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Here is the beginnings of our RC English page. Because there are always new developments and advances coming up in this fast-growing industry, expect changes and additions very often! This is just the beginning.

A-Arms We got picture!
The lower suspension arm in the suspension system. Named for its resemblance to the letter A.
The lower arm of a suspension assembly.

Anti-Locking Brake System. Some of the higher end radios have this feature.

Alternating Current. Electrical current alternates directions at intervals measured by hertz. This is a direct product of the mechanical nature of the genarators that produce the energy in the first place.

Acceleration is the rate at which the vechiles pulls off from a stand still.
When a vehicle's speed is increasing, it's accelerating.

When the car turns to the right or left, the inner wheel steers at a greater angle than the outer whheel to compensate for arc each respective wheel must trave; in order for the vehicle to make a clean turn.
The degree of difference in the steering angle between the inside andoutside wheel when a vehicle is turning.

Air/Fuel Mixture
The mixture or ratio of air to fuel that enters a nitro engine through the carburetor.

Allen Driver We got picture!
A six sided tool used for car maintenance and construction.

Short for ampere. A unit of electric current.

Antenna We got picture!
The portion of a transmitter or receiver that emits or receives radio waves.

The entire internal component to a conventional electric motor.

A standard of measure to measure wire thickness.
Ball end We got picture!
A small metal object that has a ball at the end of a screw

Ball cup We got picture!
The plastic end of a turnbuckle that connects to a metal ball end.

Bearing We got picture!
A number of small steel balls that provide for lower friction and smooth running.

Belt drive We got picture!
A term used to describe a drive system that uses a belt to transfer power.

Body We got picture!
The cover of a R/C car.

Body clips We got picture!
The small clips used to secure a body to a vehicle.

Bottom end
A vehicle's acceleration rate from a dead stop.

Bottom out
When a vehicle is driving and the chassis hits the road surface.

An upright partition on a vehicle that allows for increased rigidity and serves amounting point for additional components.

The process of using an engine or motor for the first time

The portion of an electric motor through which current flows and comes in contact with the motor's commutator.

Bushing We got picture!
A small plastic or brass spacer that supports a shaft though its inside diameter and allows the shaft to spin.

CA We got picture!
(Cyanoacrylate) Quick dry glue used for a number of things includingmounting rubber ties to rims.

The angle, from the rear or front, of the wheels.

Camber gauge We got picture!
Made by companies like RPM, Racetech, and others. A camber gauge is used to measure a wheels camber angle.

Capacitor We got picture!
A small electrical component used as a filter to reduce radio noise generated by an electric motor.

Carburetor We got picture!
A component on a combustion engine that regulates the mixture of fuel and air and ultimately regulates the engine's speed.

The angle, from vertical, of the kingpin in relation to the ground.

The imaginary vertical line that runs down the center of a car.

(Center of Gravity) The point on the chassis at which the vehicle balances with all components installed.

Chassis We got picture!
The main platform that a car or truck is built upon.

Clutch bell We got picture!
A metal housing with a gear attached.

Combustion Engine
An engine that uses combustible fuel to create mechanical energy.

The portion of a motor armature that carriers current through to the rest of the armature.

Compound We got picture!
The type of rubber that a tire is made of.

The pressure that builds in a glow engine as the piston moves through its up-stroke.

Connecting Rod We got picture!
The rod that connects the piston to the crankshaft in a glow engine.

Counter steer
When a driver must turn a cars front wheels in a opposite direction to counter a vehicles tendency to spin out.

A flathead screw with a tapered head.

Crankcase We got picture!
The main body of an IC engine.

Crystals We got picture!
Crystals are cut to resonate at an exact frequency so that the transmitter and receiver operate on the same frequency.

The resistance caused by fluid in a shock body when the piston moves through it.

Direct Current.

A term used to indicate that something is setup perfectly.

Diff Balls We got picture!
In a ball differential, the balls float within the diff gear and cause the opposite side to rotate in the opposite direction when the diff gear is held and one out drive turned.

The part of the drive train which allows powered wheels (front and rear) to rotate at different speeds.

Disk brake We got picture!
A disk surrounded by a caliper.

