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- Keel_effect abstract "In aeronautics, keel effect is the result of the sideforce-generating surfaces being above (or below) the center of mass (which coincides with the center of gravity) in any aircraft. Examples of such surfaces are the vertical stabilizer, rudder, and parts of the fuselage. When an aircraft is in a sideslip, these surfaces generate sidewards lift forces. If the surface is above or below the center of gravity, the sidewards lift forces generate a rolling moment. This "rolling moment caused by sideslip" is "dihedral effect". Keel effect is the contribution of these side forces to rolling moment (as sideslip increases), i.e. keel effect is the contribution of the side forces to dihedral effect. Sideforce producing surfaces above the center of gravity will increase dihedral effect, while sideforce producing surfaces below the center of gravity will decrease dihedral effect.Increased dihedral effect (helped or hindered by keel effect) results in a greater tendency for the aircraft to return to level flight when the aircraft is put into a bank. Or, reduces the tendency to diverge to a greater bank angle when the aircraft starts wings-level. Keel effect is also called "Pendulum Effect" because a lower center of gravity increases the effect of sideways forces (above the center of gravity) in producing a rolling moment. This is because the moment arm is longer, not because of gravitational forces. A low center of gravity is like a pendulum (which has a very low center of gravity).References:Illman, Paul; The Pilot's Handbook of Aeronautical Knowledge; Fig 2.34".
- Keel_effect wikiPageID "13825072".
- Keel_effect wikiPageLength "1837".
- Keel_effect wikiPageOutDegree "9".
- Keel_effect wikiPageRevisionID "317116483".
- Keel_effect wikiPageWikiLink Angle_of_sideslip.
- Keel_effect wikiPageWikiLink Category:Aerodynamics.
- Keel_effect wikiPageWikiLink Center_of_gravity_(aircraft).
- Keel_effect wikiPageWikiLink Center_of_gravity_of_an_aircraft.
- Keel_effect wikiPageWikiLink Center_of_mass.
- Keel_effect wikiPageWikiLink Dihedral_(aeronautics).
- Keel_effect wikiPageWikiLink Dihedral_(aircraft).
- Keel_effect wikiPageWikiLink Lift_(force).
- Keel_effect wikiPageWikiLink Slip_(aerodynamics).
- Keel_effect wikiPageWikiLinkText "keel effect".
- Keel_effect wikiPageWikiLinkText "pendulum effect".
- Keel_effect hasPhotoCollection Keel_effect.
- Keel_effect subject Category:Aerodynamics.
- Keel_effect hypernym Result.
- Keel_effect type Dynamic.
- Keel_effect comment "In aeronautics, keel effect is the result of the sideforce-generating surfaces being above (or below) the center of mass (which coincides with the center of gravity) in any aircraft. Examples of such surfaces are the vertical stabilizer, rudder, and parts of the fuselage. When an aircraft is in a sideslip, these surfaces generate sidewards lift forces. If the surface is above or below the center of gravity, the sidewards lift forces generate a rolling moment.".
- Keel_effect label "Keel effect".
- Keel_effect sameAs m.03ckdpd.
- Keel_effect sameAs Q6382729.
- Keel_effect sameAs Q6382729.
- Keel_effect wasDerivedFrom Keel_effect?oldid=317116483.
- Keel_effect isPrimaryTopicOf Keel_effect.