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Dragster Glossary

Aerodynamics

The properties and forces produced as an object moves through the air or a stream of air moves around an object.

Aesthetic

Describing an object's visual appeal or attractiveness.

Band Saw

A bench-mounted or freestanding power tool used to make precise, curved cuts that is ideal for rough shaping CO2 car bodies.

Bracket

A method of organizing competitions and determining race pairings. Bracket design varies with the number of competitors and the number of losses required to eliminate a competitor from the competition. Click here to find links to find sample brackets.

Christmas Tree

An assembly of lights oriented in two vertical columns. Used near the starting line of drag racing and CO2 racing to signal the start of the race.

CNC Mill

A computer-interfaced machine used for shaping processes. Sequences of cutting tool movements are controlled by a variable computer program. CNC stands for "computer numerical control."

CO2 Cartridge

A small, sealed, metal tube that contains compressed carbon dioxide. CO2 cartridges are used to propel race cars down the track.

Confined

Restricted to a limited space; carbon dioxide is confined in a sealed cartridge.

Coping Saw

A small hand-held saw with a narrow blade, useful for making curved cuts in wood. Good for rough shaping race car bodies if a band saw is unavailable.

Decelerate

The act of slowing a moving object. In CO2 racing, a car must be safely decelerated after it crosses the finish line.

Drag

Force that resists an object's movement through the air. The more the object disrupts the laminar flow of air around it, the more drag is developed.

Dragster

A race car that races a short distance on a straight track. CO2 race cars are often referred to as dragsters.

Drill Press

A bench-mounted or freestanding power tool used for drilling precise holes. Particularly useful for drilling properly aligned axle holes in the car body.

Eddie

Turbulent flow of air that moves in a random tumbling, or circular, pattern.

Elevated Track

A freestanding racetrack surface that is roughly the same height as a tabletop. Spectator viewing is greatly enhanced with an elevated track. Pitsco's FasTrak is a fine example.

Finish Gate

Race system component that is located on the finish line of the racetrack. As the two cars speed through the gate, individual sensors detect their presence, stopping the system's electronic timers.

Firing Pin

Part of launch pod assembly with sharp pointed end that punctures a hole in cars' CO2 cartridges to start a race. Made of hardened steel.

Flow Visualization

A feature of some wind tunnels that involves the introduction of a visible vapor into the moving airstream. This enables racers to see how their car performs in an airstream. Drag-inducing body features can be easily identified.

Friction

Force that resists relative motion between two objects in contact.

Go/No Go Gauge

A custom measuring tool that can be held up to a part of a dragster to determine whether the part meets the specified measurement requirements.

Graphite

In powder form, a dry substance that works well for lubricating race car wheels and axles. Available from Pitsco in small bottles.

Head-to-Head Launching

A method of racing where two competitors manually launch their cars. The competitors' reaction times are an important factor in the race. The Impulse G3 Race System features an optional head-to-head (H2H) mode.

Hot-Wire Foam Cutter

A device for cutting polystyrene that employs a thin, electrically heated wire that melts the foam.

Hybrid Car

A CO2 racecar design in which two wheels are housed inside the body and two are mounted externally.

Inertia

Property or tendency of an object at rest to remain at rest unless acted upon by a force.

Laminar Flow

A straight, layered flow of air that is free of turbulent motion.

Launch Pods

Devices that start a race by puncturing the cars' onboard CO2 cartridges. Each car, with its nose on the starting line, is fitted to a launch pod before racing. An electronic signal from the race system triggers the two launch pods at the same instant.

Lift

Aerodynamic force that pushes upward on a body as it moves through an airstream. Airplane wings generate lift; race car bodies might also generate lift, positive or negative (downward force), as they move down the track.

Monofilament Line

A single strand line used to prevent speeding CO2 cars from soaring off the track. The line is threaded through two screw eyes mounted to the underside of a car body, and then it is stretched tight and anchored on extreme ends of the track.

Polystyrene

A solid, expanded plastic foam material that is soft and lightweight. Commonly referred to by the trademarked name Styrofoam™.

Power Plant

The CO2 cartridge on board a race car. The power plant housing is the body material that surrounds the cartridge.

Pressure

A measurement of force per unit of area. In a sealed CO2 cartridge, pressurized carbon dioxide gas exerts an equal force in all directions to the inner surfaces of the cartridge.

Production

A phase in the design process in which the final version of a product is manufactured. Production follows the design, prototyping, and testing phases.

Prototype

A one-of-a-kind, preproduction version of a product. Used to test for design flaws so they can be corrected before the product is mass produced.

Rail Car

A CO2 race car design in a narrow rail connects the front axle to the back of the car and has wheels mounted on the outside of the car body.

Rotary Multi-Tool

A high-speed hobby power tool that works well for intricate shaping, cutting, drilling, sanding, and polishing. A variety of bits give rotary tools excellent versatility. Often referred to as a Dremel™, which is a popular brand name.

Screw Eyes

Small screws with an enclosed ring on one end. Two screw eyes are mounted on the bottom of CO2 race cars to accommodate the racetrack's monofilament guideline.

Shell Car

A CO2 race car design in which all four wheels are housed inside the body of the car.

Specifications

Set of very specific requirements for a project or competition, often including a set of measurements.

Staging Area

The area of the racetrack before the starting line, on the extreme end. Pairs of cars are placed in this area (after they are threaded onto the monofilament guideline) to await their turn to race. The staging of cars saves time during a racing competition.

Starting Alignment

Refers to the relative positioning of a pair of cars just before they race. Nose, or nose-to-nose, alignment is achieved when the extreme forward points of both cars are aligned with the starting line.

Stationary

Not moving, sitting still.

Symmetry

To have balance, or to have the same shape or size on opposite sides.

Thrust

Force that propels an object, sets it into motion, or keeps it moving.

Thumbnail Sketch

A small, quick sketch used to rapidly communicate ideas.

Tolerance

An acceptable variance from a specified measurement. Used to determine the minimum and maximum measurements.

Traction

Friction between a car's tires and the road surface. Traction allows the wheels/tires to propel a car forward without the wheels spinning in place. In CO2 racing, the wheels do not propel the vehicle, so increasing traction is not necessary.

Turbulence

Property of an airstream moving in a swirling or tumbling fashion; see also Eddies

Volume

The amount of physical space occupied by an object or substance.

Wedge Car

A race car with external wheels that has a triangular wedge body shape.