PIVOT WING SAILING/FLYING APPARATUS

Abstract: Pivot wing sailing/flying apparatus (10) including a hull support (12) for a mast (20) connected pivotally by a universal joint (25) or rigidly without. A boom (30) is connected pivotally to the other end of the mast (20) by a universal joint (27) or by a single axis pivot. A sail assembly (40) is supported by the boom (30) and includes a symmetrical sail (42) with an airfoil shape. A control assembly (50) is connected to boom (30) and sail assembly (40) to enable sail assembly (40) to enable mode of operation. When in a sailing mode of operation, the top pivot action of the sail assembly (40) can be controlled by a hook mechanism (112) enabling the apparatus to be controlled like a typical sailboard with the sail rig supported by the mast. Upon disengaging of the sail assembly from the mast, the sail assembly can be pivoted along its top longitudinal axis to facilitate a turn or flight. Craft equipped with the apparatus can be used for transport over water, snow, ice and land.

Description: PIVOT WING SAILING/FLYING APPARATUS BACKGROUND OF THE INVENTION Field of the Invention This invention relates to the field of wind propulsion for transport over water, snow, ice, and land. Description of the Prior Art In recent years the sport of boardsailing or windsurfing has become very popular. Generally speaking, a sailboard is a freesail system which incorporates a non-symmetrical sail rig which is attached at its mast base to a surfboard by means of a universal joint. The sail rig is supported by the sailor who holds on to a two-sided wishbone shape curved control boom. When on a predetermined tack the sailor is able to manipulate the sail sufficiently to propel himself on the board across the surface of the water. The typical boardsailing device of this type is described in U.S. Patent No. 3,487,800. The disadvantage, with this type of sailing device is that the sailor must stop all sailing action and walk around the front of the mast while sheeting in to perform a simple tack maneuver requiring turining up wind. Similarly, for a downwind turn referred to as a jibe, the sailor must release hold of the boom, dump the propelling wind out of the sail and rotate the sail a full 360 degrees around the bow of the board before grabbing the other side of the boom and sheeting in all over again. It will be appreciated that this type of maneuver can be quite troublesome and time consuming when performed on long and especially short surf boards. In addition, typical sailboards are further limited from flight above the water due to the aerodynamically unstable design of their non-symmetrical sail rigs. Still another type of sailboard bringing the sailor slightly more freedom of movement and sail direction control is a sailing rig that is a fixed triangular sail connected to a board by angular support bars as described in U.S. Patent No. 3,455,261.It has been found however that this type of sailing rig is limited by the lack of a universal joint connecting the sail rig to the board. Furthermore, the sail design is ineffecient because it employs no rigid airfoil shape and it makes rigging for changing wind and sailing conditions a costly and time consuming task. Still another type of sail rig device is referred to as the Wing Sail as described in U.S. Patent No. 4,369,724. The Wing Sail is a reversing sail which can be sailed forwards or backwards without turning it around. However, the Wing Sail must create its own billow to propell itself along. Also, as in the prior devices for propulsion, controllable flight is ruled out by non-symmetrical sail design, and the sail area cannot be changed for varying wind and sailing conditions without additional cost and time. In addition to the above described U.S. Patents there are a number of foreign patents, namely U.K.Patent No. 2,122,561 and French patents Nos. 8,101,401; 8,104,874? 8,206,114; 8,275,399 and 8,300,128 which show airfoil sails mounted by swivel and universal pivots to the upper ends of upstanding masts which, in turn are pivotally connected to the hull or board. These prior art devices do not teach a front jib or a fast fold up arrangement for the sail rig or stabilizers for the top universal joint or the control and support assembly or the sail tip angle support and tip twist restraint or use of control lines enableing their application to sailing vessels with fixed masts taught by the present inventors. SUMMARY OF THE INVENTION The present invention improves over the existing sailboard rig designs in freedom, handling, performance, and versatility by providing a unique sail design and control means which allows it to be universally or hinge mounted onto both sailing vessels having universally mounted masts and sailing craft having fixed masts. Its design enables complete directional changes to be facilitated with-in the apparatus with a minimum of time and effort. Thus the sailor is able to keep the wind propelling the craft over water or the like throughout a turn without the need for. walking around on deck. The lower end of the mast may be fixed or universally