RaceKraft Props are made to perform and withstand todays rigorous FPV races. Combined with the unique color combinations, and resilient plastic combinations.
Each propeller model was designed specifically— here we will use the 5051 model to describe that process:
Despite it's simplistic appearance, the Racekraft 5051 was designed from the ground up to maximize efficiency at high rates of speed. Custom Computational Fluid Dynamics (CFD) programs were developed to design the RK 5051. A Vortex Lattice Method was used to develop the flow around the propeller which performance estimates can be derived from. Viscous effects are accounted for using airfoil 2D section data gathered from NACA databases or derived from using 2D airfoil programs such as XFOIL. A design for maximum efficiency is ensured by manipulating blade geometry to meet the Betz condition. Betz condition requires each shedding vortex at each station along the blade needs to shed off as a perfect helical screw. This condition allows convergence on one blade geometry for one design point. Our CFD program takes in inputs to produce the geometry of the propeller. These inputs are speed of the multirotor, RPMs, Power, angle incidence with the flow, number of blades, and diameter. The optimum geometry from the program is then inputted into a CAD software and a 3D solid model is drawn.
This design process allows for the design of propellers optimum for certain use cases. The RK 5051 prop model was made specifically for the multirotor racer, when a fast propeller with control up at high rates of speed is needed. A Racer’s propeller also needs to be extremely durable and not break when hitting other racers in the air or gates to stay in the air longer. The RK 5051 is designed to operate at 60 mph at 40 degree incidence with the flow at roughly half throttle with a 2205 - 2206 2300kv motor.
The number 5051 is derived from the propellers diameter (5.0”) and the propellers advance ratio (J = 0.51) which results in the 5051 indicator. "Advance ratio" is used over the conventionally used "static pitch" since static pitch is rather meaningless in the design process. Advance ratio is the ratio of the speed the multirotor is moving at to the top speed of the propeller. The design is optimum to a specific advance ratio, in this case 0.51. This tells the customer the intended purpose of the propeller. Higher advance ratios will be optimum for faster flying scenarios, compared to a low advance ratio which will be more optimum for lower speed flying.
The RK 5051 will give you the power, control, and durability you need to win a race.
Why use propellers from any other manufacturer?
Come in and pick up your Racekraft props at BTV Drones today- open from 3-8pm M-F and 12-6pm on Saturdays.