Abstract:
A model stick plane featuring a new assembly of stick fuselage, nose and wing deck support; the nose related to a structure incorporated to the front end of the fuselage to be adapted with a power system and in a shape that varies depending on the type of the power system used; the wing deck support connecting the fuselage; and the wing deck related to a structure essentially provided in relation the hollowed loop structure close to where the center-of-gravity position of the stick fuselage.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention is related to an model stick plane, and more particularly, to one that overcomes problems of structural variation and its derived variation in angle of incidence of model airplanes while allowing cost reduction and improved production capacity due to that a single set of dies can be applied for the production of various fuselage assemblies of model airplane.  
       BACKGROUND OF THE INVENTION  
       [0002]     In terms of flying technology, the present invention taking the fact that model airplane features flying with or without motive force into consideration applies the field of air dynamics as the directional coordinates in the determination and calibration of thrust line to fend off with down thrust the longitudinal instability resulted from excessive climbing angle due to the speed of flying with power, and with the side thrust of the thrust line the lateral instability caused by, the torque of the propeller, thus to guide the model airplane for a reliable climbing. The down thrust line effects decreases along with the weakening of the power and then disappears upon the termination of power without causing interference to the function of stabilization provided by the tail during the entire process. Accordingly, the model airplane is allows to demonstrate its expected gliding results after the flying with power has turned into flying without power.  
         [0003]     To achieve the purpose, the present invention includes a hollowed loop frame support of the main wing deck incorporated with down thrust line technology to fully exploit dual advantages of stability and variability of the hollowed loop frame support to overcome once for all those problems of structural variation and its derived variation in angle of incidence among multiple types of model airplanes found with the prior art.  
         [0004]     On the aspect of production technology, the dual loop frame support for the wing deck and the sleeve assembly design for the fuselage of the present invention provides the unique function of cutting assembly and accumulation assembly to allow cost reduction and. improved production capacity since a single set of mold can be applied for the production of various fuselage assemblies of model airplane.  
       SUMMARY OF THE INVENTION  
       [0005]     The primary purpose of the present invention is to provide a model stick plane featuring a new assembly of stick fuselage, nose and wing deck support. The nose relates to a structure incorporated to the front end of the fuselage to be adapted with a power system and in a shape that varies depending on the type of the power system used. The wing deck support connecting the fuselage and the wing deck relates to a structure essentially provided in relation the hollowed loop structure close to where the center-of-gravity position of the stick fuselage. The stick fuselage, the nose and the wing deck support are respectively characterized as following deck:  
         [0006]     1. The body of the stick fuselage relates to a laterally provided H-beam integrated with a reinforcement of a continuous loop structure each disposed at the gaps on both sides of the H-beam. Both loop structures on both sides are staggered to fortify its capability of anti-curvature and twist stresses as illustrated in  FIG. 2  of the accompanying drawing deck.  
         [0007]     2. A spherical dual device is provided in the middle section of the nose for the assembly of thrust line of the power axis of the model airplane.  
         [0008]     3. The wing support having the dual loop structure as its basic configuration provides the functions of cutting assembly and accumulation assembly.  
         [0009]     The spherical dual device comprised of two parts, a socket  22  and a bearing  24  as illustrated in  FIG. 3  provides the direction adjustment assembly for the power axis for a variety of model airplanes. The assembly with an optimal angle is made depending on the individual model of the model airplane.  
         [0010]     The wing deck support as illustrated in  FIG. 6  are connected to both ends of a fuselage sleeve  35  by means of a dual loop structure  31  in cutaway. The dual loop structure  31  is essentially comprised of an upper hollowed loop structure and a lower hollowed loop structure connected to each other by means of joints from a rectangular support with their outer ends each disposed with a locking channel  34  of the wing deck support to be fastened to their matching facilities in symmetry on the wing deck support as illustrated in  FIG. 5 . The fuselage sleeve  35  relates to an insertion type of square tube having both ends connected to the dual loop structure  31  and also serves as the center-of-gravity position in relation to the wing deck support  36  for displacement and positioning purposes.  
