Pitch (aviation) in the context of "Elevator (aeronautics)"

A bipod is a V-shaped portable attachment that helps support and steady a device, usually a weapon such as a long gun or a mortar. The term comes from the Latin prefix bi- and Greek root pod, meaning "two" and "foot" respectively.

Bipods are designed to support the weight of the weapon's front portion and barrel, and provide significant stability against unwanted side-to-side movements (i.e. canting) while allowing free movements pivoting around the transverse axis (pitching). Most modern bipods have foldable and/or telescoping legs, and allow some limited movements around the vertical axis (panning) and even the longitudinal axis (tilting).

A conventional take-off and landing (CTOL), also known as horizontal take-off and landing (HTOL), is the usual process whereby fixed-wing aircraft perform takeoff and landing. As fixed-wing aircraft must have a forward motion to have relative air flow over the airfoils (wings) in order to generate lift, they require a period of ground acceleration before takeoff and conversely also a period of safe, gradual ground deceleration after landing, both translating to the necessity of sufficient distance for linear ground movement, which conventionally involve the use of dedicated runways.

During takeoff, the aircraft will first taxi or be tugged into a launch position at one end of the runway, where a final preflight check known as the run-up is completed. When cleared to proceed, the aircraft engines power up and the aircraft, propelled by the engines' thrust, begins accelerating down the runway in a takeoff roll with its landing gear wheels still contacting the ground. The takeoff roll ends when sufficient speed has been reached for the wings to generate more lift than the combined weight of the aircraft and its payloads, at which point the pilot manipulates the flight controls to pitch up the aircraft and raise the angle of attack of the wings, which further increases their lift coefficient and causes the aircraft to finally break contact with the ground (i.e. the liftoff) and transition into actual flight.