The R44 is the further development of the R22 and is also powered by a piston engine. Unlike most other helicopters, it was designed from the ground up as a civil helicopter. Company founder Frank Robinson had success with this: The Robinson R44 is currently the best-selling civil helicopter worldwide. The R44 has space for four people, one of whom is the PIC “Pilot in Command”. One of the reasons why the R44 is so popular for sightseeing flights is that everyone has a window seat. Every passenger can press their nose to the window and enjoy the view.