If my understanding of the russian PPRuNe equivalent is correct the Voronezh (Russian) built An-148 have issues with the speed data in ADS-B, that's why FR24 interpolates the speed between datapoints - which naturely provides unreliable data (especially in a turn). If I understood correctly the Ukrainian built An-148's don't exhibit this behaviour.
Last edited by damirc; 12th Feb 2018 at 17:32.
Reason: has -> have