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2. Rotordynamics - Wikipedia

   en.wikipedia.org/wiki/Rotordynamics

   Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage.

3. Blisk - Wikipedia

   en.wikipedia.org/wiki/Blisk

   Since then, its use has continued to increase in major applications for both compressors and fan blade rotors. Examples include the Rocketdyne RS-68 rocket engine and the General Electric F110 turbofan. The F-35B variant of the Joint Strike Fighter uses blisks to achieve short take-off and vertical landing. [2]

4. Spindle (automobile) - Wikipedia

   en.wikipedia.org/wiki/Spindle_(automobile)

   Spindles or uprights - Jaguar left and Holden Gemini right The wheel spindle in the illustration is colored red. In an automobile, the wheel spindle, sometimes called simply the spindle, is the part of the suspension system that carries the hub for the wheel and attaches to the upper and lower control arms.

5. Autorotation - Wikipedia

   en.wikipedia.org/wiki/Autorotation

   Airflow through a helicopter rotor. Above, the rotor is powered and pushing air downward, generating lift and thrust. Below, the helicopter rotor has lost power, and the craft is making an emergency landing.

6. Tiltrotor - Wikipedia

   en.wikipedia.org/wiki/Tiltrotor

   Since the rotors can be configured to be more efficient for propulsion (e.g. with root-tip twist) and it avoids a helicopter's issues of retreating blade stall, the tiltrotor can achieve higher cruise speeds and takeoff weights than helicopters. A tiltrotor aircraft differs from a tiltwing in that only the rotor pivots rather than the entire wing.

7. Chapman strut - Wikipedia

   en.wikipedia.org/wiki/Chapman_strut

   In 1947 Earle MacPherson patented the MacPherson strut for use on the Chevrolet Cadet. [4] [5] This was the first true strut suspension for cars: the stub axle was rigidly fixed to the strut, thus always keeping the same angle with it, rather than being attached through a swivelling joint as for Stout's Scarab.