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Master the Flow: understanding aerodynamics in a wind tunnel The aerodynamic performance of a helmet is mainly measured using three key parameters, analyzed during wind tunnel tests (Newton Lab): 1
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Using a low pressure on my kitchen sink sprayer, I held the sprayer over the helmet and let the water rain down onto the area along the top of the face shield
They are quite expensive at Rs 20,000 but if you are going to extensively trek then these will last you for a long time
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