Construction
The surfaces are typically composed of thick, strong PVC or vinyl and nylon, and the castle is inflated using an electric or petrol-powered blower. The principle is one of constant leakage, meaning small punctures are not a problem - a medium-size "bouncy castle" requires a fan with a mechanical output of about two horsepower (consuming around 2 kW electrical power, allowing for the efficiency of the motor).
UK and Australian bouncy castles have specifications calling for fully inflated walls on three sides with an open front and foam "crash mats" to catch children who may jump or fall out of the structure.
Modern moonwalks in the US are typically supported by inflatable columns and enclosed with netting. The netting allows for supervision as adults can see in from all sides.
Cheaper inflatable structures are usually made of polyester rather than nylon PVC and do not use a blower, instead they are inflated with a pump similar to an airbed. They do not last as long and it is illegal in the UK and USA to hire these out.
Another type of home-use inflatable has evolved, with a blower pumping in air continuously. Pores in the seams and material allow air to escape as kids play, while the blower continues to inflate the unit. This category has emerged as a response to parents who wish to buy an inflatable for home use.
Read more about this topic: Inflatable Castle
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