float input = _internal_gear->_vel;
//    if(_use_couple) {
//        input *= _internal_gear->_couple;
//    }

    float k = 2.f;
    if(_one_way_reversed)
    {
        if(input > 0.f) {
            float dissipated = (input/float(_size) - _vel)/k;
            if(dissipated > 0.f) {
                _power += dissipated;
                _internal_gear->_power -= dissipated;
            }
        }
    }
    else {
        if(input < 0.f) {
            float dissipated = (input/float(_size) - _vel)/k;
            if(dissipated < 0.f) {
                _power += dissipated;
                _internal_gear->_power -= dissipated;
            }
        }
    }