A double trapezoidal rotor blade with a radius at the blade tip has a positive impact on the lift distribution because of its optimized geometry. This shape promotes a more uniform distribution of aerodynamic forces along the blade's span. The double trapezoidal design aids in reducing the large variations in lift that typically occur between the root and the tip of the blade. Additionally, incorporating a radius at the blade tip helps minimize vortices and drag, thereby improving the overall efficiency and performance of the rotor blade. These factors collectively contribute to a more stable and efficient lift generation across the rotor blade.