Dogbone We got picture!
A rive shaft used to transfer power from one outdrive to another.

Donuts We got picture!
Foam tires used in on-road racing.

Drive shaft We got picture!
Any shaft that rotates to drive a vehicles wheels.

Also known as a "Dyno." A dynamometer is a measuring instrument used to measure the amount of mechanical force a motor or engine exhibits.

E-clip We got picture!
The small retaining clip shaped like a "E" that often times holds hinge pins in place.

The molded end of an electric motor that houses the motor brushes, springs and allows for timing adjustments.

Epoxy We got picture!
A two part glue that uses a catalyst to harden and is often times very, very strong.

ESC We got picture!
(Electronic Speed Control): An electronic device used to regulate power between a vehicles battery and electric motor.

Exhaust manifold We got picture!
The pieces that route engine exhaust from the engine to the exhaust pipe.

A feature found on some radios, receivers, and servos that returns the servo to a set point should any fail-safe component experience interference.

Filter We got picture!
An item that is used to filter debris from air or fuel.

Describes the final or last adjustments so that something is to the users final liking.

Flywheel We got picture!
A large metal wheel mounted to the output shaft of a nitro engine.

(Frequency Modulation): a method of transmitting radio signals that adjust the frequency of a wave length.

Four-wheel drive
A vehicle that extends driving force from all four wheels.

Fuel We got picture!
The ingredients that is ignited in a combustion engine.

Fuel tank We got picture!
The sealed tank inside of a vehicle that holds fuel during use.

Fuel tubing We got picture!
The silicone based hollow tubing that allows fuel to travel from the fuel tank to the engine.

A standard of measure used to determine the thickness of electrical wires.

Gear box We got picture!
Orr Transmission. The box that houses the differential or gears of a vehicle.

Gear Cover We got picture!
A shield that keeps dirt, debris, and fingers from disturbing two or more spinning gears.

A type of battery typically used to supply power to starter box for a gas engine.

Glow plug We got picture!
A plug that uses a thin coiled filament to ignite and maintain a running combustion engines.

Graphite We got picture!
A stiff, lightweight, space age composite material commonly used for chassis, suspension arms, shock towers, and other parts of a vehicle's chassis.

Ground clearance
The space between the bottom of a vehicle's chassis and the road surface when the vehicle's suspension arms are fully extended.

Articles made of metal used to assemble a vehicle.

A term used to describe soldering ESC wires directly to a battery back rather then using conventional plugs.

To speed up or go faster.

Heat gun
Like a blow dryer, a heat gun is used to shrink heat shrink and dry paint or glue.

Heat sink We got picture!
Made of a heat conductive material, a heat sink is used to dissipate heat over an increased surface area.

Hinge pin
A metal pin that acts as a hinge connecting two separate pieces.

A term used to describe the initial lead at the start of a race.

Either an aftermarket piece or the act of actually replacing original car components with aftermarket replacements with the intention of improving performance or looks.

Technically a unit of measure to indicate power in terms of watts over distance.
Idler gear
A gear between two others that simply transferrers mechanical energy and does not reduce or increase rotations or tongue.

When an engine is running, but the car does not move
Jumper Wire
A piece of wire or other conductive metal apparatus used to make a connection between two electrical points. Commonly used in radio gear and ESC's.
A lightweight material that is as strong as steel, yet much lighter and flexible.

The angle of the entire front suspension of a car, from horizontal, in the relationship to the rest of the chassis.

The pin in the steering assembly on which the steering spindles rotate.

A term used to describe a "pinched" condition in a flexible tube or hose. Fuel line can become "kinked" if bent too sharply around a corner allowing the tubing to collapse and fold, thus blocking the flow of fuel at the kinked area.
Lexan We got picture!
The clear polycarbonate material used to produce R/C car bodies.

A nut that contains material (usually plastic) to make it self locking.

A substance, often a fluid, that's used to reduce friction.
Motor We got picture!
An electromechanical device used to supply the power needed to move a vehicle.

Needle valve
A valve located on a carburetor that allows for finite adjustments.

(Nickel Cadmium): A material used in rechargeable batteries. Ni-CD batteries build memory.