mounted onto the craft. At the upper end of the mast, a universal joint or single axis hinge connects the mast to the joint or single axis hinge connects the mast to the boom. The boom supports the sail assembly. The sailor handles a control apparatus which includes longitudinal handle support members connected at one end to sail support members of the sail assembly and at the other end to a sleeve member encircling the boom. With a universal joint applied at mast top the sailor can pivot the sail on a first axis which is for the sailing position or alternatively along a second axis which is used for a flying position. When a single axis hinge is used, however, pivot along the second axis is sacrificed in order to gain a more controlled pivot action. In the case of both types of mast to boom connections, a longitudinal sail pivot of 90 to 180 degrees leaves the leading edge facing in the opposite direction thus completing a track or jibe. When in the position for sailing, the pivot motion can be arrested by the use of a hook mechanism which operatively engages the sail to the mast. Alternatively, upon disengaging the sail rig from the mast, the sail can be moved into a horizontal position to create a vertical lifting force which enables craft and sailor to fly above water or land. With enough forward momentum of perhaps the help of a wave to jump, the sailor can hold the sail in a horizontal position as he heads into the wind. Like a flying fish, the craft is able to soar dynamically by transforming its speed on water or land into lift into the air. Once airborne, the apparatus controls much like a hang glider. Pitch, roll, and yaw adjustments are made possible with weight shifts by the sailor/aviator. The invention can be used on water craft, snow and ice boots, and wheeled and non-wheeled land craft. A second embodiment of the invention is the unique design of the sail assembly and the control thereof. The sail has an airfoil shape formed into it so that when in the flying mode position the lower windward layer follows a different camber line than the upper leeward layer. The * lower surface may be extended to the trailing edge of the top surface to produce a more complete three dimensional wing section. The sail shape can be altered by changing the shape of the chord members which form it, thus different foils with different characteristics may be created within the same sail rig. Through design, shifting sail billow and control assemblies on both sides of the sail are unnecessary. The sail assembly is releasably secured by a locking pin member to the boom enabling the sail assembly to be collapsed compactly when the locking pin member is removed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a prospective view of the pivot wing sailing/flying apparatus according to its application on a sailboard; Figs. 1A, IB, and 1C are partial prospective views of apparatus similar to that shown in Fig. 1 adapted for land, ice, and show respectively; Fig. 2 is a side elevational view of the apparatus; Fig. 3 is an end elevational view of the apparatus; Fig. 4 is a partial exploded view of the sail assembly illustrating certain details thereof; Fig. 5 is a partial prospective view of the support and control assembly illustrating certain details thereof; Fig. 6 is a top elevational view of the apparatus with certain parts in section to illustrate certain details thereof; Fig. 7 is and exploded plan view of the hook mechanism with certain parts in section to illustrate certain details thereof; Fig. 8 is a side elevational view of sail assembly illustrating a second embodiment thereof including a jib sail; Fig. 9 is a sectional view of taken along lines 9-9 of Fig. 8. Fig. 10 is a rear schematic view of another embodiment of the invention a catamaran using cable control lines for the sail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to Figs . 1 through 5 of the invention there is shown the pivot wing sailing/flying apparatus 10 according to the invention including a hull or body member 12 supporting a sailor for movement over the water. It will be appreciated that hull or body member 12 is for movement over land, ice, or snow as depicted by the embodiments of the Figs. 1A-1C, respectively. In the embodiment of Fig. 1A hull member 12 includes wheels 13a for transport across land. Similarly in the embodiments of Figs. IB and 1C, the hull member 12 includes a skate element 13b and a ski element 13c, respectively. Apparatus 10 includes an upstanding tubular mast member 20 connected by its lower end to the central portion of the member 12 by means of a universal joint 25 which is well known by those skilled in the art. It will be appreciated that the tubular mast member 20 may also be rigidly mounted to the hull member 12 especially in the case of large vessel applications. At the opposite or upper end of the tubular mast member 20 is a second universal joint 27. The upper end of the mast member 20 carries a longitudinally extending tubula * boom member 30. Boom member 30 is clamped by a sleeve 32 connected to universal joint or hinge 27, to enable