Today I observed a strange flight on Flightradar24, a helicopter departing HAM and traveling at altitudes up to 29000ft and speeds up to 547kts which seems to be way beyond the specifications of a helicopter.1
The details in normal resolution for better readability:
About 17:00 the symbol didn't move anymore and the helicopter was now down on 2875ft and 177kts near FKB (Karlsruhe Baden-Baden) and then disappeared.
I checked the registration and is indeed the Agosta Westland AW139 shown on the picture.
Does anyone have an idea how this could be. Usually, the data on Flightradar seems to be reliable, but a helicopter at 547kts seems odd.
1. According to Wikipedia the Agosta Westland AW139 can travel up to 306km/h (165kts) and has a service ceiling of 20000ft.
edit: speed was 547kts, not 247, added image with details.