When measuring, do not include the cooling tanks on each side or top and bottom of the radiator. A fan must cover as much of the radiator core as possible. Here are some factors Maradyne considers important when choosing a electric fan: Validation of a fan design comes in the form of on-track and off-road racing teams. Maradyne says its tests are made at various static pressures to measure airflow, speed, torque, and amperage draw. This testing allows performance to be further optimized. Sealed motor that can withstand dust and humidity.Theses rings also reduce noise by preventing harmonic vibrations that can occur when individual blades rotate at high speeds. Smaller 12 to 14-inch fans have one outer ring preventing blade flex and distortion. For example, two rings (one outer and one inner) are used on Maradyne’s 16-inch fans to add stiffness to the blades and prevent them from flexing rearward into the shroud at high rpm. Concentric rings to tie fan blade tips together.Amperage draw to achieve maximum performance using the least amount of current.Balanced blades to prevent additional stress and wear on the motor, which can shorten its lifespan.Essential aspects of high performance fan design include: The next step is to make the fan design fully functional by optimizing fan blade pitch at the static pressure and rpm conditions that replicate most automotive applications. Taking these factors into account, Maradyne engineers calculate the optimal angle of airflow through its fan at three points-the hub, the middle, and outer blade tips. Factors that Impact Fan PerformanceĪccording to Maradyne, factors such as blade width, blade pitch angle, number of blades, and blade velocity impact a fan’s overall performance. Maradyneuses that same racing technology to build electric fans for daily drivers, street rods, muscle cars and off-road vehicles. Maradyne electric fansare spec equipment for several NASCAR Nationwide and Cup Series teams-a demanding application where cooling is critical to winning. We contacted the engineers at Maradyneto learn more about what makes good electric fan design–and what you should look for when choosing a fan. In addition, replacing an engine-driven fan can increase horsepower and improve fuel economy by eliminating the drag of the engine-driven fan. The key advantage of an electric fan is increased engine cooling at idle when it is most needed. Without airflow, a radiator is not much more than a holding tank for hot coolant. Optimizing the air movement across the fins of the radiator is essential to prevent overheating-a task that electric fans can often handle better than engine driven fans. A well-designed electric cooling fanis critical to prevent engine overheating-a good fan will provide the airflow needed to dissipate excess engine heat with the least impact on horsepower and fuel economy. The heat generated from stop-and-go-driving, racing, and towing can kill engines.
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