In aeronautics, the keel effect (also known as the pendulum effect or pendulum stability [1]) is the result of the sideforce-generating surfaces being above or below the center of gravity of the aircraft.

Keel effect is a design feature of aircraft that gives it lateral stability. In other words, the keel effect of an aircraft’s shape will keep it from rolling. Keel effect helps keep the airplane flying straight ahead instead of entering a turn every time it hits a little turbulence.

Jan 1, 2025 · The keel of a sailboat is its primary structural component that extends below the hull. Its main purpose is to provide lateral resistance against the force of the wind on the sails, helping the boat to stay upright and preventing it from drifting sideways (leeway).

Apr 13, 2017 · The keel of a ship (besides shifting the center of gravity below the metacenter) provides a stabilizing side force when the ship rolls. The same is achieved by a tail surface, but in aviation this is called roll damping .

Here, Voconti discusses the science of foil sections, planform shapes, lift and drag characteristics, and bulb and winglet keels. In the next issue, Eric Sponberg will look at keel and rudder engineering and construction, including calculating keelbolt sizes and rudderpost diameters.

Mar 25, 2016 · In a high wing aircraft the center of lift is above the center of gravity. This will not increase stability when the aircraft banks, however, as you rightly say, will help once the aircraft is in a sideslip.

The keel is the bottom-most longitudinal structural element of a watercraft. On some sailboats, it may have a hydrodynamic and counterbalancing purpose as well. The laying of the keel is often the initial step in constructing a ship. In the British and American shipbuilding traditions, this event marks the beginning date of a ship's construction.

There are two main parts to the physics of motion of sailboats: the keel and the sail. Keel: The keel has two main functions 1. It acts as lateral resistance in the water against leeway movement. 2. Keeps the boat upright by countering the sideways force of the sail.

In this post, we’ll explore the role of the keel, its different types, and essential tips for maintaining this crucial part of your sailboat. At its core, the keel has two main functions: to provide stability and to counterbalance the force of the wind on the sails.

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.