US3699708A - Electric-powered model airplane - Google Patents

Electric-powered model airplane Download PDF

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Publication number
US3699708A
US3699708A US203516A US3699708DA US3699708A US 3699708 A US3699708 A US 3699708A US 203516 A US203516 A US 203516A US 3699708D A US3699708D A US 3699708DA US 3699708 A US3699708 A US 3699708A
Authority
US
United States
Prior art keywords
model airplane
dry cell
electric
case
powered
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US203516A
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English (en)
Inventor
Kenichi Mabuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mabuchi Motor Co Ltd
Original Assignee
Mabuchi Motor Co Ltd
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
Priority claimed from JP8430571A external-priority patent/JPS5638236B2/ja
Application filed by Mabuchi Motor Co Ltd filed Critical Mabuchi Motor Co Ltd
Application granted granted Critical
Publication of US3699708A publication Critical patent/US3699708A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A63H27/02—Model aircraft

Definitions

  • ABSTRACT A novel electric-powered model airplane is for the first time disclosed which has an electric motor for driving a propeller and a specific dry cell mounted thereon, said dry cell being of a high capacity, small size and light weight and, if desired, encased in a case with a plurality of openings or fins for heat radiation.
  • the model airplane may be provided with a remote control device, if desired.
  • the present model airplane can be simply operated and affords enjoyment to adults as well as children.
  • This invention relates to a model airplane, and more particularly to a model airplane having an electric motor and a dry cell as an electric power source mounted thereon and adapted to fly by itself.
  • the dry cell being subjected to high drain and the electric motor connected to the cell are extremely heated to place the model in a undesirable condition.
  • undesirable condition can be avoided by providing a plurality of openings in a housing for the electric motor and/or case for dry cells and disposing the case or case at a position where it is exposed to air flow so that the housing and/or case may be effectively cooled.
  • one and principal object of this invention is to provide an electric-powered model airplane having an electric motor and a dry cell mounted thereon and adapted by itself.
  • Another object of this invention is to provide an electric-powered model airplane of the kind described, wherein the flight time can be varied by employing a rechargeable dry cell and by adjusting recharging of the dry cell.
  • a further object of this invention is to provide a model airplane having a rechargeable dry cell mounted thereon and adapted to simulate such a refueling operation of airplane.
  • a still further object of this invention is to provide a model airplane which is remotely controllable in flight time and direction.
  • a still further object of this invention is to provid an electric-powered model airplane without a danger of superheating and damage of the electric motor and the dry cell employed.
  • an electric-powered model airplane capable of flying by itself comprising a body; a propeller rotatably mounted on a forward portion of the body; an electric motor substantially free from a spark and having a shaft engaged with propeller shaft through gearings; a case encasing a dry cell having an electrical connection to the motor through a switch means.
  • FIG. 1 is a partly cut-away side view of the forward part of a model airplane according to this invention, showing the internal structure;
  • FIG. 2 is a diagram showing the relation between the voltage drop of a dry cell used in this invention and the time, shown in comparison with that with respect to a conventional dry cell;
