WO1993013841A1 - Dispositif volant gyroscopique - Google Patents

Dispositif volant gyroscopique Download PDF

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Publication number
WO1993013841A1
WO1993013841A1 PCT/US1992/011369 US9211369W WO9313841A1 WO 1993013841 A1 WO1993013841 A1 WO 1993013841A1 US 9211369 W US9211369 W US 9211369W WO 9313841 A1 WO9313841 A1 WO 9313841A1
Authority
WO
WIPO (PCT)
Prior art keywords
rim
gyroscopic
flight
leading
flying device
Prior art date
Application number
PCT/US1992/011369
Other languages
English (en)
Inventor
William Mark Forti
William Bell Forti
Original Assignee
William Mark Forti
William Bell Forti
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by William Mark Forti, William Bell Forti filed Critical William Mark Forti
Publication of WO1993013841A1 publication Critical patent/WO1993013841A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H27/00—Toy aircraft; Other flying toys
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H33/00—Other toys
    • A63H33/18—Throwing or slinging toys, e.g. flying disc toys

Definitions

  • This invention relates to gyroscopic flying mechanisms having an annular hollow body of cylindrical like shape which can be manually or mechanically propelled.
  • Early flying devices include airplanes, missiles and other variously shaped vehicles which could be based upon round, oval, flat or cylindrical bodies.
  • the closest class of devices to the present invention are cylindrical shaped aerial devices.
  • Kahn et al in U.S. Patent No. 4,151,674, claims improved aerodynamic performance by incorporating a ledge along the forward edge of the cylindrical body.
  • the rearwardly directed ledge is claimed to reduce drag and move the center of gravity to the forward quarter of the total tubular length. Best performance was reported with the center of gravity placed at about 25% of the distance from the leading edge.
  • Bowers in U.S. Patent 4,246,721, teaches the use of an annular recess on the outer surface of the hollow body adjacent the leading edge, together with an annular ridge formed on the adjacent inner wall.
  • a weighted annular ring is adjustably positioned within the cylinder so as to change the station location of the forward center of gravity. Selection of the center of gravity is said to change the aerodynamic characteristics so as to produce several curvilinear flight paths.
  • Hill, in U.S. Patent 4,790,788 states that the above cited devices have not had much commercial impact because aerodynamic characteristics are easily lost. He notes that said devices have erratic, unpredictable, and inconsistent flight characteristics.
  • the present invention is directed to a free spinning annular cylinder like hollow body flying apparatus, open at both ends, having a leading and a trailing end and having a side wall with an inner and outer surface-
  • the body contains a balanced, uniformly weighted annular rim along its leading edge.
  • the rim must be sufficiently weighted and balanced to produce substantial gyroscopic effects when the body is lofted through the air with a spinning motion.
  • the free spinning gyroscopic rim allows the body to maintain its reference direction, attitude and orientation while in flight.
  • the weighted rim also shifts the body's center of gravity forward toward the leading edge, which enables the creation of lift. It is the balanced interaction between substantial gyroscopic forces and aerodynamic lift forces which creates superb flight performance.
  • the annular hollow body can take the form of various shapes, configurations, and sizes utilizing different materials. As examples, it may have the shape of a cylinder, tube or cone; the side walls may be of uniform thickness or tapered and comprised of light plastics, metal or composite materials; the trailing end of the body surface can consist of a number of equally spaced trailing blades or fins.
  • Gyroscopic principles are well known.
  • a weighted gyroscopic rim is located toward the leading edge of the body.
  • the weighted, spinning rim allows the body to maintain its projected direction and attitudinal orientation.
  • the rim's angular momentum prevents it from nosing down as a response to the force of gravity
  • the weight of the rim portion should be at least 75% of the device's total weight and that it should constitute less than the leading 31% of the device's axial length.
  • the rim can consist of a weighted ring embedded in a cylinder body, or evenly distributed weights along the leading edge.
  • the material of the body, itself can be thickened along the leading edge area to achieve a rim of required weight.
  • Yet another object of this invention is to provide a rotating flight vehicle which can be easily manually or mechanically propelled.
  • Yet another object of the invention is to provide a rotating flight vehicle with a reduced sensitivity to aerodynamic characteristics of the body shape.
  • Still another object of the invention is to provide a flight vehicle which can be inexpensively manufactured and safe to use.
  • Figure 1 is a rear perspective view illustrating the operation of a gyroscopic cylindrical embodiment of the present invention for utilization as an aerial sports toy which is manually propelled.
  • Figure 2 is a side elevation view of the present invention, showing the forward leading edge on the left and defining the x axis.
  • Figure 3 is an end view of the preferred embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
  • Body 10 includes a hollow cylindrical body 12 and a weighted rim 14 at the leading edge.
  • Body 10 is shown being manually held by hand 16 just prior to launch.
  • gripping fingers 18 work in cooperation with wrist 20 to impart axial spin to the device in the direction illustrated by arrow 22.
  • the thrower provides an initial forward velocity along spin axis 24.
  • Test prototypes having diameter ranges of 6.35 to 10.16 cm, with body lengths of 3.81 to 6.35 cm, and rim portion width of 1.27 cm, have been found to fit comfortably within the grip of an average sized man. It is anticipated that manual usage will include games of catch or competition events in which throwers aim for maximum flight times, distance, or accuracy.
  • cylinder 10 can be launched by various known mechanical or powered mechanism means which can aim and impart the initial velocity and spin conditions.
  • Such means may be carried aboard a spinning device or may be externally separate. Included in these means are springs, catapults and other leverage mechanisms, explosive or burning propellant systems, as well as normal powered devices running on electricity or various fuel systems.
  • the device when properly thrown, the device will initially follow a more or less linear flight path from the initial direction 24. Substantial gyroscopic forces tend to stabilize the flight path against the gravitational forces acting to rotate the heavy gyroscopic rim downward about a horizontal axis 32. Toward the end of flight, when the spinning and forward velocity diminish, the device will precess from right to left about a vertical axis 26. The flight then will veer to the left along path 30. The end of flight is characterized by the rim nosing down accompanied by gyroscopic coning motions.
  • Figure 2 shows a side view of cylinder 10 with the weighted rim 14 oriented with its x axis along the direction of launch arrow 24.
  • the rim portion is comprised of a thin annular metal band attached to the leading edge of the internal wall of the cylinder.
  • the body's center of gravity is shown at 42.
  • Figure 3 shows the front view of cylinder 10 corresponding to Figure 2.
  • Leading edge 44 comprised of the rim and body wall, has a thickness on the order of .254 cm. The effects of head on drag from the thin fiat leading edge appear negligible. Comparative performance tests have been made which show the importance of adequate up front weighting to obtain significant gyroscopic effects and enhanced flight performance.
  • Plastic models were used having body lengths of 5.08 cm and diameters of 9.56 cm.
  • Various weighted metal rims of 1.27 cm have been added to the forward region along the leading edge.
  • the Table below presents "normal throw" averages of approximate flight ranges of devices with different rim weight percentages obtained under wind-still conditions and an observation appraisal of flight characteristics.
  • Weight distributions of the present invention are determined without regard to aerodynamic modifications of the cylinder, in contrast, prior art weight distributions are sited in conjunction with a variety of specific aerodynamic modifications. Nevertheless, weight distributions of previous designs are well below the 73% case indicated above; and therefore, can not achieve sufficient gyroscopic stabilization to reach the greater ranges or smoother flight characteristics exhibited by the present invention. Maximum ranges for "hard throws" of a typical man can exceed 100 meters.

