Kyiv under massive attack by new Geran-5 rocket drones The attack by these drones is ongoing for the second day. They are built using a conventional aerodynamic design based on the Iranian Karrar prototype and differ significantly from previous piston-engine models of this series (the Shahed-136 "flying wings"), according to enemy sources. Engine: Chinese Telefly TF-TJ2000A turbojet. Cruising speed: 450 to 600 km/h (some peak estimates reach 800 km/h).