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"If the horizontal lines and the dot are above the horizon line, the aircraft is gaining altitude and is pitched upward."
just because the nose is pointing upward it does not mean you are gaining altitude, you also need enough airspeed am i right? (flight simulator user :) )
"In 1742 or 1743, the Englishman John Serson presented a fast spinning top, whose upper surface perpendicular to the axis of its rotation was a circular plate of polished metal.
When the top was set in motion, the plain part of its surface became horizontal while maintaining this behaviour even in a disturbing environment like on swaying ships. With this, J. Serson proposed a solution of the problem of finding a satisfactory horizon for use in sextant observations at sea when there was fog around the sea horizon. Herefrom the artificial horizon originates.
Unfortunately, J. Serson lost his life in 1744 during a test campaign at sea. It took about 140 years before his invention was revived in France by Admiral G. Fleuriais."
This is from Wagner, "200 Years of Inertial Navigation"
Pitch and bank are ANGLES. Roll is a RATE (degrees/time). The AI shows pitch and bank only, not roll.
Roll rate can be implied by the pilot by watching how fast the bank angle changes, but the roll rate is not directly shown on the AI.
The (older) turn indicator shows turn rate only. The modern turn coordinator shows turn rate + roll rate. As you enter a turn, the plane has a high roll rate and low turn rate. When the turn is established (and held with constant bank angle) roll rate is zero and the indicator shows turn rate + (zero) roll rate.
Note that if the aircraft is rolling about the longitudinal axis and not turning, the turn indicator will read zero, while the turn coordinator will register the changing roll rate.
A standard rate turn is 360 degrees in 2 minutes (for slower aircraft). The turn coordinator (or turn indicator) has index marks for a standard rate turn. A quick formula for bank angle to effect a standard rate turn is:
15% of airspeed (in knots) = bank angle.
For 90 Kt. bank angle = about 13.5 deg. For 120 Kt. vabk angle = 18 deg.
The AI is used to set bank to a specific angle, then the turn coordinator is used to monitor the quality of the turn via roll rate. — Preceding unsigned comment added by 69.239.146.121 ( talk) 19:07, 2 June 2013 (UTC)
Reference 3 is not available anymore, but there is an archive link: http://web.archive.org/web/20141029214654/http://www.flightglobal.com/blogs/learmount/2009/02/which_way_is_up_for_eastern_an/
Can someone who knows more about the syntax than me please replace it? -- MrBurns ( talk) 01:10, 15 September 2015 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Attitude indicator. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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Cheers.— cyberbot II Talk to my owner:Online 19:02, 31 March 2016 (UTC)
The following editorial comments were inserted in the article - see the diff. I have removed the following comments from the article: Dolphin ( t) 11:19, 26 November 2019 (UTC)
So an Attitude Indicator does NOT work by measuring the direction of gravitational pull? I thought it was a free-floating ball with the bottom full of something heavy. Wouldn't a gyroscope become inaccurate due to the curvature of the Earth? Algr ( talk) 01:09, 19 October 2021 (UTC)
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"If the horizontal lines and the dot are above the horizon line, the aircraft is gaining altitude and is pitched upward."
just because the nose is pointing upward it does not mean you are gaining altitude, you also need enough airspeed am i right? (flight simulator user :) )
"In 1742 or 1743, the Englishman John Serson presented a fast spinning top, whose upper surface perpendicular to the axis of its rotation was a circular plate of polished metal.
When the top was set in motion, the plain part of its surface became horizontal while maintaining this behaviour even in a disturbing environment like on swaying ships. With this, J. Serson proposed a solution of the problem of finding a satisfactory horizon for use in sextant observations at sea when there was fog around the sea horizon. Herefrom the artificial horizon originates.
Unfortunately, J. Serson lost his life in 1744 during a test campaign at sea. It took about 140 years before his invention was revived in France by Admiral G. Fleuriais."
This is from Wagner, "200 Years of Inertial Navigation"
Pitch and bank are ANGLES. Roll is a RATE (degrees/time). The AI shows pitch and bank only, not roll.
Roll rate can be implied by the pilot by watching how fast the bank angle changes, but the roll rate is not directly shown on the AI.
The (older) turn indicator shows turn rate only. The modern turn coordinator shows turn rate + roll rate. As you enter a turn, the plane has a high roll rate and low turn rate. When the turn is established (and held with constant bank angle) roll rate is zero and the indicator shows turn rate + (zero) roll rate.
Note that if the aircraft is rolling about the longitudinal axis and not turning, the turn indicator will read zero, while the turn coordinator will register the changing roll rate.
A standard rate turn is 360 degrees in 2 minutes (for slower aircraft). The turn coordinator (or turn indicator) has index marks for a standard rate turn. A quick formula for bank angle to effect a standard rate turn is:
15% of airspeed (in knots) = bank angle.
For 90 Kt. bank angle = about 13.5 deg. For 120 Kt. vabk angle = 18 deg.
The AI is used to set bank to a specific angle, then the turn coordinator is used to monitor the quality of the turn via roll rate. — Preceding unsigned comment added by 69.239.146.121 ( talk) 19:07, 2 June 2013 (UTC)
Reference 3 is not available anymore, but there is an archive link: http://web.archive.org/web/20141029214654/http://www.flightglobal.com/blogs/learmount/2009/02/which_way_is_up_for_eastern_an/
Can someone who knows more about the syntax than me please replace it? -- MrBurns ( talk) 01:10, 15 September 2015 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Attitude indicator. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{
Sourcecheck}}
).
An editor has reviewed this edit and fixed any errors that were found.
Cheers.— cyberbot II Talk to my owner:Online 19:02, 31 March 2016 (UTC)
The following editorial comments were inserted in the article - see the diff. I have removed the following comments from the article: Dolphin ( t) 11:19, 26 November 2019 (UTC)
So an Attitude Indicator does NOT work by measuring the direction of gravitational pull? I thought it was a free-floating ball with the bottom full of something heavy. Wouldn't a gyroscope become inaccurate due to the curvature of the Earth? Algr ( talk) 01:09, 19 October 2021 (UTC)