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April 16th, 2018, 11:04 PM   #1
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how aeroplane make stability

hello
how aeroplane make stability in air
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April 17th, 2018, 01:00 PM   #2
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Design of wing and control surfaces. Google "airplane stability".
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April 17th, 2018, 02:21 PM   #3
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Quote:
Originally Posted by mathman View Post
Design of wing and control surfaces. Google "airplane stability".
Actually that's not enough for most aircraft.

The tailplane is needed to provide rotational stability.
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April 17th, 2018, 11:06 PM   #4
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does it use pid controller
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April 18th, 2018, 04:08 PM   #5
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Quote:
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Actually that's not enough for most aircraft.

The tailplane is needed to provide rotational stability.
Quibble: To me the moving parts of the tail are control surfaces.
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April 18th, 2018, 07:39 PM   #6
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does it use PID CONTROLLER?
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April 18th, 2018, 11:20 PM   #7
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Quote:
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Quibble: To me the moving parts of the tail are control surfaces.
My comment has nothing to do with moving parts.

It is to do with the fact that there is a difference in line of action between the Lift and the Load which creates a couple tending to rotate the aircraft, about a horizontal axis. This is different from the couple about a vertical axis experienced in helicopters and balanced by a tail rotor.

Said couple is balanced by a moment generated by the additional force from the surfaces that comprise the tail plane.
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April 18th, 2018, 11:22 PM   #8
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Older planes use a human brain. There are electronic methods but they don't tend to use PID because you need to control multiple surfaces, sometimes quickly, it's difficult to find PID terms that would work, for fighter planes it'd never work. I do recall that matrix manipulation of some complicated variables can be used, but that was 20 years ago and I hated the course
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April 19th, 2018, 07:58 AM   #9
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then how plane control in air we shakes also then also it move with disturbances
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April 20th, 2018, 12:29 AM   #10
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Good pilot.
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