  • FIG. 3 is a partly cut-away side view of another embodiment of this invention, showing the internal structure
  • FIG. 4 is a partly cut-away perspective view of still further embodiment of this invention, showing the internal structure.
  • model airplanes ordinarily having a body 1 composed of a frame work made of balsa and a paper or cloth attached thereto.
  • the model body may also be made of a suitable plastic foam.
  • An electric motor 2 is fixed to the body at an appropriate position such as a partition.
  • the electric motor is of such a kind that it is driven at a relatively low voltage and it has a rotor 2b with, for example, a disk-shaped condenser 2c disposed around a commutator 2a for preventing spark.
  • a rotor 2b with, for example, a disk-shaped condenser 2c disposed around a commutator 2a for preventing spark.
  • Such kind of an electric motor has been disclosed in British Patent application No. 30202/69 filed on June 13, 1969.
  • the electric motor has a shaft 2d connected to a propeller 3 directly or through gearings such as a toothed wheel 5 and the like, and a self-clutching and declutching means 5a.
  • the self-clutching and declutching means serves the propeller to be connected with the electric motor when the motor is driven, and to be disconnected from the motor when the motor is stopped.
  • the airplane body carries at its predetermined position a case 4a for encasing therein a rechargeable dry cell 4 of miniature type and light weight.
  • the dry cell 4 may be previously loaded into the case 4a, whereupon the case encasing therein the dry cell is fixed to a predetermined position in the body.
  • the dry cell used according to this invention is a light and miniature type one having large short-circuit current, and is preferably rechargeable.
  • Another dry cell 9 is provided for actuating a wireless control system, which is electrically connected with radio wave receiver 10, to which an antenna 11 is also connected for receiving control wave.
  • the dry cell is also of a light weight and small size and is rechargeable.
  • the receiver of a miniature and light weight type is used.
  • the radio wave receiver 10 is also electrically connected to a switch 12 for a wireless control and an automatic control system 14 through a connector commarized in the following table, shown in comparison 10 posed ofa multi-terminal plug and asocket.
  • Type of model airplane Type of dry cell of cells (g.) (g.) (g.) (percent) Single channel type " ⁇ GE Nl-Gd dry cell [%AA size (ASTM)] 6 500 150 78 16 Reclanch dry cell (UM3" size) paper jacketed type- 21 735 150 315 43 Multichannel type ⁇ GE Ni-Cd dry cell [Sub C" size (ASTM)] 13 2,000 500 550 28 Reclanch dry cell ("UM2 size) paper jacketed type 50 3, 450 500 2, 000 58 Free flight type " ⁇ GE NiCd dry cell [%AA size (AS'IM)] 2 110 14 13 Reclanch dry cell (UM3 size) paper jacketed type 4 156 0 60 38
  • the dry cell 4 is electrically connected with the electric motor 2 through the medium of a control system such as a switch 12 or a wireless control
  • the dry cell is also electrically connected to a recharging terminal 18 provided in the body wall.
  • the dry cell is recharged to a degree sufficient to effect flying of the model airplane and then a switch 12 is turned on or a signal to close the electricalcircuit is given by the wireless control system 10.
  • the electric motor begins to rotate and then said self-clutching means is operated to effect revolution of the propeller.
  • the model airplane starts to fly.
  • the capacity in the dry cell becomes low, flight velocity drops to stop rotation of propeller and then airplane glides in the air.
  • a propeller is disen- 5 gaged from the motor by said self-declutching means, whereby the model airplane will be smoothly landed.