         [0011]     The basic configuration of the dual loop structure may be applied to a biplane as illustrated in  FIG. 1  or to a monoplane when breaking into each a single loop structure  33  as illustrated in  FIG. 7 . The present invention by taking advantage of the variation of the dual loop structure allows the making of any and all indicative propeller airplanes in the history into a model or a toy.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]      FIG. 1  is a side view of a preferred embodiment of the present invention applied in a biplane.  
         [0013]      FIG. 2  is a side view showing the structure of the stick fuselage describing a basic configuration of a cross-sectional view of a lateral H-beam of the stick fuselage and its reinforcement in a continuous form.  
         [0014]      FIG. 3  is a side view showing a construction of a nose of the preferred embodiment of the present invention describing details and work process of a spherical dual device taking a nose operating on an elastic band as an example.  
         [0015]      FIG. 4  is a schematic view of another preferred embodiment of the present invention providing the supplementary explanation for a nose operating on a motor.  
         [0016]      FIG. 5  is a front view of the present invention showing in conjunction with the side view the dual loop structure of the wing deck support of the present invention that the dual loop structure is the key members of the wing deck support of the present invention.  
         [0017]      FIG. 6  is a sectional view of the wing deck support of the present invention giving detailed description of the entire construction of its basic configuration and its adaptation to a biplane.  
         [0018]      FIG. 7  is another preferred embodiment yet of the present invention adapted in a monoplane describing the configuration of a wing deck support in a monoplane.  
         [0019]      FIG. 8  is another preferred embodiment yet of the present invention adapted in a triplane describing the configuration of a wing deck support in a triplane.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0020]     Referring to  FIG. 1  for a side view of a preferred embodiment of the present invention applied in a biplane, the biplane is selected as the representative airplane for the description of the relationship between the present invention and a complete model airplane. Wherein, the preferred embodiment is essentially comprised of a stick fuselage  1 , a nose  2 , and a wing deck support  3  (refer to  FIG. 7  for the representative type)  
         [0021]     The stick fuselage  1  shows a laterally provided H-beam structure of a body  11  (i.e., the shadowed area in  FIG. 2 ) adapted on its both sides each a reinforcement of a continuous loop structure  12  (as detailed in  FIG. 2 ); the nose  2  is connected to the front end of the stick fuselage; the nose  2  relates to a spherical dual assembly comprised of two parts, respectively, a semispherical socket  22  and a spherical bearing  24  (as detailed in  FIG. 3 ); and the wing deck support  3  is incorporated to both ends of a fuselage sleeve  25  by means of two dual loop structures  31  (as detailed in  FIG. 6 ) before being inserted into the middle section of the stick fuselage  1 .  
         [0022]     As further illustrated in  FIG. 1 , two wing deck  36  are respectively disposed to the upper and the lower positions of the wing deck support  3 , and a tail assembly  13  is attached to the rear end of the stick fuselage of the present invention.  
         [0023]      FIG. 2  is a side view showing that the stick fuselage  1  has its body  11  on both sides respectively adapted with a continuous loop structure  12  as reinforcement. Wherein, the dotted line indicates that both continuous loop structures are made in staggered fashion to increase the structural strength of the fuselage  1  up to the extent sufficient to support the rubber torque of the elastic band and the stress from the multiple layers of the wing of various types of model airplanes.  
         [0024]      FIG. 3  is a side view showing a construction of a nose of the preferred embodiment of the present invention. Wherein, a square hole is disposed in the rear of the nose  2  to serve as the socket  21  of the fuselage to receive insertion of the front end of the stick fuselage  1 ; and a semispherical socket  22  is disposed in front of the nose  2  to constitute a concave and convex dual device with a spherical bearing  24  that allows free adjustment of direction. The spherical bearing  24  relates to a round tube with its tip made in a shape of a ball and it tail penetrating through a hole  23  disposed at the bottom of the semispherical socket  22  and further into the nose to sustain the gyration by a power axis  25 . The spherical dual device comprised of the semispherical socket  22  and the spherical bearing  24  allows the definition of the angle of the thrust line needed by the individual type of the model airplane while gluing the angle together with the spherical bearing  24  and its rear profile of the round tube inside the nose.  
         [0025]     It is to be noted that the preferred embodiment as illustrated in  FIG. 3  is only applicable to a model airplane operating on a rubber elastic band and that it is also applicable to other type of power system by certain modification without comprising the characteristics of the present invention.  
         [0026]      FIG. 4  is a schematic view of another preferred embodiment of the present invention providing the supplementary explanation for a nose operating on a motor. Wherein, the nose is retrofitted into a type of a motor box  26  provided with a concave and convex dual device comprised of the semispherical socket  22  at its tail and another semispherical surface  28  on the front of a spherical fuselage joint  27  while the tail of the spherical fuselage joint  27  is connected to the stick fuselage  1  by means of the fuselage socket  21 . The preferred embodiment illustrated in  FIG. 4  has the spherical dual device to provide the combination of the angle of the thrust line with the motor box  26  and the spherical fuselage joint  27  for the model airplane as illustrated in  FIG. 3 . Meanwhile both of the semispherical socket  22  and the semispherical surface  28  of the concave and convex dual device are glued in position.  
         [0027]      FIG. 5  is a front view of the present invention showing in conjunction with the side view the dual loop structure of the wing deck support of the present invention that the dual loop structure is the key member of the wing deck support of the present invention to elaborate justification of design and structural variations. The dual loop structure  31  is comprised of having a rectangular support joint  32  to connect two individual loop structures; one locking channel  34  is each disposed to the upper end and the lower end to join their respectively insertions parts provided on the wing deck support  36  as illustrated in  FIG. 6 . Wherein, the dual loop structure  31  is made at a certain inclination to meet design requirements of a stagger and wing gap.  
         [0028]     The dual loop structure  31  is made of two individual loop structures  33  integrated into one piece and given with the design of a hollowed loop structure to achieve expanded structural benefits with the minimum materials for supporting the wing deck and stabilizing the incidental angle of the wing deck while also serving as the passage for the rubber elastic band. Therefore, other than the hollowed loop structure as illustrated, other hollow structures in the shape of an oval, tetragonal, or polygonal shares the same principle of construction.  
         [0029]      FIG. 6  is a sectional view of the wing deck support of the present invention. Wherein, the wing deck support  3  is comprised of a fuselage sleeve  35  adapted with two dual loop structures  31 . The fuselage sleeve  35  relates to a square tube to compromise the specification of the stick fuselage having two ends respectively connected with a dual loop structure  31  at the middle section of the support joint  32 . The support joint  32  is made in rectangular shape as illustrated in  FIG. 5  with its width comprising that of the fuselage sleeve  35  and its height reserved with a space for the adhesion of both dual loop structures to be at different levels to each other for creating the angle of incidence for the wing deck. Both of the upper and the lower ends of each of both dual loop structures  31  are respectively incorporated to the upper and the lower wing deck  36  by means of the locking channels  34  to become the type of the biplane illustrated in  FIG. 1 .  
         [0030]      FIG. 7  is another preferred embodiment yet of the present invention adapted in a monoplane. A dual loop structure  31  is divided into two individual loop structures  33  by following the middle line. of the support joint  32  illustrated in  FIG. 5  respectively incorporated to both ends of the fuselage sleeve  35 , and further to the wing deck  36  to become the type of the monoplane as illustrated in  FIG. 7 .  
         [0031]      FIG. 8  is another preferred embodiment yet of the present invention adapted in a triplane. Wherein, the wing deck support for the triplane is comprised of a combination of four dual loop structures  31  and two fuselage with three wing deck interpolated respectively in the upper, the mid and the lower levels. Though appearing to be somehow complicated for three layers of wing deck supports as illustrated, it is in fact involves two layers of the wing supports illustrated in  FIG. 6  that are overlapped and share the same wing deck.  
         [0032]     The present invention significantly upgrade the flying quality of a model airplane and is particularly in favor of mass production, diversification and popularization to add more fun in flying a model plane.