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J-3 ElectriCub

DATA ARCHIVE

  • • FILENAME: J-3 ELECTRICUB
  • • 59 INCH WINGSPAN
  • • RADIO CONTROL SPORT SCALE MODEL
  • • FOR ELECTRIC POWER

Overview of the ElectriCub (Late Version)

The ElectriCub is a radio-controlled sport scale model designed for electric power utilizing a Speed 600 motor and requiring 4 channels for operation. It features a wingspan of 59 inches and comes equipped with enhancements for better performance and user experience.

Model Specifications

The GP ElectriCub has two versions: the Early and the Late. This document focuses on the Late version, which was introduced around 2000. This iteration includes cabin glazing, a bolt-down wing, and ailerons for improved control and stability.

Evolution of the ElectriCub

Since its original introduction in 1987, the ElectriCub has evolved significantly alongside advancements in electric aircraft technology. Feedback from modelers has shaped its redesign, introducing features that enhance usability and performance, including:

  • Ailerons for better maneuverability
  • Clear windows for a more realistic appearance
  • Designs compatible with mini servos
  • Extensive testing of motors, gearboxes, and propellers has been conducted to ensure an optimal combination that balances performance and affordability.

    Tips for Building a Balsa Model Plane from Plans

  • Select Quality Materials: Use high-quality balsa wood and lightweight materials for other components to maintain a light airframe. This is crucial, as the electric motor and battery tend to be heavier than traditional engines.

  • Precision Cutting and Assembly: Follow the plans meticulously. Use sharp tools for clean cuts, ensuring that all pieces fit snugly together. Properly sand edges to avoid unnecessary weight and improve the fit.

  • Keep It Light: Strive for a lightweight structure. Eliminate any non-essential parts and use lighter adhesives, like cyanoacrylate, to minimize weight.

  • Integrate Ailerons: If building the late version, ensure that the ailerons are installed correctly and that the hinges are smooth. This will aid in achieving better control during flight.

  • Reinforce Key Areas: While maintaining a lightweight structure, reinforce critical stress points, such as the wing joints and landing gear, to enhance durability without adding excessive weight. Motor Placement: Position the motor according to the plans to ensure the aircraft is balanced. Incorrect motor placement can lead to undesirable flight characteristics.

  • Test Weight Distribution: Before final assembly, check the center of gravity (CG). Adjust the placement of the battery and servos to achieve the recommended CG as outlined in the plans.

  • Pre-flight Check: Conduct a thorough inspection before the first flight, ensuring all components are securely fastened, the electronics are functioning, and the control surfaces respond correctly. Motor Selection and Performance

    When selecting a motor for the ElectriCub, note the following recommendations based on comprehensive testing:

    Great Planes S-600 Direct Drive Motor: Offers good climb rate and aerobatic capability but results in shorter flight times (approximately 3 to 4 minutes).

    Great Planes T600r Reverse Rotation Motor: Used with a 2.5:1 gear drive unit, this option allows for a larger and more efficient propeller at slower speeds, delivering greater thrust, a better climb rate, and longer flight times up to 8 minutes.

    Opting for the motor and gear drive combination is highly recommended for optimal performance in the ElectriCub.

    Conclusion

    The ElectriCub represents a blend of innovation and traditional construction. By adhering to the building tips provided and selecting appropriate motor options, enthusiasts can ensure a rewarding flying experience. Happy building, and enjoy your time in the skies!

    • J-3 ELECTRICUB FREE DOWNLOAD

    DATA REPOSITORY

    J-3 ELECTRICUB PRINTED PLANS

    $25.00

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