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2. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   The whole fan can be secured directly onto the ceiling mounting bracket; this is often referred to as a dual-mount or tri-mount. Other components, which vary by model and style, can include: A downrod, a metal pipe used to suspend the fan from the ceiling. Downrods come in many lengths and widths, depending on the fan type.

3. High-volume low-speed fan - Wikipedia

   en.wikipedia.org/wiki/High-volume_low-speed_fan

   A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."

4. Axial fan design - Wikipedia

   en.wikipedia.org/wiki/Axial_fan_design

   An axial fan is a type of fan that causes gas to flow through it in an axial direction, parallel to the shaft about which the blades rotate. The flow is axial at entry and exit. The fan is designed to produce a pressure difference, and hence force, to cause a flow through the fan. Factors which determine the performance of the fan include the ...

5. Fan disk - Wikipedia

   en.wikipedia.org/wiki/Fan_disk

   The one shown in the photo is over 31 inches (1.2 m) in diameter, and rotates up to 3800 rotations per minute (RPM). [3] Fan disks must withstand the centrifugal force of the attached fan blades. Because of their size and weight, a failed fan disk can severely damage an aircraft, as happened with United Airlines Flight 232 in 1989. [4]

6. Home Depot - Wikipedia

   en.wikipedia.org/wiki/Home_Depot

   This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. American multinational home improvement supplies retailing company The Home Depot, Inc. An aerial view of a Home Depot in Onalaska, Wisconsin Company type Public Traded as NYSE: HD DJIA component S&P 100 component S&P 500 component Industry Retail (home improvement) Founded February 6 ...

7. Helicopter rotor - Wikipedia

   en.wikipedia.org/wiki/Helicopter_rotor

   An example of the effect of rotor blade number is the UH-72 (EC145 variant); the A model had four blades, but the UH-72B was changed to five blades which reduced vibration. [24] Other blade numbers are possible, for example, the CH-53K , a large military transport helicopter has a seven blade main rotor.