Rip panel: A strip in the upper part of a balloon which is torn off when immediate deflation is desired.
Roll, A: An aerial maneuver in which a complete revolution about the longitudinal axis is made, the direction of flight being maintained.
Rudder: A hinged or pivoted surface, usually more or less flat or stream lined, used for the purpose of controlling the attitude of an aircraft about its normal axis—i. e., for controlling its lateral movement.
Balanced.—A rudder having part of its surface in front of its pivot.
Rudder bar: The foot bar by means of which the rudder is operated.
Seaplane: A particular form of airplane in which the landing gear is suited to operation from the water.
(a) Boat seaplane (or flying boat).—A form of seaplane having for its central portion a boat which provides flotation. It is often provided with auxiliary floats or pontoons.
(b) Float seaplane.—A form of seaplane in which the landing gear consists of one or more floats or pontoons.
Serpent: A short, heavy guide rope.
Side slipping: Sliding downward and inward when making a turn; due to excessive banking. It is the opposite of skidding.