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2. Stall (fluid dynamics) - Wikipedia

   en.wikipedia.org/wiki/Stall_(fluid_dynamics)

   Dynamic stall is a non-linear unsteady aerodynamic effect that occurs when airfoils rapidly change the angle of attack. The rapid change can cause a strong vortex to be shed from the leading edge of the aerofoil, and travel backwards above the wing. [38] [39] The vortex, containing high-velocity airflows, briefly increases the lift produced by ...

3. Stabilizer (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Stabilizer_(aeronautics)

   A Boeing 737 uses an adjustable stabilizer, moved by a jackscrew, to provide the required pitch trim forces. Generic stabilizer illustrated. A horizontal stabilizer is used to maintain the aircraft in longitudinal balance, or trim: [3] it exerts a vertical force at a distance so the summation of pitch moments about the center of gravity is zero. [4]

4. Air changes per hour - Wikipedia

   en.wikipedia.org/wiki/Air_changes_per_hour

   Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed and replaced in an hour. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced each hour.

5. Atkinson resistance - Wikipedia

   en.wikipedia.org/wiki/Atkinson_resistance

   One gaul is defined as the resistance of an airway which, when air (of density 1.2 kg/m 3) flows along it at a rate of one cubic metre per second, causes a pressure drop of one pascal. The gaul has units of N·s 2 /m 8, or alternatively Pa·s 2 /m 6. It uses the same basic equation as its Imperial counterpart, but with slightly different ...

6. Flow separation - Wikipedia

   en.wikipedia.org/wiki/Flow_separation

   The fluid exerts a constant pressure on the surface once it has separated instead of a continually increasing pressure if still attached. [4] In aerodynamics, flow separation results in reduced lift and increased pressure drag, caused by the pressure differential between the front and rear surfaces of the object. It causes buffeting of aircraft ...

7. Orange Cat Gets His Own Christmas Tree and He ‘Absolutely ...

   www.aol.com/orange-cat-gets-own-christmas...

   It has an overall 4.6 out of 5-star review. They find the pet activity structure well-built and easy to assemble. They appreciate its attractive design and value for money. Their cats like it and ...

8. NFL playoff scenarios Week 14: Which teams can clinch berths ...

   www.aol.com/nfl-playoff-scenarios-week-14...

   The Lions already became the first NFL team to clinch a playoff spot in Week 14, and they could be followed by the Eagles and Vikings on Sunday.

9. Building airtightness - Wikipedia

   en.wikipedia.org/wiki/Building_airtightness

   The airtightness of a building is often expressed in terms of the leakage airflow rate through the building's envelope at a given reference pressure (usually 50 pascal) [10] divided by the: Heated building volume V. At 50·Pa, it is called the air change rate at 50 Pa and usually noted n 50 (units: h −1). [13] [14] Envelope area A E.