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  • Helicopter

    Shaheen Mongam

    Member

    Updated: Oct 26, 2024
    Views: 1.4K
    Most of the Toy RC helicopters available in market are of having a different rotor mechanism compared to original big helicopters. In toy RC helicopters, there will be two rotor blades rotating in opposite directions, while in real helicopters, there will be one main rotor and a tail rotor (these systems are for cancelling counter action and also for direction controls). Why in big size helicopters, the two rotor systems are not used (which I think is cheaper and simpler)
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  • Ramani Aswath

    Member • Jul 10, 2016

    <a href="https://en.wikipedia.org/wiki/Coaxial_rotors" target="_blank" rel="nofollow noopener noreferrer">Coaxial Rotors</a>
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  • Shaheen Mongam

    Member • Jul 10, 2016

    A.V.Ramani
    <a href="https://en.wikipedia.org/wiki/Coaxial_rotors" target="_blank" rel="nofollow noopener noreferrer">Coaxial Rotors</a>
    thanks
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  • FlyingMachine

    Member • Mar 9, 2017

    toy copters mostly fly straight. Real copters need Yaw control. Tail rotor takes that function. Since it is at a distance from the Main rotor Axle we get the lever advantage less force to YAW. Speed and tail rotor blade angle of attack determined the yaw turning radius and direction of turn.
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  • Pravin_blacklion

    Member • Mar 28, 2017

    Shaheen Mongam
    Most of the Toy RC helicopters available in market are of having a different rotor mechanism compared to original big helicopters. In toy RC helicopters, there will be two rotor blades rotating in opposite directions, while in real helicopters, there will be one main rotor and a tail rotor (these systems are for cancelling counter action and also for direction controls). Why in big size helicopters, the two rotor systems are not used (which I think is cheaper and simpler)
    In case of coaxial rotor, the design of the rotor hub and its assembly is complex. Also, it is more prone to mechanical faults and possible failure.

    In RC helicopters, the pitch of the blades is constant while in real world helicopters we should be able to change the pitch of blades for control of flight. Incorporating such designs makes it increasing complex and costly.

    Albeit, Coaxial Rotor Helicopters will rule the future though because of its many advantages like minimum vibration, fail safe anti torque system, blade stall etc.
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