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2. Insect flight - Wikipedia

   en.wikipedia.org/wiki/Insect_flight

   Insect flight. A tau emerald ( Hemicordulia tau) dragonfly has flight muscles attached directly to its wings. Insects are the only group of invertebrates that have evolved wings and flight. Insects first flew in the Carboniferous, some 300 to 350 million years ago, making them the first animals to evolve flight.

3. Fly (clothing) - Wikipedia

   en.wikipedia.org/wiki/Fly_(clothing)

   Fly (clothing) Closed fly on a pair of jeans. A fly (UK: flies) (short for flyers) is a strip of material covering an opening on the crotch area of trousers, closed by a zipper (often), or buttons. On men's garments, the fly always opens on the wearer's right side; on women's garments, it may open either on the left or on the right.

4. Flywheel energy storage - Wikipedia

   en.wikipedia.org/wiki/Flywheel_energy_storage

   NASA G2 flywheel. Flywheel energy storage (FES) works by accelerating a rotor to a very high speed and maintaining the energy in the system as rotational energy.When energy is extracted from the system, the flywheel's rotational speed is reduced as a consequence of the principle of conservation of energy; adding energy to the system correspondingly results in an increase in the speed of the ...

5. Flywheel - Wikipedia

   en.wikipedia.org/wiki/Flywheel

   A flywheel is a mechanical device that uses the conservation of angular momentum to store rotational energy, a form of kinetic energy proportional to the product of its moment of inertia and the square of its rotational speed. In particular, assuming the flywheel's moment of inertia is constant (i.e., a flywheel with fixed mass and second ...

6. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

7. Kinetic energy recovery system - Wikipedia

   en.wikipedia.org/wiki/Kinetic_energy_recovery_system

   A kinetic energy recovery system ( KERS) is an automotive system for recovering a moving vehicle 's kinetic energy under braking. The recovered energy is stored in a reservoir (for example a flywheel or high voltage batteries) for later use under acceleration. Examples include complex high end systems such as the Zytek, Flybrid, [1] Torotrak [2 ...