As Yak-52 is not really suitable for any combat simulation and is a very special DCS product, I can show the backstage of the tuning and verification process regarding flight test results. (Our great thanks to Konstantin Borovik and "The First Flight" club!) And this will be a debut unveiling the measured and simulated flight parameters - numerical and coincided at one graph. The first post will be about its roll rate. The test was a pure aileron roll starting from a climb to perform 4 full