion, and a transom separating the bow portions and the stern portion creating a step between the bow and the mid hull transom as discussed by the authors.
Patent
Reduced drag stable Vee bottom planing boat
TL;DR: In this article, a Vee bottom planing boat running chines dry at top speed is made to porpoise by trimming the drive when the boat is running at 70% to 100% of top speed.
Patent
Hull configuration for high speed boat
TL;DR: In this paper, a high speed planing hull is provided with multiple steps in the fore-and-aft direction in combination with variable dead rise from keel to chine in the steps.
Patent
Hydrodynamically and aerodynamically designed boat
TL;DR: A motor driven hydroplaning boat has a hull of symmetrical generally smooth surfaced configuration which converges towards an apex at a bow thereof and widens amidships to form a pair of laterally and downwardly extending wings.
Patent
High speed catamaran hull and boat
TL;DR: In this paper, a catamaran boat hull is described, which comprises a boat hull structure having an under surface, a curved bow and a generally flat stern, a pair of spaced-apart sponsons on either side of the keel line of the hull and extending generally substantially from the bow to the stern.