rake angls adjustment by sliding movement between mast member 20 and boom member 30 as well as universal or hinge action between the two members. A sail assembly 40 supported by the boom member 30 serves to catch wind to propel and lift the hull member 12 by the sailor controlling a control assembly 50 as will become more apparent, hereinafter. By moving the sail assembly 40 to a horizontal position on a first axis the apparatus 10 assumes the lifting or flying mode of operation. By moving the sail assembly 40 vertically to a second axis or the axis of the mast member the apparatus 10 assumes the tacking position associated with sailing. In this vertical position, the swivel connection at mast base allows the sail assembly 40 to twist on this lower axis to a desired angle of attack. Sail assembly 40 includes a sail made of any suitable furlable material such as dacron. The sail 42 is folded over support members 44 and 46 (Fig. 5) to create a two sided sail with a double surface 42 a which may be extended to meet the trailing edge of the top surface to create a more complete and efficient foil. Sail 42 is symmetrical in shape from tip to tip. Formed in sail member 42 are pockets 48 that receive chord member 49 that extend fore and aft in generally parallel fashion. It will be noted that sail member 42 assumes an airfoil shape due to the configuration of the chord members. This airfoil shape may be changed to meet different sailing conditions by altering the shape of the chord members 49. The chord members 49 are secured to the trailing edge of the sail member 42 by tying line 62 through grommets 63 and the slotted end 64 of the chord member 49 (Fig. 4) . These chord members 49 are removed to facilitate compact fold up. The sail member 42 is supported by and is also collapsible on the boom member 30 in an umbrella fashion. Sail support members 44 and 46 are connected to the boom member by plate members 66 that are secured to the boom member 30 by a locking pin member 71 that is inserted into an opening 73 to lock the sail assembly to the boom member. the sail assembly to the boom member. Upon removal of the pin member 71 tubular sleeve member 69 can slide relative to boom member 30. By this structure sail support members 44 and 46 can pivot on the axis of bolts 68 enabling the sail member to fold compactly in umbrella fashion along the boom member 30. Desirably the sail support members extend at a nose angle that ranges from about 25° to about 180°. Front support for the sail member is provided by front support cables 75 and 77 connected to the sail support members 44 and 46, respectively, and to the boom member 30 via adjustment couplings 78 and 79, respectively. Rear support for the sail member is provided by the adjustable rear support cables 105 and 107 which extend between members 91 and 92 and sail members 44 and 46, respectively. Additional reinforcement of the sail and control of tip twist is provided by angle support members 81 that extend at an angle from the support members and engage sail member 42 at the corners of the upper and lower ends or tips thereof. By attaching these angle support members 81 to the rear support cables 105 and 107 at their point on intersection, the angle support members 81 are stabilized. At the most rearward portion of the sail member 42 is a line 85 for each sail surface which is secured to the boom member 30 in any suitable manner for the purpose of drawing the sail member taut when the sail member is in the extended position. To provide mast member to boom member support, a pair of stabilizing cables 86 and 87 are used to restrict the pivot action of the mast top universal joint to one longitudinal axis of pivot for increased ease of control. Each stabilizing cable 86 and 87 is adjustable by means of a coupling or turnbuckle 88 and 89. By this structure there is provided an adjustment yet stabilized rake angle between mast member and boom member. The control assembly 50 comprises longitudinal handle support members 91 and 92 connected at one end to the sail support members 44 and 46, respectively, by pivotal pin members 93 and 94 to enable relative pivotal movement therebetween. At the opposite end of the longitudinal support members are members 96 and 97 that are connected by pins 98 to again enable relative pivotal movement therebetween. Members 96 and 97 are connected to the boom member 30 by a tubular sleeve member 99. Sleeve member 99 enables rotation of the control assembly on the axis of the boom member 30 and permits sliding movement of control assembly along the axis of the boom member to suit sailing conditions. Connected at right angles to the members 91, 92 is a cross member 100 that is connected by sliding support plates 101 and pin members 103 so that its location along members 91, 92 is adjustable. Tubular sleeve members 102, made of suitable material, are used to cover members 91, 92, 96, 97, and 100 to provide better gripping of the control assembly by the sailor. Cross member 100 may be substituted for by a cross wire to enhance quick fold up without affecting structural stability. It will