L
Lateral—From side to side; that is, crossing the length fore-and-aft, and generally at right angles to it.
Land-speed—The speed of aircraft as related to objects on the ground. See [Air-speed].
Landing Area—A piece of land specially prepared for the alighting of aeroplanes without risk of injury.
Leeway—Movement of a machine aside from the intended course, due to the lateral drift of the whole body of air; measured usually at right angles to the course.
Lift—The raising, or sustaining effect of an aeroplane surface. It is expressed in the weight thus overcome.
Lighter-than-air—A term used to designate aircraft which, owing to the buoyancy of the gas attached, weigh less than the volume of air which they displace.
Longitudinal—In a lengthwise, or fore-and-aft direction.