First Flights with Neil Armstrong (1991)

S03E01 Whirling Wings - Evolution of the Rotorhead

Cierva's innovations in autogyro technology paved the way for advanced models like the BK-117, highlighting the rotorhead's pivotal role in helicopter history. The initial designs of helicopters were intricate and often perilous, with a high risk of malfunction. Pilots required immense focus and bravery to navigate these challenging machines.