World Library  
Flag as Inappropriate
Email this Article

Stagger (aviation)

Article Id: WHEBN0015858281
Reproduction Date:

Title: Stagger (aviation)  
Author: World Heritage Encyclopedia
Language: English
Subject: Biplane, Fairey Fox, Heinkel He 60, Beechcraft Model 17 Staggerwing, Hawker Nimrod, Vickers F.B.5, Vickers Vildebeest, Fokker D.I, Blackburn Baffin, Armstrong Whitworth Ape
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Stagger (aviation)

Stagger
Positive wing stagger of a de Havilland Tiger Moth


In aviation, stagger is the horizontal positioning of a biplane, triplane, or multiplane's wings in relation to one another.

An aircraft is said to have positive stagger, or simply stagger, when the upper wing is positioned forward of the lower (bottom) wing,[1] such as the de Havilland Tiger Moth or Stearman. Conversely, an aeroplane is said to have negative stagger in unusual cases where the upper wing is positioned behind the lower wing,[1] as in the Sopwith Dolphin or Beech Model 17 Staggerwing. An aircraft with the wings positioned directly above each other is said to have unstaggered wings, as in the Sopwith Cuckoo or Vickers Vildebeest.

Measurement

The value sometimes expressed as a distance, s say, but it may also be written as a fraction or percentage of the 'gap' (distance g between wings), i.e. s/g. It may also be presented as an angle equal to tan−1(s/g). The Gloster TSR.38 had a stagger of 0.91 m and a gap of 2.0 m,[2] so the stagger might be written as 0.91 m, 0.455, 45.5% or 24.5°. s is the distance from the leading edge of the upper wing along its chord to the point of intersection of the chord with a line drawn perpendicularly to the chord of the upper wing at the leading edge of the lower wing, all lines being drawn in a plane parallel to the plane of symmetry.[3]

Effects

As a general rule, there is a tendency for the upper wing to contribute a greater proportion of the total lift than the lower with positive stagger, and less with negative stagger. Increase in positive stagger also tends to move the centre of lift forward on the upper wing and backward on the lower wing. When unstaggered, the centres of lift for upper and lower wings are almost coincidental.[4]

Positive stagger is by far the most common, as this positioning of the upper wing(s) allows better visibility for the crew as well as increased aircraft longitudinal stability, aerodynamic efficiency and maximum lift.[5]

See also

References

External links

  • website.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.