  • the wireless control means it is apparent that a propeller can be stopped or restarted to rotate at any desired time without a continuous flight until the dry cell will be exhausted.
  • FIG. 2 the diagram shows the relation between the voltage drop of the dry cell used in this invention and the time, shown in comparison with that of Modified model airplanes of this invention which are 1 controllable by a wireless control system are illustrated in FIGS. 3 and 4.
  • FIG. 3 shows a model airplane of a type in which a single channel system for remote control is employed.
  • a switch 6 for starting an electric motor 2 a condensor 7 for preventing the motor from sparking, a toroidal coil 8 also for prevention of sparking are connected between the electric motor 2 and a dry cell 4.
  • the dry cell 4 is encased in a case 4a having a plurality of openings for heat radiation.
  • the case is positioned at a predetermined place suitable for cooling the dry cells 14a adapted to be gradually rotated in both directions by the signal of the received wave.
  • the rotary disk 14a is fixedly mounted on a rotary shaft 15 having a bent 15a. As the disk 14a is rotated, the bent 15a is caused to rotate.
  • the bent 15a is brought into engagement with a bent rod 17a provided at one end of a torque transmission rod 17 which is provided at the other end thereof with another bent rod 17b.
  • a tail fin 16 of the model airplane has a rudder 16a hinged to the tail.
  • the bent rod 17b is engaged with a projection 16a fixed to the rudder 16a.
  • a ter- 4 minal 18 for recharging dry cell 4 is provided in the outer wall of the airplane body 1 and electrically connected to the dry cell.
  • FIG. 4 shows a model airplane of a type in which a multi-channel system for remote control is employed.
  • the model body 19 has a right and left wings 20, 21, stabilizers 22 and a tail fin 23. Both the wings 20, 21 each have aileron 20a 21a.
  • the stabilizers 22 each have an elevator 22a hinged thereto and the tail fin 23 has a rudder 23 pivotally connected thereto. H
  • An electric motor 24 having a shaft connected to a propeller 25 is, in turn, connected to a dry cell 26 for driving the motor.
  • the electric motor and the dry cell may be the same as is used for the single channel system of the model airplane.
  • a control device 27 for the revolution speed of the motor is electrically connected with the electric motor 24 and two dry cell units 26.
  • Numeral 27a designates a servo-motor.
  • the electric motor 24 has a condenser 31 and a troidal coil 32 both for preventing jamming.
  • Nu- ,meral 50 designates a switch for the motor.
  • Each dry cell unit 26 is mounted on the outside of the body at a ibase portion of the wing.
  • a servo-motor 28 is connected with a right-side aileron 21a through a push rod 34, a bell crank 35 and a horn 36, and with a left-side aileron 20a through a push rod 37, a bell crank 38 and a horn 39.
  • a servo-motor 29 is connected with elevators 22a through a push rod 40 and a horn 41.
  • a servomotor 30 is connected with a rudder 23a through a :Qpush rod 42 and
  • dry cell is of type as shown in FIG.
  • recharging terminal 47 and a fuse 48 are also provided.
  • model airplane is for the first time provided which has an electric motor for driving a propeller and a specific dry cell mounted thereon, said dry cell being of a high capacity, small size and light weight and encased in a case with a plurality of openings or fins for heat radiation.
  • the model air plane may be provided with a nrction to e tie WPPFlhFQEh aswits jnsaas. 7
  • An electric-powered model airplane as claimed is claim 1, wherein said case is provided with a plurality 1 of openings and/or fins, thereby enabling heat generated from the dry cell to be radiated.

