GES Engineering’s Indigenisation Efforts Continue with Extractor Fan Designed for Armoured Vehicles

16 Ocak 2019

Through a variety of design and development activities, GES Engineering continues its efforts to indigenise various subsystems used by the Turkish defence and aerospace sector. One of the latest steps taken by the company in this regard is the extractor fan developed for use in armoured vehicles equipped with weapon turrets. A wholly GES Engineering designed and developed product, the extractor fan successfully passed its functional tests on November 1 in a test run held with the participation of FNSS officials.


The extractor fan, which was developed upon a request from FNSS, prevents the accumulation of toxic gunpowder gases in the armoured vehicle’s weapon turret that are emitted following the firing of ammunition, causing potential harm to the personnel inside.  During the tests, a comparison was made between the extractor fan currently used by FNSS and the one developed by GES Engineering, based on such parameters as flow rate, current drawn from the power source, number of revolutions per minute and the level of noise. The GES Engineering solution was found to be superior to its rival in each of these test criteria.

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High Performance Brought by Fan Blade Design

GES Engineering’s extractor fan enjoys a far better optimised form, enabling higher performance with a lower number of revolutions. This ensures the fan is less noisy, while also reducing the current drawn from the armoured vehicle’s batteries, meaning more power is available to feed other systems on the vehicle. The new fan also generates a higher air flow rate, meaning that it has to operate for a shorter period to extract a fixed amount of gas to the vehicle’s exterior.


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These improvements were made possible by GES Engineering’s approach to the fan blade. When designing the blades of the fan, GES Engineering followed a similar process to the one adopted in the design of wing profiles (or airfoils) to enhance blade efficiency. Prior to prototype production, the airflow generated by the fan was investigated using computational fluid dynamics. The product has passed EMI/EMC tests, and unlike foreign-sourced fans, has been designed taking into account the final location in which it will be positioned aboard the vehicle.

GES Engineering has also indigenised the track adjuster system used on tracked vehicles to adjust track tension, and the product has received full marks following tests aboard various vehicles.



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