Hello!
The forward propellers help achieve a higher speed. The main rotor can spin slower while the propellers give the aircraft more forward speed so that more lift is created by the rotor disc and stubs. The rotor has to spin slower to avoid it's tips going transonic. This thing can travel at 407 km/h cruise.
Chinooks coming for ya
Two Chinooks overpassing Bremen airport. First time I heard their massive sound
What are these bad boys doing here?
The third one is apssing the tower closeby behind the office building:D
What are these bad boys doing here?
Bremen airport looking in direction tower. You see a bit of the tower roof to the right behind the office building