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  • Toys (AREA)
US203516A 1970-12-02 1971-12-01 Electric-powered model airplane Expired - Lifetime US3699708A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10601970 1970-12-02
JP8430571A JPS5638236B2 (oth) 1971-10-26 1971-10-26

Publications (1)

Publication Number Publication Date
US3699708A true US3699708A (en) 1972-10-24

Family

ID=26425358

Family Applications (1)

Application Number Title Priority Date Filing Date
US203516A Expired - Lifetime US3699708A (en) 1970-12-02 1971-12-01 Electric-powered model airplane

Country Status (7)

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US (1) US3699708A (oth)
AU (1) AU464679B2 (oth)
CA (1) CA976356A (oth)
DE (1) DE2159843A1 (oth)
FR (1) FR2117322A5 (oth)
GB (1) GB1362298A (oth)
IT (1) IT960532B (oth)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745699A (en) * 1971-10-25 1973-07-17 Mabuchi Motor Co Device for automatically lowering and landing an electric model plane
US3757461A (en) * 1972-08-07 1973-09-11 Mattel Inc Impact-damage-resistant, propeller-driven toy
US3757462A (en) * 1971-07-14 1973-09-11 Mabuchi Motor Co System for safely lowering an electric model plane
US3777420A (en) * 1972-08-04 1973-12-11 Mattel Inc Detachable power module for flying toy aircraft
US3803758A (en) * 1972-11-06 1974-04-16 Mattel Inc Programmable free-flight toy aircraft
US3826038A (en) * 1972-12-13 1974-07-30 A Gentilini Bicycle toy which can be either manually operated or remote controlled by means of a wire control or by radio control
US3857194A (en) * 1972-06-20 1974-12-31 M Guttman Model auto-giro
US3914899A (en) * 1973-06-01 1975-10-28 Mabuchi Motor Co Motor mount
US3930628A (en) * 1974-11-27 1976-01-06 The United States Of America As Represented By The National Aeronautics And Space Administration, Office Of General Counsel-Code Gp Depoly/release system
US3957230A (en) * 1973-07-30 1976-05-18 Boucher Roland A Remotely controlled electric airplane
US4027422A (en) * 1975-09-29 1977-06-07 Schroeder Lloyd A Model aircraft propulsion
US5492024A (en) * 1994-02-22 1996-02-20 Siner; Irwin H. Servo-wheel for use with powered model craft
US20020106961A1 (en) * 2001-02-08 2002-08-08 Mark Barthold Toy airplane powered by electric motor and capacitor power source
US6764047B2 (en) 2001-01-26 2004-07-20 Todd Scott Miller Model airplane hinge construction
US20040169485A1 (en) * 2003-02-28 2004-09-02 Clancy Andy J. Vehicle direction control with a crosswise fan
RU2247588C1 (ru) * 2003-10-23 2005-03-10 Краснов Юрий Константинович Электрическая модель самолета
US20060049306A1 (en) * 2003-02-21 2006-03-09 Seung-Woo Kim Rear wing structure for remote-controlled flight assuring fast and stable turning
US20060144995A1 (en) * 2004-12-10 2006-07-06 Clancy Andy J Remotely controlled model airplane having deflectable centrally biased control surface
US20080242186A1 (en) * 2006-05-03 2008-10-02 Nicholas Amireh Toy aircraft with modular power systems and wheels
RU2372127C1 (ru) * 2008-03-21 2009-11-10 Юрий Константинович Краснов Электрическая модель самолета
US7667424B2 (en) 2006-04-26 2010-02-23 Futaba Corporation Servo device
US20110130066A1 (en) * 2006-05-03 2011-06-02 Mattel, Inc. Toy aircraft with modular power systems and wheels
USD724675S1 (en) * 2012-03-22 2015-03-17 Shai Goitein Power unit attachable to a folded paper airplane
USD725715S1 (en) * 2014-01-28 2015-03-31 Shai Goitein Power unit attachable to a folded paper airplane
USD755900S1 (en) 2014-10-01 2016-05-10 Shai Goitein Power unit attachable to a folded paper airplane
USD756466S1 (en) 2015-10-12 2016-05-17 Shai Goitein Power unit attachable to a folded paper airplane
USD757859S1 (en) 2014-10-01 2016-05-31 Shai Goitein Power unit attachable to a folded paper airplane
US9375650B1 (en) 2012-03-22 2016-06-28 Shai Goitein Electric power airplane conversion kit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9116072U1 (de) * 1991-12-24 1992-05-07 Groß, Michael, Dr., 3400 Göttingen Elektrischer Antrieb für ferngesteuerte oder freischwimmende/freifahrende/freifliegende Modelle (Auto-, Schiffs- oder andere, insbesondere aber Flugmodelle)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599484A (en) * 1947-08-01 1952-06-03 William A Rhodes Steering control for model aircraft
US2805349A (en) * 1955-10-19 1957-09-03 Elliott A Friedman Model airplane control device
US2858386A (en) * 1955-03-17 1958-10-28 Howard T Bonner Remotely controlled escapement mechanism for model airplanes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599484A (en) * 1947-08-01 1952-06-03 William A Rhodes Steering control for model aircraft
US2858386A (en) * 1955-03-17 1958-10-28 Howard T Bonner Remotely controlled escapement mechanism for model airplanes
US2805349A (en) * 1955-10-19 1957-09-03 Elliott A Friedman Model airplane control device