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  • Toys (AREA)

Abstract

Corps creux (10), analogue à un cylindre et à rotation libre, comprenant un bord d'attaque (44) et un bord de puite ouverts aux extrémités ainsi qu'une paroi latérale pourvue de surfaces interne et externe. Le bord d'attaque contient un rebord (14) équilibré, lourdement et uniformément lesté, servant à générer des forces gyroscopiques. Lorsque le dispositif est lancé en avant et vers le haut, en un mouvement de rotation (22) autour d'un axe et sensiblement dans la direction du vol, le corps est stabilisé de manière gyroscopique par rapport à la direction, à l'attitude et à l'orientation. Le bord lesté (14) déplace également le centre de gravité (42) du corps vers le centre de pression, auprès du bord d'attaque, ce qui permet de produire la force ascensionnelle.
PCT/US1992/011369 1992-01-21 1992-12-28 Dispositif volant gyroscopique WO1993013841A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US82709192A 1992-01-21 1992-01-21
US07/827,091 1992-01-21
PCT/US1995/000197 WO1996020769A1 (fr) 1992-01-21 1995-01-06 Dispositif volant gyroscopique

Publications (1)

Publication Number Publication Date
WO1993013841A1 true WO1993013841A1 (fr) 1993-07-22

Family

ID=26789446

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US1992/011369 WO1993013841A1 (fr) 1992-01-21 1992-12-28 Dispositif volant gyroscopique
PCT/US1995/000197 WO1996020769A1 (fr) 1992-01-21 1995-01-06 Dispositif volant gyroscopique

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US1995/000197 WO1996020769A1 (fr) 1992-01-21 1995-01-06 Dispositif volant gyroscopique

Country Status (1)

Country Link
WO (2) WO1993013841A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264776A (en) * 1966-02-16 1966-08-09 Wham O Mfg Company Aerial toy
US4151674A (en) * 1976-06-14 1979-05-01 Klahn Dale H Flying cylinder
US4246721A (en) * 1979-09-10 1981-01-27 Louis Bowers Aerial toy
US4390148A (en) * 1976-03-31 1983-06-28 Wave-Rider, Inc. Rotary wing device
US4790788A (en) * 1986-01-27 1988-12-13 Hill Jerry M Aerial toy
US4850923A (en) * 1988-05-06 1989-07-25 Etheridge Ronald D Flying toy
US5067922A (en) * 1990-04-19 1991-11-26 Mcmahon Michael E Combination drink cooler and throwing toy
US5152709A (en) * 1991-08-05 1992-10-06 Johnson Iii Walter L Beverage insulating flight cylinder

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264776A (en) * 1966-02-16 1966-08-09 Wham O Mfg Company Aerial toy
US4390148A (en) * 1976-03-31 1983-06-28 Wave-Rider, Inc. Rotary wing device
US4151674A (en) * 1976-06-14 1979-05-01 Klahn Dale H Flying cylinder
US4246721A (en) * 1979-09-10 1981-01-27 Louis Bowers Aerial toy
US4790788A (en) * 1986-01-27 1988-12-13 Hill Jerry M Aerial toy
US4850923A (en) * 1988-05-06 1989-07-25 Etheridge Ronald D Flying toy
US5067922A (en) * 1990-04-19 1991-11-26 Mcmahon Michael E Combination drink cooler and throwing toy
US5152709A (en) * 1991-08-05 1992-10-06 Johnson Iii Walter L Beverage insulating flight cylinder

Also Published As

Publication number Publication date
WO1996020769A1 (fr) 1996-07-11

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