A fast battery charger designed to work from a 12-volt power source, such as a car battery.

A loop that is terminated by a dive into the ground. This maneuver is entertaining for all pilots present except the one who performs the maneuver.

Hinged control surface located at the trailing edge of the wing inboard of the ailerons. The flaps are lowered to produce more aerodynamic lift from the wing, allowing a...

A gradual increase in pitch angle to bleed off excess airspeed just before landing.

A special box used to hold and transport all equipment used at the flying field.

Flight Log is in reference to a screen that reports the signal and reception quality between your Spektrum Transmitter and telemetry capable receiver. This is reported to...

A function of your transmitter to change flight characteristics with the flip of a switch. This can be customized to control many aspects of flight, such as rates, contro...

All of the radio equipment installed in the airplane, i.e., Receiver, Servos, Battery, Switch Harness.

A phenomenon whereby the elevator or aileron control surface begins to oscillate violently in flight. This can sometimes cause the surface to break away from the aircraft...

Frequency Modulation. This describes the mode of transmission of radio signal from transmitter to receiver.

Spektrum technology that allows the configuration of Smart devices (receivers, etc.) wirelessly and directly from the transmitter. No separate computer or mobile device i...

Although a 4-stroke engine has less power than a 2-stroke engine of comparable size, there are advantages to 4-stroke engines. They do not require a muffler and are often...

The simultaneous loss of information to both antennas in the aircraft system.

The time interval at which the servo data is updated on the receiver.

The specific channel or Radio Frequency spectrum that a radio broadcast on. In a traditional RC radio, the transmission crystal resonates when voltage is applied; the rat...

The FCC has allowed the 72MHz band to be used for R/C aircraft operations. This band is divided up into many different channels in which you can choose a radio system. Yo...

A frequency module plugs into the transmitter and enables you to change the channel number your radio broadcasts on.

The main body of the airplane.

Typically referred to in gyros, gain is the feedback correction authority used to counteract the rate of motions in a gyro.

Momentary radio problem that never happens unless you are over trees or a swamp ;)

A very smooth, gentle landing without a hint of a bounce.

The cushion of air that the model rides on when close to the ground. This will decrease the amount of elevator needed to maintain a constant altitude when near the ground...

Globally Unique Identification Code. Each individual module or radio is factory programmed with its own unique serial code. In the binding process, the receiver is progra...

Model pulls up and executes five-eighths (5/8) inside loop to 45 degrees, hesitates, does one-half (1/2) roll, hesitates, then performs one-eight (1/8) inside loop back t...

Model pulls up and executes one-eighth (1/8) inside loop to 45 degrees, hesitates, does one-half (1/2) roll, hesitates, then performs five-eights (5/8) inside loop back t...

Model executes one-quarter (1/4) loop to a vertical track, performs a stall turn through 180 degrees, then recovers with another one-quarter (1/4) loop to level flight in...

A skin condition suffered by your aircraft when it is not taxiing, flying or landing. I.E. when you are transporting it to the flying field, or working on it on your benc...

In gyros, used to maintain the indented heading or direction of the aircraft or vehicle despite outside influences, wind, round surfaces, etc.

Sudden radio interference which causes your model to fly in an erratic manner. Most often caused by someone turning on a radio that is on your frequency, but can be cause...

In Spektrum systems, a hold occurs when 45 consecutive Frame losses occur. At this point the system enters failsafe.

The flight surface that supports the elevator and also helps to stabilize the model in pitch.

An engine which has been running will tend to remain hot for a short time. During this period, it is possible to restart the engine by turning the crankshaft without the...

A maneuver originally used to reverse direction in combat. The airplane noses up and over onto its back. It then rolls upright and continues in the direction opposite to...

Angle of the airfoil's centerline to the longitudinal axis of the aircraft. Positive incidence indicates that the center of the leading edge is higher than the cente...

Used to measure the angle of attack of an airfoil.

A Kit describes an unassembled model, arrives as packages of parts which must be assembled, as opposed to an ARF, or Almost Ready to Fly, which is mostly pre-assembled or...

Model rolls 90 degrees at a uniform rate. The center of gravity is held at a constant altitude during the entire maneuver using rudder for altitude and elevator for rudde...

The Kv number’s useful because it let’s you figure out how many volts you need to achieve a certain RPM, or vice versa. For an example, a 980 Kv motor powered by an 11....

Laminar Flow is the smooth, uninterrupted flow of air over the contour of the wings, fuselage, or other parts of an aircraft in flight. Laminar flow is most often found a...

The landing maneuver will start two (2) meters from the ground. The model flares smoothly to a nose-high attitude, dissipating flying speed, then smoothly touches the gro...

The time it takes for a servo or ESC to react to an input made on a radio.

The left-right or side-to-side balance of an airplane. An airplane that is laterally balanced will track better through loops and other maneuvers.

The foremost edge of an airfoil or propeller, first part of the wing or propeller to go through the air.

The aerodynamic force generated by air flowing around an airfoil that is equal to or greater than the weight of the aircraft and acts opposite to the force of gravity.

A load-bearing, fore-to-aft structural member of a fuselage.

A measure of a battery's total capacity. The higher the number (e.g., 600 mAh, 1,500 mAh) the more charge a battery can hold and usually, the longer a battery will l...

Megahertz. One hertz represents one cycle per second, and a megahertz is 1,000,000 hertz.

Two radio control channels can be coupled together so that they move together when only one control channel is activated. Many 1/4 scale models require a combination of a...

Internal memory or capacity available in the transmitters to store different aircraft settings and parameters.

A safety feature that prevents a pilot from flying a model when the model selected in the radio is not correct.