An unbalanced fan sounds terrible and yet many modellers don’t realise just how easy it is to get a fan to sound like a turbine. Most model aviation clubs are close to residential dwellings and so noise must be reduced. Many clubs have adopted strict noise policies in order to keep the surrounding neighbourhood happy. The reason we balance an EDF is similar to the reason we balancing a propeller, sound, efficiency and to minimise the wear and tear on the sensitive components in your model aircraft. No doubt you’ve heard the sound of a well-balanced fan and you’ll agree with me that it’s just a beautiful thing.
There are many ways to balance an EDF fan and in this article, I’ll cover two reasonably easy, yet, effective methods.
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