Question on longitudinal static stability of an aircraft

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Discussion Overview

The discussion centers on the longitudinal static stability of aircraft, specifically comparing the effects of larger wings versus smaller wings. It includes considerations of theoretical aspects, potential qualitative and quantitative analyses, and the implications of wing size on stability characteristics.

Discussion Character

  • Homework-related
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants inquire about the longitudinal static stability differences between larger and smaller wings, questioning whether a qualitative or quantitative answer is expected.
  • It is suggested that larger wings generate greater lift at a given forward velocity, which may influence stability in response to perturbations in fluid properties.
  • Participants mention that the moment of inertia increases with wing size, raising questions about its effects on pitch (longitudinal stability) and yaw (directional stability).
  • Links to external resources are provided for further exploration of stability concepts and moment of inertia calculations.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants express different aspects of the question without resolving the overall inquiry into the effects of wing size on longitudinal static stability.

Contextual Notes

Participants are encouraged to show their work for better assistance, indicating that the discussion may be limited by the lack of detailed calculations or specific examples related to the topic.

bourne
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wat will be the longitudinal static stability of an aircraft with a larger wing to a smaller wing?
 
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Thread moved to Homework Help. Please take care to post homework/coursework questions in the Homework Help forums, and not in the general technical forums.

And you must show some of your work in order for us to provide tutorial help. What can you tell us about longitudinal stability? What effects would different shape and size wings have?
 
bourne said:
wat will be the longitudinal static stability of an aircraft with a larger wing to a smaller wing?
Is one expecting a qualitative or quantitative answer.

The larger wing has greater lift for given forward velocity. Then think about the response to perturbations in fluid properties.

Also, the moment of inertia increases with size. What effect does this have on pitch (longitudinal stability) or yaw (directional stability)?

FYI - http://dscb.larc.nasa.gov/Introduction/Controls/index.htm

http://adamone.rchomepage.com/index5.htm
http://adamone.rchomepage.com/index3.htm

http://adg.stanford.edu/aa241/stability/staticstability.html

See also - MIT, Aeronautics and Astronautics, 16.333 Aircraft Stability and Control, Fall 2004 -
http://ocw.mit.edu/OcwWeb/Aeronautics-and-Astronautics/16-333Fall-2004/CourseHome/index.htm

Moment of inertia calculations:
http://blue.utb.edu/tjayp/Courses/PHYS2425F2000/Moment.html
https://www.physicsforums.com/archive/index.php/t-57119.html
http://hypertextbook.com/physics/mechanics/rotational-inertia/
http://em-ntserver.unl.edu/negahban/em223/note19/ex2/ex2.htm
 
Last edited by a moderator:
berkeman said:
Thread moved to Homework Help. Please take care to post homework/coursework questions in the Homework Help forums, and not in the general technical forums.

And you must show some of your work in order for us to provide tutorial help. What can you tell us about longitudinal stability? What effects would different shape and size wings have?

yup. m sorry. i'll surely do tat next time onwards.
 

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