Radio controlled yacht and sail for the latter

Details Radio controlled yacht and sail for the latter Radio controlled yacht and sail for the latter

1983-11-25

1985-11-05

Yu, Mickey

Amusement devices: toys

Aquatic

Including remote control means or tether

114144A, A64H 2304

Patent

active

045511136

ABSTRACT:
An improved radio controlled yacht of the type including servo motors, a battery and a receiver mounted thereon is disclosed, wherein the yacht is adapted to sail on water by itself under the influence of natural wind force while the extent of swing of its sail and the angle of turning of a rudder are controlled in response to signals transmitted from a sender. A sail servo for controlling the extent of swing of the sail includes an output shaft to which a sail trimmer is fixedly secured and sheets are inserted through holes which are formed on the end part of the sail trimmer. One end of the sheet is attached to a boom of the sail, whereas the other end of the sheet extends in the direction of the boom and it is anchored at a predetermined position located on the deck. As the sail trimmer is rotated, the end part of the sail trimmer functions in the same manner as a fall block whereby the amount of lengthening and shortening of the sail is amplified two times as much as the displacement of the end part of the sail trimmer. Thus, a small amount of rotation of the sail trimmer leads to a large amount of lengthening and shortening of the sail whereby the radio controlled yacht can be designed and constructed in smaller dimensions and with a lighter weight while it has an appearance dimensioned in an exactly reduced scale relative to a real yacht.
An improved sail for the radio controlled yacht made of a flexible film of synthetic resin is disclosed according to another aspect of the invention. In particular, the main sail has a luff which is designed in the convexly bent configuration. Design of the main sail made in that way is intended to form a loosened portion in the vicinity of the luff after a mast is inserted through the cylindrical hole on the luff. When the main sail is filled with wind, the main sail assumes a curved cross-sectional configuration similar to an aerofoil owing to the existence of the loosened portion whereby high propulsive force is generated while the main sail has an appearance very similar to that of a real yacht.

REFERENCES:
patent: 1859557 (1932-05-01), Edgar
patent: 3280501 (1966-10-01), Hornbostel
patent: 3765362 (1973-10-01), Gitchel
patent: 4190980 (1980-03-01), Grycel

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