A Cavity pump is a type of star pump that leaves a small cavity on one end. This is achieved by a small extrusion at the end of the star pump that creates a cavity when composition is pressed. This type of star can be used for multiple types of effects. One way to use it is a changing effect. Press and prime only the flat end of your main composition. When dry, fill the cavity with another effect. As the main composition burns down, the second effect is started.
A Catherine wheel is a special type of wheel which consists of a spiral of pyrotechnic material which produces thrust as it burns causing the wheel to spin and also produces a spiral of sparks. The Catherine wheel is mounted at the center against a fence post or other solid object.
As the Catherine wheel burns it's casing is also consumed, similar to a lance. This is different from a wheel created with drivers where the case of the driver is not consumed.
A cake firework, also known as a candle barrage is a firework comprising a series of roman candles or single shot tubes connected together. Typically, the internal fusing is set to fire each tube in series, or to fire several tubes at the same time, or a combination of these.
"CPSC" or Consumer Product Safety Commission is charged with protecting the public from unreasonable risks of serious injury or death from more than 15,000 types of consumer products under the agency's jurisdiction. One of which is consumer fireworks or 1.4G classified.
CATO is a failure of a rocket, generally explosive, where all the propellant is burned in a much shorter time than planned. This can be a nozzle blow-out (loud, but basically harmless), an end-cap blow-out (where all of the pyrotechnic force blows forward, expelling and igniting the payload, if any) or a casing rupture (which has unpredictable, but usually devastating, effects).
A burr mill, a type of crusher having a revolving and a stationary abrasive surfaces, separated by a distance usually set by the user. The device includes a revolving screw that pushes the material past the abrasive surfaces. Both electrically and manually powered models exists.
Brocade is the name of a large gold chrysanthemum with characteristic stars that droop before they burn out. Brocade shells differ from willow shells in that they have a large and symmetrical burst. Brocade stars are often based on charcoal streamer type stars with added metals, for example ferrotitanium
A break charge, also known as a burst charge, is a small explosive charge inside an aerial shell that ignites explosively at the proper height, almost instantly producing a large volume of fiery gasses which ignites and spreads the contents of the shell.
Typical break charges (in approximate order from most to least powerful) are made from:
A Bottom shot describes the last break in a multi-break shell, the last break being a salute.
Video showing bottom shot:
