US2396886A - Model airplane - Google Patents

Description

w. F. ROSSITER 2,3386

MODEL AIRPLANE Filed Feb. 9, 1944 2 sheets-sheet 1 INVEN TOR.

mm as, ma. W. F. ROSSITER I 2,396,886

MODEL AIRPLANE Filed 'Feb. 9, 1944 2 Sheeps-Sheet 2 IN V EN TOR.

Patented Mar. 19, 1946 UNITED STATES PATENT OFFICE MODEL AIRPLANE Wayne F. Rossiter, San Rafael, Calif. Application February 9, 1944, Serial No. 521,616

4 Claims.

This invention relates to a model airplane usually employed as a toy or a flying model which may be used as a glider or powered by rubber band or miniature gasoline motor.

One of the objects of the invention is to provide a model airplane which may be constructed from sheet material such as paper, cardboard, plastic or metal; the sheet being cut and scored in such a manner that three dimensional sections of the model airplane are formed when the material is folded and fastened with an adhesive.

Another object of the invention is to provide a simple method of construction whereby flat sheets of material which have been die cut and scored may be folded along the scored lines in such a manner as to form three dimensional sections of the model plane, which bulge and bow in such a manner due to position of the score lines as to give the proper shape to these sections without the use of any interior bracing.

Another very important object of the invention is to provide die cut and scored sheets of material which have been spot gummed or an adhesive applied in certain places so that when these pieces are folded they may be fastened by moistening the adhesive.

Other objects and advantages will appear in the specifications and drawings.

In the drawings,

In Fig. 1 is shown a perspective view of the assembled model airplane showing the various sections.

Fig. 2 is a plan view of the wing section sheet with the outside die cut edges shown in full line and the scored crease lines as dotted lines.

Fig. 3is a half plan of the reverse side of the wing sheet which is symmetrical showing where spot gumming or adhesive is applied.

Fig. 4 shows an isometric view of the completed wing.

Fig. 5 is a section of the wing at the center.

Fig. 6 is a plan view showing the back side of the die cut sheetfrom which the propeller is rolled, the outside edges being shown in full line and the crease lines as dot-dash lines.

Fig. 10 is an isometric view of the folded tail section.

Fig. 11 is a plan view of the sheet for fabricating the lower fuselage with the die cut edges shown in full line and the scored crease lines shown in dash lines.

Fig. 12 is a plan view of the reverse side of the lower fuselage Fig. 11 showing where the spot gumming or adhesive is applied.

Fig. 13 is an isometric view of the completed lower fuselage with the nose block in position.

Fig. 14 is a section taken at the widest part of Fig. 13.

Fig. 15 is a plan view of the die cut and scored sheet for forming the upper fuselage cowling showing the die cut edges in full line and the scored lines as dash lines.

Fig. 16 is a plan view of the reverse side of the upper fuselage cowling shown in Fig. 15 indicating where the sheet is spot gummed or adhesive isapplied.

Fig. 17 is an isometric View of the upper fuselage cowling of Fig. 15 after the latter is folded into curved form.

Fig. 18 is a blank of heavy cardboard which is gummed on one side and die cut for fabricating the nose block of the airplane.

Fig. 19 is a plan view of a sheet of the same material as the airplane which is die cut to form washers to go on the front of the nose block of Fig. 18, the sheet being gummed on the reverse side.

Fig. 20 is a plan view of the diecut windshield.

which may be of the same material as the airplane or may be made from a transparent sheet material.

In all of the illustrations, it is seen that there are several features common to all of the structures, namely (1) the entire printing operation of the decorative designs of the airplane are on one side of the die .cut sheets and may be combined on a single sheet, excepting the nose block Fig. 18 which is of a heavier material, while (2) the spot gumming or adhesive is applied only on the reverse or back side of the sheet excepting at two places, where the wing and tail are fastened to the lower fuselage and then (3) the die cutting and scoring may be done in one operation and all sections, excepting the thicker nose block. may be combined on a single sheet. Also on all sections the summed flaps are located as to become a part of the design of the airplane.

Referring to the drawings, Fig. 2 the die cut sheet from which the complete wing is folded, the

upper portion H! is printed to represent the top' surface of an airplane wing and the lower portion H the bottom surface of the wing divided by the crease line I2 which is offset in a manner to give more width to the top surface l and less width to the bottom surface H as the center of the wing is approached which when folded causes a bulging of the top surface II] as shown in section in Fig. 5. Fig. 3 shows the areas on half of the reverse side to which the adhesive is applied the other half being similar, these areas being flaps l3 which are joined to top surface I 0 and fold under bottom H for fastening the position of flaps may be reversed with the same results or the flaps may be eliminated and the edges of the top and bottom adhered directly to each other.

The die cut sheet shown in Fig. 6 is for forming the propeller and the view is of the back side of the sheet indicating the areas where spot gumming or adhesive is applied, the die cut outline is shaped so that when rolled up it will form the shape of an airplane propeller. The scored crease lines [4 are so staggered that upon rolling the sheet the blades of the propeller l5 and I6 may be flattened approximately at right angles to each other. The sheet is rolled from the edge ll to a diameter proportionate to the spacing of the crease lines l4 and the center tab l8 completes the roll whereupon the blades l5 and I6 are each flattened at the tips as shown in Fig. 7. Printed decoration will be on side opposite that shown in Fig. 6 so will appear on outside of completed propeller. A hole is punched at center of hub to allow fasteneng to airplane with nail, pin or similar fastener for propeller to pivot on as shown in Fig. '7.

The die cut sheet shown in Fig. 8 is shaped so as to form the complete tail, the sheet being divided into areas by the crease lines, 24, 25, 26, 21, 28 radiating from the center of the sheet, these area are folded to represent the tail surfaces, namely ill the under side of the tail, 20, 2| the upper side of the horizontal sections of the tail 22, 23 the sides of the vertical member. The shape of the sheet is symmetrical about the vertical center-line with the outside edge so die cut as to form the outline of the tail members. The areas, I9, 20, 2 l, 22, 23 are so proportioned that when folded the surface 19 will lie in a fiat plane and the surfaces 20, 2| will have camber due to the extra material and the curvature of the crease lines, 26, 21. The balance of the material folds upward to form the vertical member with surfaces 22, 23 divided at their leading edge by crease line 28 which divides at its lower end to provide a double creased edge for bracing the vertical member. Flaps 29, 30 are located off surfaces 20, 2! and crease lines 3i, 32 are indicated for folding the flaps down under surface IS. The reverse side of the tail sheet is shown in Fig. 9 and surfaces are indicated by the same numerals as in Fig. 8, the areas to be spot gummed or where adhesive is to be applied are indicated, namely the horizontal tips, the vertical trailing edge, the flaps and a central spot on the lower part of the vertical member. When assembling I9 is folded back under the balance of the sheet, 22, 23 are folded together, about the crease 28 causing the creases along the scored lines 26, 21 and the cambered effect of the upper horizontal surfaces 20, 2| as shown in Fig. 10; the edges are adhered and the flaps 29, 30 are folded under and fastened.

The sheet for fabricating the lower fuselage is shown in Fig. 11 and is die cut and scored in such a manner that when folded and fastened results in til the rigid shape of Fig. 13 of somewhat triangular section as shown in Fig. 14. The edge 33 and the scored crease lines, 34, 38 are so laid out that upon folding into an inverted triangular shape with 35 as the inverted apex of the triangle the portion of the top surface 38 to whi h the wing is to be fastened has longitudinal shape for positioning the wing properly. By use of spot gumming or an adhesive applied as shown in Fig. 12 the tail end of the lower fuselage is fastened into triangular section and then cut edge 31 is fastened back (dot-dash line) and nose block is inserted and forward edges fastened as shown in Fig. 13.

The sheet Fig. 15 is printed and die out so that when the sides are bent down and the tab 39 is fastened back (dot-dash line) the edge 40 is bulged upward and the crease lines 4| cause a flat surface to occur to represent the cockpit of the airplane as shown in Fig. 1'7. The slot 42 is for attaching the tab of the windshield Fig. 20. All spot gumming or adhesive is applied to reverse side a shown in Fig. 16 and the section Fig. 17 is fastened to the lower fuselage Fig. 13 with the ends 43 fastening to the tail after wing Fig. 4 and tail Fig. 10 have been fastened to lower fuselage.

The blank of material Fig. 18 which is heavier than the material used for the other sections is die cut in a series of similar oval pieces which may be laminated together to produce a nose block which is used both as a means of attachin the propeller to the fuselage and as a counterweight to balance the plane. This blank may be gummed or adhesive applied to one side. A block of wood of the same general shape as the punchings from Fig. 18 may be used as an alternate nose block. To be used with the nose block are the washers of Fig. 19 which are used between propeller and nose block, these may be printed on one side and gummed on the other and die cut from the airplane sections sheets; it is intended that the larger washer 44 be the same shape as the nose block that the others be circular and diminish in size.

The usual sequence for assembling the sections of the model airplane after each has been folded and fastened to shape is: fasten wing of Fig. 4 and tail of Fig. 10 to fuselage of Fig. 13, fasten upper fuselage cowling of Fig. 17 over these three then attach propeller of Fig. '7 to nose block with pin or nail and insert windshield of Fig. 20 in slot 42 and under edge dB to secure it. The resulting assembly is shown in Fig. 1.

Although I have shown and described the construction of one design of model airplane there are many other variations possible in the design as adapted to suit different types of models which would come within the scope of this invention,

but most of which would constitute modifications of the examples herein illustrated.

Having described my invention I claim:

1. A tail for a model airplane constructed from a single piece of flat sheet material divided into five portions by score lines radiating from the center of the sheet in such a manner as to form the complete tail assembly of a model airplane when the portions are folded backwards from the center and fastened at outer edges.

2. IA propeller for a model airplane constructed from a, single piece of flat sheet material which has been die cut and scored in a manner that when said sheet is rolled up, the two opposing blades will fold flat at the tips and taper to round section at the center of the airplane, the scored lines on the sheet material being staggered with respect to one another whereby the flattened tips longitudinally extending curved surfaces in the I top and bottom portions of the wing when the material is folded.

4. A wing for a model airplane constructed from a single piece of flat material in which the sections forming the top and bottom surfaces are divided by a scored line that is ofiset relative to a straight line and in which the top surface at any given longitudinal section is of greater Width than the bottom surface at the same cross section to provide camber in the top surface with the top surface upwardly arched from end to end, thereby forming a rigid structure which tapers from a relatively thick section at its middle to thin edges in all directions.

WAYNE F. ROSSITER.

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