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757462A (en) * 1971-07-14 1973-09-11 Mabuchi Motor Co System for safely lowering an electric model plane
US3745699A (en) * 1971-10-25 1973-07-17 Mabuchi Motor Co Device for automatically lowering and landing an electric model plane
US3857194A (en) * 1972-06-20 1974-12-31 M Guttman Model auto-giro
US3777420A (en) * 1972-08-04 1973-12-11 Mattel Inc Detachable power module for flying toy aircraft
US3757461A (en) * 1972-08-07 1973-09-11 Mattel Inc Impact-damage-resistant, propeller-driven toy
US3803758A (en) * 1972-11-06 1974-04-16 Mattel Inc Programmable free-flight toy aircraft
US3826038A (en) * 1972-12-13 1974-07-30 A Gentilini Bicycle toy which can be either manually operated or remote controlled by means of a wire control or by radio control
US3914899A (en) * 1973-06-01 1975-10-28 Mabuchi Motor Co Motor mount
US3957230A (en) * 1973-07-30 1976-05-18 Boucher Roland A Remotely controlled electric airplane
US3930628A (en) * 1974-11-27 1976-01-06 The United States Of America As Represented By The National Aeronautics And Space Administration, Office Of General Counsel-Code Gp Depoly/release system
US4027422A (en) * 1975-09-29 1977-06-07 Schroeder Lloyd A Model aircraft propulsion
US5492024A (en) * 1994-02-22 1996-02-20 Siner; Irwin H. Servo-wheel for use with powered model craft
US6764047B2 (en) 2001-01-26 2004-07-20 Todd Scott Miller Model airplane hinge construction
US20020106961A1 (en) * 2001-02-08 2002-08-08 Mark Barthold Toy airplane powered by electric motor and capacitor power source
WO2002072222A1 (en) * 2001-02-08 2002-09-19 Mattel, Inc. Toy airplane powered by electric motor and capacitor power source
US6568980B2 (en) * 2001-02-08 2003-05-27 Mattel, Inc. Toy airplane powered by electric motor and capacitor power source
US20060049306A1 (en) * 2003-02-21 2006-03-09 Seung-Woo Kim Rear wing structure for remote-controlled flight assuring fast and stable turning
US20040169485A1 (en) * 2003-02-28 2004-09-02 Clancy Andy J. Vehicle direction control with a crosswise fan
RU2247588C1 (ru) * 2003-10-23 2005-03-10 Краснов Юрий Константинович Электрическая модель самолета
US20060144995A1 (en) * 2004-12-10 2006-07-06 Clancy Andy J Remotely controlled model airplane having deflectable centrally biased control surface
US7121506B2 (en) 2004-12-10 2006-10-17 Clancy Andy J Remotely controlled model airplane having deflectable centrally biased control surface
DE102007019553B4 (de) 2006-04-26 2022-09-29 Futaba Corp. Servoeinrichtung
US7667424B2 (en) 2006-04-26 2010-02-23 Futaba Corporation Servo device
US20080242186A1 (en) * 2006-05-03 2008-10-02 Nicholas Amireh Toy aircraft with modular power systems and wheels
US7918707B2 (en) 2006-05-03 2011-04-05 Mattel, Inc. Toy aircraft with modular power systems and wheels
US20110130066A1 (en) * 2006-05-03 2011-06-02 Mattel, Inc. Toy aircraft with modular power systems and wheels
RU2372127C1 (ru) * 2008-03-21 2009-11-10 Юрий Константинович Краснов Электрическая модель самолета
USD724675S1 (en) * 2012-03-22 2015-03-17 Shai Goitein Power unit attachable to a folded paper airplane
US9375650B1 (en) 2012-03-22 2016-06-28 Shai Goitein Electric power airplane conversion kit
US9682329B1 (en) 2012-03-22 2017-06-20 Shai Goitein Electric power paper airplane conversion kit/unit
USD725715S1 (en) * 2014-01-28 2015-03-31 Shai Goitein Power unit attachable to a folded paper airplane
USD755900S1 (en) 2014-10-01 2016-05-10 Shai Goitein Power unit attachable to a folded paper airplane
USD757859S1 (en) 2014-10-01 2016-05-31 Shai Goitein Power unit attachable to a folded paper airplane
USD756466S1 (en) 2015-10-12 2016-05-17 Shai Goitein Power unit attachable to a folded paper airplane

Also Published As

Publication number Publication date
IT960532B (it) 1973-11-30
CA976356A (en) 1975-10-21
FR2117322A5 (oth) 1972-07-21
DE2159843A1 (de) 1972-06-08
AU464679B2 (en) 1975-09-04
AU3642571A (en) 1973-06-07
GB1362298A (en) 1974-08-07

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