Helicopter advance ratio calculatorAdvance ratio is a non-dimensional measure of the flow speed relative to a rotor, within the plane of rotation. It's defined as the ratio of the inplane flow speed \(V_{IP}\) to the rotor tip speed \(\Omega R\). DescriptionThis calculator estimates the advance ratio \(\mu \) of a helicopter main rotor in level flight. EquationsThe following equation is used to estimate the advance ratio. It assumes the flow speed in the plane of the rotor is \( V \cos (\gamma -\theta )\). \[ \mu = \frac{V\cos ( \gamma -\theta )}{\Omega R} \]Many symbols are defined in Helicopter Abbreviations and Symbols. In addition, we use the following symbols here.
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