A material used in rechargeable batteries do not build memory.

Short for Nitromethane. Nitro is also a term used to describe any thing R/C related that runs on fuel containing Nitromethane.

Usually describing a wheel. An offset wheel has a mounting point that is more towards the center of the wheels width.

A unit of measure to indicate electrical resistance.

Can be used as a lubricant or a damping fluid.

Term used to indicate that a shock contains oil as its method of damping.

Typically a rubber or silicone ring that acts as a gasket. Can be found inside shock bodies and on more expensive nitro engines. 

Pinion gear
A small gear that attaches to an electric motor and counters the spur gear.

The metal cylinder within an engine that is compressed when combustion occurs.

The number of teeth per inch on a gear. The higher the number the smaller the teeth.

Refers to the action of a servo as directed by the receiver. A non-proportional action means to move from one extreme to the other with no controllable measure (all on or all off) Proportional means to have varying control of the servos action. ie ability to move in small increments. Most commonly applicable to steering function.

Pull-start We got picture!
On a nitro engine. A pull-start replaces a starter box and allows an engine to be started by tugging on the pull-start while the glow igniter is attached.

Term used to describe the amount of acceleration a vehicle possess.


Radio We got picture!
The handheld device you hold to control your RC Car from a distance.

Radio Controlled.

A battery that can be charged and charged again after use.

The resistance of electrical flow through a circuit or connection.

An apparatus possessing resistance to electrical current.

Radio Frequency.

To increase fuel to air ratio on a gas engine.

A non-profit organization established to set guidelines and rules for sanctioned racing in the United States and Canada.

(Revolution Per Minute) Just that. The number of times an object completely rotates (360 degrees) in one minute.

Servo We got picture!
A small device, used for steering, that rotates proportionately to the input from the transmitter.

On a radio, the control switch that reverses servo throw.

A small device that uses a spring to absorb sudden shock or impact coming form the servo linage.

Shocks We got picture!
Damping devices that support the chassis and allow vehicles to hold the road and remain in control over difficult terrain.

Shock bodies
The body of a shock that contains oil or some other method of damping.

Shock Oil We got picture!
The damping that fluid that provides damping resistance inside.

Shock Tower
The sprung piece on a chassis to which shock absorbers mount.

A rubbery glue used to mount electronic pieces and repair items like bodies.

Silicon We got picture!
In R/C, a type of oil based used as a lubricant or as a suspension damping fluid.

Spoiler We got picture!
Often referred to as a wing, a spoiler disturbs tat air flowing over the body to create down-force on the car.

Spur gear
The entry gear on a transmission, counters the pinion gear.

Sway bar
The entry gear on a transmission, counters the pinion gear.


A fastener that makes a small moose to fasten items together.

Thread-lock We got picture!
A compound used to increase resistance in a screw/nut connection.

Threaded Shock Bodies
Shock bodies on the shocks that let you adjust how much down travel or hardness the shocks have by turning external adjusters.

A condition when the front edge of both tires are closer together than the rear edge of both tires.

A condition when the front edge of both tires are farther apart then the rear edge of both tires.

A term used to describe rotational force.

A series of gears or cogs that are intended to reduce RPM to increase torque.

A low rate charge, usually below 0.5 amp.

An adjustable rods that when in conjunction with ball caps, can be lengthened or shortened easily.

Turn Marshal
At a race, the person responsible for righting a car that has crashed or turned over.

Tuned pipe We got picture!
An exhaust pipe that is specifically designed for maximum performance when mounted on a particular type of engine.

A term used to describe a tire's friction with the road surface.

A condition in which more pressure is applied to one side of the chassis.

Indicated a transmitter.



Refers to a condition where air is absent or attempting to be drawn inward. Carberators on a nitro engine use a vacum to drawn fuel from the fuel tank.
[Courtesy of Matthew Autenrieb Oct 26, 2001]

An electrical unit of measure describing electrical potential.


The few minutes before the start of a race devoted to allowing the cars' engines to come up to operating temperature.

An electrical unit of measure that takes into account voltage and amperage.

The distance between the front axles of a car and the rear axles of the distance between both rear and front axles.

An evenly rutted section of the track

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