Ships – Watercraft with means used in providing sailpower – Having specifically defined hull shape
Patent
1984-11-27
1986-07-08
Blix, Trygve M.
Ships
Watercraft with means used in providing sailpower
Having specifically defined hull shape
114 98, 114102, 114 61, B63H 904
Patent
active
045986584
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to sail boats and, more particularly, to arrangements used for controlling the spinnaker of sail catamarans.
DESCRIPTION OF THE PRIOR ART
Known in the art is an arrangement for controlling the spinnaker of a sail catamaran, comprising a spinnaker boom which is hinged by its one end portion to the mast, the hinge allowing for a free turn of the spinnaker boom both in the vertical and horizontal planes. Fastened to the spinnaker boom by one end is its halyard whose other end is passed through a block on the mast and is brought out to a stopper. Also fastened to the spinnaker boom is a lower stay whose free end is brought out to its stopper disposed near the mast lower end portion. The spinnaker is secured by its tack to the front (free) end of the spinnaker boom. The brace and the sheet of the spinnaker are each brought out to its stopper. (cf. "Boats and Yachts", No. 4 (68), 1977, pp. 41, 51 and 84, "Sudostroenye" Publishing House).
In order to provide for the required stagger of the tack of the spinnaker, the spinnaker boom in the above arrangement is made of a relatively great length, which results in an increased total weight of the catamaran and a higher cost of manufacture. Besides, during tacking the spinnaker boom of this type has to be disconnected from the mast and passed through under the forestay, and, with the spinnaker furled, the spinnaker has to be removed so that it would not interfere with the operation of the other front sails. All this consumes a considerable amount of time required for setting and furling the spinnaker.
SUMMARY OF THE INVENTION
The present invention has as one of its purposes the provision of an arrangement for controlling the spinnaker of a sail catamaran, in which the spinnaker boom would be mounted on the catamaran in such a manner that it would make it possible to decrease the weight and cost of fabrication of the catamaran, as well as to reduce the time necessary for setting and furling the spinnaker.
The above task is accomplished by an arrangement for controlling the spinnaker of a sailboat having two hulls joined by beams, comprising a spinnaker boom having the spinnaker and one end of the halyard fastened to the front end thereof, the other end of the halyard being fastened to the mast, and a lower stay secured by one end to the front end of the spinnaker boom and by its other end to a stopper. According to the invention, the front beam joining the hulls supports an upright, the spinnaker boom is hinged to the upper end of the upright, and provision is made of two stays of which each is secured by one end to the upper end of the upright and by its other end to the bow of a respective hull.
It is feasible to provide the arrangement with an additional lower stay which would be fastened by one end to the front end of the spinnaker boom and by its other end to its stopper, each lower stay being brought out to its stopper via a block secured to the bow of a respective hull of the catamaran.
This constructive embodiment makes it possible to substitute on the spinnaker boom the spinnaker with the foresail and to comfortably control the position of its tack.
It is possible to mount a block on the free end of the spinnaker boom, to pass the end of the halyard through the block and to secure it to the stopper mounted on the spinnaker boom.
This constructive embodiment allows a decrease in the total length of the halyard and, consequently, the air resistance.
The arrangement for controlling the spinnaker of a sail catamaran, built in accordance with the present invention, makes it possible to decrease the weight and the cost of fabrication of the catamaran owing to a smaller length of the spinnaker boom. Besides, the arrangement allows a reduction of the time required for setting and furling the spinnaker and to make it easier to change the tack.
BRIEF DESCRIPTION OF THE DRAWINGS
The following description of a specific embodiment of the present invention is given with reference to the accompanying drawings, in
REFERENCES:
patent: 795025 (1905-07-01), Collins
patent: 3157149 (1964-11-01), Manchester
patent: 3185121 (1965-05-01), Nilsen
patent: 3207114 (1965-09-01), Moseley
patent: 3438349 (1969-04-01), Curtis et al.
patent: 3464379 (1969-09-01), Lawson
patent: 4022144 (1977-05-01), Gitchel
patent: 4102289 (1978-07-01), Ebbeson
patent: 4108100 (1978-08-01), Jamieson
patent: 4164193 (1979-08-01), Smith
patent: 4292910 (1981-10-01), Hoyt
patent: 4345535 (1982-08-01), Ross
"Boats and Yachts", No. 4 (6A), 1977, pp. 41, 51 and 84, Sudostroenye Publishing House.
Blix Trygve M.
Swinehart Edwin L.
Tsarnikavsky Rybolovetsky Kolkhoz "Tsarnikava"
LandOfFree
Arrangement for controlling the spinnaker of a sail catamaran does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement for controlling the spinnaker of a sail catamaran, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for controlling the spinnaker of a sail catamaran will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1445939