now be appreciated how the sailor controls the movement of the hull 12 by balancing the control assembly 50 in his hands. Due to the universal connection between sail assembly and hull, the apparatus is enabled all axis of pivot associated with typical sailboard systems, including fore to aft pivot, leeward to windward pivot, vertical axis swivel to adjust angle of attack, and any combinations therebetween. By virtue of the airfoil sail shape, the sailor can make efficient forward progress on all courses relative to wind propelled sailing. The second mast top universal joint 27 allows sail pivot along the vertical axis or that of the mast member 20, up and down pitch adjustment or pivot along the latitudinal or transverse axis, yaw adjustment or pivot along the horizontal axis, roll reversal or pivot along the longitudinal axis of the boom member, and any combinations therebetween. In addition, simultaneous interaction between top and bottom universals as universal joints 25 and 27 enables infinite freedom of sail positioning. A simple roll reversal or pivot along the mast top longitudinal axis is all that is required to perform sailing turns (tacks and jibes) , thereby allowing the apparatus to be rigidly mounted to a 12 hull at mast base of mast members. Similarly, a single longitudinal axis hinge may be substituted in place of the top universal joint 27 to allow simplification and greater control. A mast top longitudinal pivot of any degree causes the sail to gain a vertical lifting component to help lighten the weight of the hull 12 in the water. In addition, the sailor can pivot the sail assembly 40 to a horizontal position to assume a lift or flying mcle of operation. Due to the symmetrical shape of the sail assembly 40, there is uniform lifting of the apparatus. It has been found that his flying position is effective for stabilizing the hull 12 from the up and down and side to side pitching action played upon it by swells and waves. Additionally, stabilized movement across the water can be obtained by positioning the sail at angles between vertical and horizontal, thus combining propulsion and lift. Furthermore, due to the unique airfoil configuration of the sail assembly 40 the sailor can determine when to change tacks and upon movement of the sail a. sembly change from one tack to another, into the wind or a aj from the wind, easily. The airfoil shape of the sails 42 of r.ail assembly 40 renders the apparatus immediately available for tacking without waiting for luffing and refilling the sail 42. Figs. 6 and 7 show details of the hooking mechanism 110 associated with control assembly 50. The hooking mechanism includes a pair of spaced plate members 112 secured to each of support members 91 and 92. By this structure the sailor can pivot and support the sail assembly 40 from the axis of the mast member 20 thereby simplifing sailing when in this mode of operation. It will be appreciated that the endurance of the sailor as well as the sailing control of member 42 is significantly effected by engaging the plate members with mast member 20. Additionally, it has been found that various other hooking mechanisms secured either to mast member 20 or to each support member 91 and 92 will accomplish the above said. Figs . 8 and 9 show another embodiment of the invention which includes a jib sail 115 in addition to the sail assembly 40. The jib sail is supported by front support cables 75 and 77 and can be attached in any suitable manner as by VELCRO attachment (not shown) . The jib sail 115 includes chord members 117 to form the airfoil shape desired. These chord members extend downward to rest on top of the sail member 42 to keep jib sail 115 and sail member 42 in proper position. It will be appreciated that jib sail 115 greatly enhances the control and maneuverability of the hull member 12 especially in light and varying conditions. Furthermore, jib sail 115 allows sail area to be quickly changed to match wind velocity and sailing conditions. Thus, the jib sail 115 serves as a turbo charger to force more air over the top surface of main sail member 42 increasing overall performance dramatically. In Figure 10 there is shown another embodiment of the invention that includes a catamaran 125 having one or more control lines 127 for pivoting the sail assembly on the axis of boom member 30. Roller members 130 are disposed athwartships to support and facilitate movement of the control wires 127 by the operator. It will be appreciated that the inclusion of control lines 127 eliminates the need for the usual control assembly 50. Thus, support cable 129 and support post 132 have been added to give support to the structure and allow for attachment of control lines 127. The embodiment of Fig. 10 demonstrates how the apparatus may be attached to sailing craft with fixed masts while the pivot wing concept remains the same. While the invention has been described with respect to particular illustrative embodiments variations and modifications can be made within the inventive concept without departing from the spirit of the invention as set forth in the claims .

