windtunnel-data-reductionlisted

# Wind Tunnel Data Reduction (aerodynamics/wind-tunnel/windtunnel-data-reduction) Use when the task is experimental wind tunnel test data reduction: converting raw balance forces and pressure tap readings into corrected aerodynamic coefficients. The leaf covers tare and tareshift subtraction, solid and wake blockage, wall interference, streamline curvature, Reynolds number and Mach corrections, coefficient reduction referenced to planform area and reference length, and uncertainty estimation from repeated runs. It is the experimental counterpart to the computational leaves (cfd/panel-method, airfoil/xfoil-analysis): those compute aerodynamics, this one reduces measured data. ## Domain quick reference - Tare: the support system (sting, strut, brackets) carries load even with the model unloaded. Record a tare run with the model removed or at zero lift and subtract it from every balance reading. A model at zero angle of attack whose raw drag equals its tare reads zero net drag after subtraction. - Tareshift: the tare itself changes with angle of attack because the support loads the balance differently as the model pitches. Bracket the polar with tare runs at a low and a high angle and interpolate the tare linearly at each measurement angle. - Solid blockage: the model volume displaces air in the closed test section, accelerating the flow around the model. The solid blockage increment is eps_sb = K1 * (model volume / test section volume), with K1 = 0.96 for