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 April 16th, 2018, 11:04 PM #1 Senior Member   Joined: Nov 2017 From: india Posts: 220 Thanks: 1 how aeroplane make stability hello how aeroplane make stability in air
 April 17th, 2018, 01:00 PM #2 Global Moderator   Joined: May 2007 Posts: 6,494 Thanks: 577 Design of wing and control surfaces. Google "airplane stability".
April 17th, 2018, 02:21 PM   #3
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Quote:
 Originally Posted by mathman 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.

 April 17th, 2018, 11:06 PM #4 Senior Member   Joined: Nov 2017 From: india Posts: 220 Thanks: 1 does it use pid controller
April 18th, 2018, 04:08 PM   #5
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Quote:
 Originally Posted by studiot 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.

 April 18th, 2018, 07:39 PM #6 Senior Member   Joined: Nov 2017 From: india Posts: 220 Thanks: 1 does it use PID CONTROLLER?
April 18th, 2018, 11:20 PM   #7
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Quote:
 Originally Posted by mathman 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.

 April 18th, 2018, 11:22 PM #8 Senior Member   Joined: Apr 2014 From: UK Posts: 867 Thanks: 315 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
 April 19th, 2018, 07:58 AM #9 Senior Member   Joined: Nov 2017 From: india Posts: 220 Thanks: 1 then how plane control in air we shakes also then also it move with disturbances
 April 20th, 2018, 12:29 AM #10 Senior Member   Joined: Apr 2014 From: UK Posts: 867 Thanks: 315 Good pilot. Thanks from studiot

 Tags aeroplane, make, stability

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