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  2. Spin (aerodynamics) - Wikipedia

    en.wikipedia.org/wiki/Spin_(aerodynamics)

    Spin testing is a potentially hazardous exercise, and the test aircraft must be equipped with some spin-recovery device such as a tail parachute, jettisonable ballast, or some method of rapidly moving the center of gravity forward. Agricultural airplanes are typically certificated in the normal category at a moderate weight.

  3. Art Scholl - Wikipedia

    en.wikipedia.org/wiki/Art_Scholl

    He had entered the spin intentionally in order to capture it on film using on-board cameras. Observers watched the plane continue to spin as it descended past the planned recovery altitude. Scholl's last words over the radio were "I have a problem‚ I have a real problem,” after which the plane impacted the ocean about 5 miles (8.0 km) off ...

  4. Stall (fluid dynamics) - Wikipedia

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

    The only dangerous aspect of a stall is a lack of altitude for recovery. Incipient spin & recovery. A special form of asymmetric stall in which the aircraft also rotates about its yaw axis is called a spin. A spin can occur if an aircraft is stalled and there is an asymmetric yawing moment applied to it. [17]

  5. Wind tunnel - Wikipedia

    en.wikipedia.org/wiki/Wind_tunnel

    Vertical wind tunnel T-105 at Central Aerohydrodynamic Institute, Moscow, built in 1941 for aircraft testing Model aircraft in a vertical tunnel showing parachute used to help recovery from a spin. Vertical wind tunnels have a test section with air flowing upwards. Photography is used to record free-flight spin characteristics of aircraft models.

  6. What should you do if you’re still testing positive for COVID ...

    www.aol.com/news/still-testing-positive-covid-19...

    Experts are monitoring increases in COVID-19 cases in the U.S. driven by new, highly infectious variants.So take a moment to make sure you how and when to use at-home COVID tests to help you stay ...

  7. Fluid deprivation test - Wikipedia

    en.wikipedia.org/wiki/Fluid_deprivation_test

    A fluid or water deprivation test is a medical test [1] which can be used to determine whether the patient has diabetes insipidus as opposed to other causes of polydipsia (a condition of excessive thirst that causes an excessive intake of water). The patient is required, for a prolonged period, to forgo intake of water completely, to determine ...

  8. Gadget claims to keep soda from going flat so we put it to ...

    www.aol.com/gadget-claims-keep-soda-going...

    The Jokari Keeper Pump and Pour is an attachment that you add to a 1- or 2-liter bottle of soda to keep it from going flat. Just unscrew the top that your beverage came with and replace it with ...

  9. Water tunnel (hydrodynamic) - Wikipedia

    en.wikipedia.org/wiki/Water_tunnel_(hydrodynamic)

    A water tunnel is an experimental facility used for testing the hydrodynamic behavior of submerged bodies in flowing water. It functions similar to a recirculating wind tunnel , but uses water as the working fluid, and related phenomena are investigated, such as measuring the forces on scale models of submarines or lift and drag on hydrofoils .