Operation of an ultralight vehicle in certain airspaces requires authorization from ATC. VFR - Visual Flight Rules that govern the procedures for conducting flight under visual conditions. Latin Translation. ADF - Automatic Direction Finding via automated radio. ULTRALIGHT - An aeronautical vehicle, operated for sport or recreational purposes, that does not require FAA registration, an airworthiness certificate, or pilot certification. (2) The angle of a propeller or rotor blade in relation to its arc; also the distance advanced by a blade in one full rotation. Adiabatic Lapse Rate – The rate at which temperature changes due to increasing and decreasing altitude, under conditions of thermal equilibrium. LOOP ANTENNA - A circular radio antenna, either in the open or in a streamlined, teardrop housing, remotely turned 360° to fine-tune a station in league with other radio-directive devices. WING LOADING - The maximum take-off gross weight of an aircraft divided by its wing area. VD = Max Dive Speed (for certification only) COLLECTOR RING - A circular duct on a radial engine into which exhaust gases from its cylinders are safely discharged. FBO - Fixed-Base Operator. An American invention by Adams-Farwell Co (1896), it was first used for buses and trucks in the US (1903), then copied by French engineers for early aircraft engines (1914). Approach – The phase of flight when the pilot intends to land on the runway. The latter spelling is a trademark of the Autogiro Corporation. Accelerated Stall – A stall that occurs at a higher airspeed than a normal stall due to a higher load factor (g). Controlled airspace is also that airspace within which all aircraft operators are subject to certain pilot qualifications, operating rules, and equipment requirements in FAR Part 91. A panel instrument that gauges rate of climb or descent in feet-per-minute (fpm). GCA - Ground-Controlled Approach; part of ILS. Rated one to five, with the first figure for clearness and the second second for loudness. Latin: dirigo,to steer. CRAB - A rudder-controlled yawing motion to compensate for a crosswind in maintaining a desired flight path, as in a landing approach. TRSAs are depicted on VFR aeronautical charts. LTA - Lighter-than-air craft, generally referring to powered blimps and dirigibles, but often also includes free balloons. Also Rate Of Climb Indicator.

(2) The angle of a propeller or rotor blade in relation to its arc; also the distance advanced by a blade in one full rotation. Opposite of FLYING WIRES. Direction of travel is downward and outward from the fuselage. UNICOM - Universal Communication. Yaw – The movement of an aircraft, characterized by the nose moving side-to-side. Its characteristics are Center of Pressure (CP), DRAG (CD), LIFT (CL), Lift-Drag Ratio (L/D), and Moment (CM). A Glossary of AviationTerms and Abbreviations It affects a low-winged aircraft more than a mid- or high-winged aircraft because its wings are closer to the ground; aka GROUND CUSHION. ELEVON - A hinged device on the rear portion of an aircraft wing combining the functions of an elevator and an aileron.

HOW    ITEM    JIG    KING    LOVE    MIKE    NAN    OBOE MAGNUS EFFECT - The effect on a spinning cylinder or sphere moving through a fluid, in which force acts perpendicular to the direction of motion and to the direction of spin. United States 1-866-FLY-EPIC International 1-386-409-5583, Just Stop By! FEATHERING - In the event of engine failure, the process of adjusting a controllable-pitch propeller to a pitch position where the blade angle is about 90° to the plane of rotation in order to to stop its windmilling and lessen drag. An American invention by Adams-Farwell Co (1896), it was first used for buses and trucks in the US (1903), then copied by French engineers for early aircraft engines (1914). NACELLE - A streamlined enclosure or housing to protect something such as the crew, engine, or landing gear. COLLECTIVE PITCH - A cockpit control that changes the PITCH of a helicopter's rotor blades; used in climbing or descending. KNOT - One nautical mile, about 1.15 statute miles (6,080'); eg: 125kts = 143.9mph. Army Radar Approach Control (ARAC) (Army) DEADSTICK - Descending flight with engine and propeller stopped. (2) An airport surface paved with this substance, especially a runway or an APRON at a hangar. Use * for blank tiles (max 2) Advanced Search Advanced Search: Use * for blank spaces Advanced Search: Advanced Word Finder: See Also in English. Service provided at a TRSA is called Stage III Service. UNCONTROLLED AIRSPACE - Class G Airspace; airspace not designated as Class A, B, C, D or E. UNDERCARRIAGE - The landing gear of a land-based aircraft, including struts, frames, and wheels. Included are system components shared jointly with the military. ars longa, vita brevis: art is long, life is short: Seneca, De Brevitate Vitae, 1.1, translating a phrase of Hippocrates that is often used out of context. DEPARTURE STALL - A stall in the takeoff configuration with power. AIR ROUTE TRAFFIC CONTROL CENTER (ARTCC) or "CENTER" - A facility established to provide air traffic control service to aircraft operating on IFR flight plans within controlled airspace and principally during the en route phase of flight. French: monocoque, single shell. AIR ROUTE TRAFFIC CONTROL CENTER (ARTCC) or "CENTER" - A facility established to provide air traffic control service to aircraft operating on IFR flight plans within controlled airspace and principally during the en route phase of flight. Skid – The sliding and outward pivoting movement of the aircraft that occurs as a result of a shallow turn. Second in command (SIC) – The designated individual to take over flight operations from the PIC. Baseline – The minimum or starting point used for comparison. See also RADIO COMPASS, RADIO DIRECTION FINDER. VENTURI TUBE - A small, hourglass-shaped metal tube, usually set laterally on a fuselage in the slipstream to create suction for gyroscopic panel instruments.

