Automotive fans and different blades used in them

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Products searched through sell auto parts has the highest price concession and the best quality in the market. This article is all about radiators your vehicle constitutes. The radiator fan has an important job in the engine compartment. It can push air through the radiator core or pull it through. It must cool the antifreeze that circulates through the block and head passages and reduces the engine temperature. Fan designs have specific purposes for different sized vehicles and profiles. They all have the same basic function, which amounts to drawing in extra air, but especially at low rpm conditions and times when the vehicle sits at an idle.

Manual Fixed Fan

It is a four blade pattern and oldest of the kind. The fan is run by the direct pulley which is connected to the crankshaft. As the engine starts manual fixed fan starts spinning constantly and never stopping. Therefore, it draws air, pulling it through the radiator from the outside, during slow and fast speeds. It has no controlling clutch to disengage it, nor does it have a variable pitch feature on its blades.

The Thermal Sensing Clutch Fan

The clutch fan is comprised of a disk-like housing that forms the hub of the fan and sits in front of the water pump. These fans work when the engine rpm lowers; the sensor picks up the low rpm signal and engages the clutch, which locks with the fan. When the car has approached higher speeds where the air has a “ramming” effect on the radiator, the fan shuts off because it does not have to be used. The unneeded drag from the engine is saved and hence saving the horsepower of the engine.

Electric Fans

These are very popular and compact type of fans which are used in small import and compact cars, where size is the main consideration. These are either mounted either in front of the grill to push air or behind the radiator to pull in air. They can be mounted at off-angles in the engine compartment, so long as they assist in cooling the radiator. Most of the electric fans come with thermal-sensors that activate the fan when it reaches a hot temperature. There are electric fans can push over 3,000 cubic feet of air per minute and have ten blades.

Flex Fans

Flex fan blades flatten once the fan reaches a certain RPM. This reduces the resistance of the blades to almost zero and cutting down energy consumption in the process. Once the engine slows down, the blades return to their original state and work to keep the engine cool.

Centrifugal Clutch Fan

These fans speed is dependent on the speed of the engine to engage or disengage it. As the engine speeds up, the clutch allows the fan to partially slip, giving back that engine the power it would have used if permanently attached. One of the problems here might be with a vehicle stuck in the mud with a high-revving engine, which would trigger a no-fan condition, thus over-heating the engine since the vehicle cannot move through the airstream.


The engine is the heart of any vehicle, and automotive fans serve as the oxygen for the smoother operation of the engine. So they are very much necessary to keep your engine cool, keeping your engine not getting hot.

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