Claims: WHAT IS CLAIMED IS: 1. Wind propelled apparatus comprising: a support member for supporting an operator; mast means having one end connected to said support member; boom means, including forward and aft ends, disposed at the other end of said mast means; pivot means on said other end of said mast means and connected to said boom means intermediate said forward and said aft ends of said boom means for pivotedly supporting said boom means for pivoting about generally a horizontal axis; sail means including a sail support means extending from said boom means at a position forward of said mast means and a sail member supported by said sail support members; control means including a pair of longitudinal extending handle support members spaced from said sail means, said handle support members being respectively disposed in spaced relationship to each other and spaced outwardly on opposite sides of said boom means, said handle support members also being connected to said sail means at positions rearwardly of said sail support members and rearwardly of said mast; said pivot member supporting said boom means for rotational movement about said boom means whereby an operator can cause said sail means to pivot to effect either a sailing or flying mode of operation as determined by the operator; said sail means being a transverse width that when positioned generally vertically in a sailing mode on either side of said boom, said sail means terminates above said support member and positions one of said handle support members adjacent to said mast, for arresting inward movement of the forward portion of said sail means toward said mast. 2. Apparatus according to Claim 1 wherein said support member is a deck of a hull for travel over water. 3. Apparatus according to Claim 1 wherein said support member includes skating means for travel over ice. 4. Apparatus according to Claim 1 wherein said support member includes roller means for travel over land. 5. Apparatus according to Claim 1 including means for releasably securing said sail support member to said boom means whereby said sail member can be collapsed along said boom means. 6. Apparatus according to Claim 1 wherein at least one of said longitudinal handle support members includes hook means connected thereto for engaging said mast means when in the sailing mode of operation. 7. Apparatus according to Claim 1 wherein said sailing member includes tying means on said sail member and removable chord members defining a predetermined airfoil shape, said chord members having outwardly opening slotted end portions for respectively receiving said tying means. 8. Apparatus according to Claim 1 including control wire means connected to said sail support members, said control wire means being supported on roller means disposed athwartships. 9. Apparatus according to Claim 1 including front support cable means extending between the forward end of said boom means and the distal ends of said sail support members. ^ g _ 10. Apparatus rear support according to Claim 1 including cable means extending between the distal ends of said longitudinal handle support member and the distal ends of said sail support member. 11. Apparatus according to Claim 1 wherein said sail means is symmetrical from tip to tip. 12. Apparatus according to Claim 9 including a jib sail means supported on said front support cable means, said jib sail means including removable chord members defining a predetermined shape, said chord members extending from said jib sail means to rest on top of said sail means. 13. Apparatus according to Claim 9 wherein sail tip twist is eliminated by said means of attachment of said angle support members to said rear support cable means. 14. Apparatus according to Claim 1 wherein nose angle formed by said sail support members vary from 25 degrees to 180 degrees. 15. Apparatus according to Claim 1 including stabi¬ lizing cable means for limiting pivotal movement between said mast means and said boom means to one longitudinal axis and allowing rake angle between said mast and boom means to be adjustable.

Inventors: CROWELL ROBERT LEE, MAGRUDER THOMAS ABBEY, CROWELL, ROBERT, LEE, MAGRUDER, THOMAS, ABBEY
Applicants: CROWELL ROBERT LEE, MAGRUDER THOMAS ABBEY, CROWELL, ROBERT, LEE, MAGRUDER, THOMAS, ABBEY
Application year: 1985
Main classification: B63B35
IPC codes: B63B35