Slip – The sliding and inward pivoting movement of the aircraft that occurs as a result of a steep turn. FERRY FLIGHT - A flight for the purpose of (1) returning an aircraft to base; (2) delivering an aircraft from one location to another; (3) moving an aircraft to and from a maintenance base. LAMINAR-FLOW AIRFOIL - A low-drag airfoil designed to maintain laminar (smooth, continuous) flow over a high percentage of the CHORD about itself. Also see MAGNETIC NORTH. See DIHEDRAL. Also in this class are Federal airways, airspace beginning at either 700' or 1,200' AGL used to transition to/from the terminal or enroute environment, enroute domestic, and offshore airspace areas designated below 18,000' MSL. AIR DEFENSE IDENTIFICATION ZONE (ADIZ) - The area of airspace over land or water, extending upward from the surface, within which the ready identification, the location, and the control of aircraft are required in the interest of national security. LOAD FACTOR (g) - The proportion between lift and weight commonly seen as g (sometimes capitalized)—a unit of force equal to the force of gravity times one. THRUST - The driving force of a propeller in the line of its shaft or the forward force produced in reaction to the gases expelled rearward from a jet or rocket engine. When the radio beacon is installed in conjuncion with the Instrument Landing System (ILS) marker, it is normally called a Compass Locator. While symmetrical for the logo of MGM, the better word order in Latin is "Ars artis gratia". Named for its inventor, British engineer Leslie George Frise. UPWASH - The slight, upward flow of air just prior to its reaching the leading edge of a rapidly moving airfoil. The term was borrowed from boat builders. FAR Part 105 - Parachute Jumping TOUCH-AND-GO - Landing practice in which an aircraft does not make a full stop after a landing, but proceeds immediately to another take-off. ICAO – International Civil Aviation Organization – A specialized agency of the United Nations. A “handshake” in aviation means something entirely different than what you might expect! YOKE - The control wheel of an aircraft, akin to a automobile steering wheel. ROLL - Of the three axes in flight, this specifies the action around a central point. LOOP ANTENNA - A circular radio antenna, either in the open or in a streamlined, teardrop housing, remotely turned 360° to fine-tune a station in league with other radio-directive devices. Radar Air Traffic Control Facility (RATCF) (Navy/FAA)

The purpose of such warning area is to warn non-participating pilots of the potential danger. PITCH - (1) Of the three axes in flight, this specifies the vertical action, the up-and-down movement. LORAN - Long Range Navigation system, which utilizes timing differences between multiple low-frequency transmissions to provide accurate latitude/longitude position information to within 50'. AIR TAXI - An aircraft operator who conducts operations for hire or compensation in accordance with FAR Part 135 in an aircraft with 30 or fewer passenger seats and a payload capacity of 7,500# or less. CONTROLLED AIRSPACE - An airspace of defined dimensions within which air traffic control service is provided to IFR flights and to VFR flights in accordance with the airspace classification. Named for physicist Heinrich Gustav Magnus (1802-70). IFR - Instrument Flight Rules, governing flight under instrument meteorological conditions.

FIVE-BY-FIVE (5x5) - In radio jargon, affirms that a radioed transmission was received as clear and loud. Compare DOWNWASH. ACCESSORY GROUP - Mechanical and electrical units mounted on an engine necessary for its operation, such as starter, magnetos, fuel pumps, etc. FLOATPLANE - A water-based aircraft with one or more mounted pontoons, as differentiated from a hulled SEAPLANE [Flying Boat], but often used generically. LIGHT SPORT AIRCRAFT - Special FAA certification class (LSA) for an aircraft other than a helicopter or powered-lift—single-engine aircraft, airship, balloon, GLIDER, GYROCOPTER, ROTORCRAFT, weight-shift-control aircraft.