The fundamental design principles behind rotary-wing aircraft date back to the Renaissance, with some of the earliest-known designs belonging to Leonardo da Vinci. Naturally, technology has ...

The Throttle on the Collective Control feeds power to match the blade pitch. And, finally, foot pedals control the tail rotor to point the helicopter in a particular direction. Dealing with all ...

Rotors also include the ability to vary the blade pitch as it rotates cyclically, enabling control of the aircraft attitude using just the rotor. Thus, rotorcraft — helicopters, autogyros ...

The FAA sought information from aircraft owners and operators about severe vibrations, while the blade manufacturer alerted ...

Whereas helicopters like the UH-60 Black Hawk have ... transmitting inputs via a swashplate mechanism to change the blades’ pitch. The upper rotor mirrors this setup but in an inverted ...

NASA says that the helicopter made hard contact with a sand-ripple slope, causing it to pitch and roll. The sudden change in altitude was too much for the rotor blades, and four of them broke off ...

In other words, a crash landing that likely made Ingenuity pitch and roll on a sandy Martian slope. That snapped the rotor blades, with one blade completely separating from the helicopter.

That forces the helicopter to rotate around in roll and pitch, and because this rotor ... and that puts a lot of bending moments on the blades." Those bending moments, or forces, were extreme ...