design helps to reduce blade tip vortex and the light weight of the propeller means it has a smaller moment of inertia and fast response time.

Gemfan designers use CATIA modeling software and Ansys Fluent to design their Flash propeller airfoils and blade style. Combining the most effective airfoils with different motors to get the most iterations on their design. Testing factors such as surface pressure, airfoil optimization, lift force, resistance, and torque have resulted in the Flash series - made just for racing.

Specifications
Item name: Flash 2540 3-blade propeller
Size: 2540, 2.4x4
Material: PC
Weight: 1g
Mounting hole: 1.5mm
Paddle size: 9.9mm
Hub thickness: 5mm

Includes
4x Gemfan Flash 2540 Durable 3 Blade CW
4x Gemfan Flash 2540 Durable 3 Blade CCW