Aluminum-Brass-Nickel. The components used in the production of non-ringed engines. These engines use an aluminum piston, and a nickel plated brass sleeve. The engine is...

Occurs above the usual power-off stall speed when too much elevator control is input too quickly. This type of stall is usually far more violent than a wings-level, power...

ATV allows you to preset the maximum travel of a servo to either side from its neutral position. Such settings help tailor control action to suit your flying or driving s...

The tendency of an airplane to yaw in the opposite direction of the roll. For instance, when right aileron is applied, the airplane yaws to the left, thus opposing the tu...

The act of an aircraft hauling a glider aloft and releasing it.

(propeller) Is speculated to be a dominant mechanism causing rapid fatigue failure near a tip when insufficient or destabilizing tip stiffness exists. The interaction bet...

Towards the rear. Used such as: "...with an aft center of gravity....".

Adverse yaw, especially on flat-bottom wings, is caused by the difference in airflow density between the bottom and top of the wing. The airflow along the wing’s bottom i...

Hinged control surface located at the trailing edge of each wing, that provides control of the airplane about the roll axis. Ailerons move in opposite directions in order...

Twin elevator servos plugged into separate channels used to control elevator with the option to also have the 2 elevator servos act as ailerons in conjunction with the pr...

The shape of the wing when looking at its profile. Usually a raindrop type shape.

Exclusive software developed by Spektrum for air RC transmitters that includes all programming functions and features.

The Academy Of Model Aeronautics. The official national body for model aviation in the United States. AMA sanctions more than a thousand model competitions throughout the...

The angle that the wing penetrates the air. As the angle of attack increases so does lift and drag, up to a point.

Is the opposite of dihedral, having the wing tip centerline lower than the wing root centerline. Anhedral is generally used to aid in the instability of an aircraft to ma...

The TechOne ARF BUNDLE airplane requires intermediate level building skills. Some included components such as servos and motors do not come pre-installed and will need to...

Freewing offers some of its 90mm jets in "ARF Plus" format. Expanding on the normal ARF format above, The ARF Plus format has ALL components installed already, EXCEPT for...

A proprietary combination of gyros, sensors, and software that helps to stabilize and control the heading of RC aircraft models.

The wingspan divided by the chord. Aspect ratio is important where a wing's efficiency is concerned. A short aspect ratio (short wings) is better for maneuvering, si...

Adjustable Travel Volume. Used on many radio transmitters to limit, or extend, maximum throw of a servo. ATV can indicate having a single adjustment which affects both en...

All Up Weight - The total weight of the project. This includes everything needed to make it run or fly. Receiver, servos, batteries, etc. The all up weight of the project...

Any radio channel function other than the four basics (aileron, rudder, elevator and throttle).

A proprietary combination of gyros, sensors, and software that helps to stabilize and control the heading of surface RC models.

This type of roll is one where the aircraft’s fuselage remains exactly on the line of flight while the wings roll about it. Except for a very few jet fighters at high spe...

Term describing the amount of play between gears, or gear mesh. If too loose, the gear can slip, or strip the teeth. Too tight, and excessive wear is caused.

Connection using a ball, and a link which rotates on the ball. Used to connect the servo to a control surface or lever.

Extra weight added to a glider to help it penetrate better in windy weather or to increase its speed. Ballast is usually added in tubes in the inner portion of the wings...

This is a measure of how far from level flight a plane’s wings are set during a turn or maneuver. It is measured in degrees of angle from level flight.

Larger, built up ailerons rather than an aileron from a simple strip of solid wood like some kits have.

This refers to an aerobatic maneuver that involves the airplane following the twist of a large imaginary corkscrew (horizontal) through the air by way of rolling the airc...

These letters usually designate a ball-bearing supported crankshaft in an R/C engine or ball bearings in a better servo. This makes the engine run smoother and last longe...

A feature of some speed control units that permits both the motor and the receiver to be powered by the same battery.

Brake horsepower. A measurement standard used by manufacturers to help consumers compare engines. NOTE: BHP is measured at the maximum operating RPM of the engine, which...

A proprietary combination of gyros, sensors, and software that helps to stabilize and control the heading of RC aircraft models.

(Also called a T-Nut) A pronged nut that is pulled into a surface such as wood so that it cannot turn when a bolt is tightened into it. Blind nuts are typically used in s...

Bind N' Fly airplanes/quads/helis already come with a receiver so all that is required is for you to bind the receiver to your radio. It is important to make sure that t...

The thin layer of air immediately adjacent to a body moving through the air.

Brushless motors have almost completely replaced brushed motors in the RC industry. Their superior power and efficiency make them the obvious choice for powering your RC...

Training method utilizing two transmitter control boxes, linked together. The trainer radio has override control, which the instructor uses to take control when the train...

A vertical former inside a fuselage.

Also known as crow. A mix which activates up flaperons and down inner-most flaps for gliding speed control without spoilers or airbrakes. Crow (or butterfly) is only used...

A modern hobby adhesive that cures very quickly.

A strut attaching a wing to the fuselage when the wing is above the fuselage such as biplanes and parasol aircraft.

If you draw a line through the center of the airfoil that's exactly half-way between the top and bottom surface, you get the mean airfoil line. Depending upon the ai...

An aircraft having the horizontal stabilizer forward of the main wing rather than in the conventional position behind it. Canard aircraft are theoretically more efficient...

The part of the engine which controls the speed or throttle setting and lean/rich mixture via setting of the needle valve.

The balance point of a model airplane. For modeling purposes, this is usually considered the point at which the airplane balances fore to aft. This point is critical in r...

The location on the top of the wing where the sum of all lifting forces is located.

(propeller) are very predictable, given rotational speed and mass density distribution of a blade. Their contribution to total stress is relatively small.

Center of Gravity. Describes a central point in a given body, where all weight is considered to be concentrated. A central balance point.