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2. Computer fan control - Wikipedia

   en.wikipedia.org/wiki/Computer_fan_control

   Increasing the voltage [4] over the default 12 V can be achieved by e.g. connecting the −12 V or −5 V power line instead of the ground wire in the fan connector, and by connecting the 5 V power line in the +12 V input of the fan connector. Through this procedure, 10, 17 and 24 V voltages can be achieved, with voltages exceeding 12 V being ...

3. Revolutions per minute - Wikipedia

   en.wikipedia.org/wiki/Revolutions_per_minute

   A typical 80 mm, 30 CFM computer fan will spin at 2600 rpm – 3000 rpm (43 Hz – 50 Hz) on 12 V DC power. A millisecond pulsar can have near 50 000 rpm (833 Hz). A turbocharger can reach 1 000 000 rpm (16.6 kHz), while 100 000 rpm – 250 000 rpm (1 kHz – 3 kHz) is common.

4. CFM International CFM56 - Wikipedia

   en.wikipedia.org/wiki/CFM_International_CFM56

   The CFM56 is a high-bypass turbofan engine (most of the air accelerated by the fan bypasses the core of the engine and is exhausted out of the fan case) with several variants having bypass ratios ranging from 5:1 to 6:1, generating 18,500 to 34,000 lbf (80 kN to 150 kN) of thrust. The variants share a common design, and differ only in details.

5. Actual cubic feet per minute - Wikipedia

   en.wikipedia.org/wiki/Actual_cubic_feet_per_minute

   Actual cubic feet per minute (ACFM) is a unit of volumetric flow. It is commonly used by manufacturers of blowers and compressors. [1] This is the actual gas delivery with reference to inlet conditions, whereas cubic foot per minute (CFM) is an unqualified term and should only be used in general and never accepted as a specific definition without explanation.

6. Specific fan power - Wikipedia

   en.wikipedia.org/wiki/Specific_fan_power

   In reality the fan system efficiency is often in the range 0 to 60% (i.e. <); it is lowest for small fans or inefficient operating points (e.g. throttled flow or free-flow). The efficiency is a function of the total losses in the fan system, including aerodynamic losses in the fan, friction losses in the drive (e.g. belt), losses in the ...

7. CFM International LEAP - Wikipedia

   en.wikipedia.org/wiki/CFM_International_LEAP

   18 blade fan. The LEAP [13] incorporates technologies that CFM developed as part of the LEAP56 technology acquisition program, which CFM launched in 2005. [14] The engine was officially launched as LEAP-X on 13 July 2008. [9] It is intended to be a successor to the CFM56. In 2009, COMAC selected the LEAP engine for the C919. [15]

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. 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."