4 ms·

This is Bob Hoover (who he mentions) pouring iced tea during a roll. http://www.youtube.com/watch?v=pMWxuKcD6vE http://www.youtube.com/watch?v=pMWxuKcD6vE

moolave 16y ago
This idea was probably taken from Coca Cola the ad wherein a pilot of an F-16 had to do a full roll when the bottle got stuck in the console.
- spitfire 16y ago
  Bob was doing this before the designers of the f-16 were a sparkle in their parents eyes. Bob knew Orville Wright and Charles Lindbergh as friends. youtube up the video of him flying the f-86 sabre if you want to be stunned.
  - mrduncan 16y ago
    The F-86 video: http://www.youtube.com/watch?v=TRt6UnNzR6I http://www.youtube.com/watch?v=TRt6UnNzR6I
jurjenh 16y ago
I do love how he mentions that the difficult part of the tea-pouring-during-a-roll was pouring the tea back-handed... I guess it all comes down to a matter of perception, as with so many things in life.
JesseAldridge 16y ago
I don't really understand how this works. The article mentioned something about inertia... So gravity moves the object in a downward direction... and then, when the plane is flipped, it keeps moving in that direction -- which is now up? I guess that the effect would "wear off" after awhile? So if you kept flying upside down the tea would eventually fall, right?
- JshWright 16y ago
  Pour a glass of water and hold it loosely between your thumb and index finger (tightly enough that it won't fall, but loose enough that it can swing freely). Then take it outside and swing it in a big vertical circle. You'll be surprised how slowly you can swing it while still keeping the water in the glass. Just like the glass of water though, if the plane were to stop rolling, the tea would immediately spill. It has nothing to do with "bending gravity", simply the reactive centrifugal force imparted by the turn itself.
  - mmaunder 16y ago
    Think of the wings as the glass and the fuselage as the tea in the glass. The pilot's glass of tea is imitating what the wings and fuselage that contain the glass are doing. If the pilot turns the plane at the correct rate, it's a 1 G maneuver. If he turns a little too fast (like spinning your arm too fast) the downward acceleration relative to the fuselage becomes greater than 1 G. If he turns too slowly, the downward acceleration is less than 1G and the tea might spill. I use the term downward acceleration because "G Force" is not a term that physicists like to use.
  - kokofoo 16y ago
    Centrifugal force is also used to achieve the concept called artificial gravity, which is the reason why characters in Star Trek walk around like normal in their starships.
    - JeffL 16y ago
      What? No it isn't. http://memory-alpha.org/wiki/Gravity_plating http://memory-alpha.org/wiki/Gravity_plating
    - dmoney 16y ago
      Some sci-fi has cylindrical ships or space stations spun for gravity, but in Star Trek they have "gravity plating", so the ships don't have to spin. A convenient plot device to cover the fact that they didn't have the budget to shoot every episode aboard the vomit comet.

moolave 16y ago

This idea was probably taken from Coca Cola the ad wherein a pilot of an F-16 had to do a full roll when the bottle got stuck in the console.

spitfire 16y ago
Bob was doing this before the designers of the f-16 were a sparkle in their parents eyes. Bob knew Orville Wright and Charles Lindbergh as friends. youtube up the video of him flying the f-86 sabre if you want to be stunned.
- mrduncan 16y ago
  The F-86 video: http://www.youtube.com/watch?v=TRt6UnNzR6I http://www.youtube.com/watch?v=TRt6UnNzR6I

jurjenh 16y ago

I do love how he mentions that the difficult part of the tea-pouring-during-a-roll was pouring the tea back-handed... I guess it all comes down to a matter of perception, as with so many things in life.

JesseAldridge 16y ago

I don't really understand how this works. The article mentioned something about inertia... So gravity moves the object in a downward direction... and then, when the plane is flipped, it keeps moving in that direction -- which is now up? I guess that the effect would "wear off" after awhile? So if you kept flying upside down the tea would eventually fall, right?

JshWright 16y ago
Pour a glass of water and hold it loosely between your thumb and index finger (tightly enough that it won't fall, but loose enough that it can swing freely). Then take it outside and swing it in a big vertical circle. You'll be surprised how slowly you can swing it while still keeping the water in the glass. Just like the glass of water though, if the plane were to stop rolling, the tea would immediately spill. It has nothing to do with "bending gravity", simply the reactive centrifugal force imparted by the turn itself.
- mmaunder 16y ago
  Think of the wings as the glass and the fuselage as the tea in the glass. The pilot's glass of tea is imitating what the wings and fuselage that contain the glass are doing. If the pilot turns the plane at the correct rate, it's a 1 G maneuver. If he turns a little too fast (like spinning your arm too fast) the downward acceleration relative to the fuselage becomes greater than 1 G. If he turns too slowly, the downward acceleration is less than 1G and the tea might spill. I use the term downward acceleration because "G Force" is not a term that physicists like to use.
- kokofoo 16y ago
  Centrifugal force is also used to achieve the concept called artificial gravity, which is the reason why characters in Star Trek walk around like normal in their starships.
  - JeffL 16y ago
    What? No it isn't. http://memory-alpha.org/wiki/Gravity_plating http://memory-alpha.org/wiki/Gravity_plating
  - dmoney 16y ago
    Some sci-fi has cylindrical ships or space stations spun for gravity, but in Star Trek they have "gravity plating", so the ships don't have to spin. A convenient plot device to cover the fact that they didn't have the budget to shoot every episode aboard the vomit comet.