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2. Improved Turbine Engine Program - Wikipedia

   en.wikipedia.org/wiki/Improved_Turbine_Engine...

   The new turboshaft should replace the GE T700.. In December 2006, the U.S. Army's Aviation Applied Technology Directorate (AATD) solicited proposals for the 3000 shp Advanced Affordable Turbine Engine (AATE) free-turbine turboshaft to replace the GE T700 that currently power the UH-60 Black Hawk and AH-64 Apache rotorcraft, leveraging the DoD/NASA/DOE VAATE program. [2]

3. BMW M5 - Wikipedia

   en.wikipedia.org/wiki/BMW_M5

   The BMW M5 is a high-performance variant of the BMW 5 Series marketed under the BMW M sub-brand. It is considered an iconic vehicle in the sports saloon category. [1] [2] The M5 has always been produced in the saloon (sedan, US English) body style, but in some countries the M5 has also been available as an estate (wagon, US English) from 1992 to 1995, from 2006 to 2010, and since 2024.

4. BMW R90S - Wikipedia

   en.wikipedia.org/wiki/BMW_R90S

   The alloy wheels were spoked and wore tubed tyres. The front brake had twin 230 mm disks and ATE callipers; the rear brake was a 200 mm SLS drum. The R90S and the other BMW "/6" series front brakes had an unusual system whereby a master cylinder on the top frame tube was activated by a cable from the front brake lever.

5. Autorotation - Wikipedia

   en.wikipedia.org/wiki/Autorotation

   Since the tail rotor is driven by the main rotor transmission during autorotation, heading control is maintained as in normal flight. Several factors affect the rate of descent in autorotation: density altitude, gross weight, rotor rotational speed, and forward airspeed. The pilot's primary control of the rate of descent is airspeed.

6. Disc brake - Wikipedia

   en.wikipedia.org/wiki/Disc_brake

   On automobiles, disc brakes are often located within the wheel A drilled motorcycle brake disc. The development of disc-type brakes began in England in the 1890s. In 1902, the Lanchester Motor Company designed brakes that looked and operated similarly to a modern disc-brake system even though the disc was thin and a cable activated the brake pad. [4]

7. Retreating blade stall - Wikipedia

   en.wikipedia.org/wiki/Retreating_blade_stall

   There are three general designs. The earliest, and by far, least common design today, is the fully rigid rotor system; the blades are rigidly fixed to the rotor hub but made of a flexible material that allows some degree of flap. Semi-rigid rotor systems have a horizontal hinge at the base of the blades that allow flap as they rotate. By ...