Firework display (competition) Gozo, Malta 05

The Catherine wheel or pinwheel is a type of

firework Fireworks are a class of low explosive pyrotechnic devices used for aesthetic and entertainment purposes. They are most commonly used in fireworks displays (also called a fireworks show or pyrotechnics), combining a large number of devices in ...

consisting either of a powder-filled spiral tube, or an angled

rocket A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entir ...

mounted with a pin through its center. When ignited, the energy of the fireworks not only create sparks and flame, but cause the wheel to quickly rotate, making the display much more spectacular. The physics of the process are those of an

aeolipile An aeolipile, aeolipyle, or eolipile, from the Greek "αιολουπυλη", also known as a Hero's engine, is a simple, bladeless radial steam turbine which spins when the central water container is heated. Torque is produced by steam jets ex ...

. The

is named after

Saint Catherine of Alexandria Catherine of Alexandria (also spelled Katherine); grc-gre, ἡ Ἁγία Αἰκατερίνη ἡ Μεγαλομάρτυς ; ar, سانت كاترين; la, Catharina Alexandrina). is, according to tradition, a Christian saint and virgin, wh ...

who, according to Christian tradition, was condemned to death by “ breaking on the wheel”. When she touched the wheel it miraculously fell to pieces. The largest Catherine wheel ever made was designed by the Lily Fireworks Factory of Mqabba,

Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

. The Catherine wheel had a diameter of , and was lit on 18 June 2011, the eve of the annual feast of ''Our Lady of the Lilies''. In Malta, Catherine wheels are a traditional fixture during every village 'festa'. Some villages even hold competitions on the eve of the parish feast, while others display the vast work of one firework. Entrants display a variety of moving shapes and include various colours year after year as the technology progresses. These displays are only a small part of the firework catalogue planned throughout the week preceding the feast and on the feast day itself. The Catherine wheel displays typically end with the burning of what is called 'the carpet': the largest Catherine wheel in the display on the night. In the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

, Catherine wheel is also known as trompillo and according to Republic Act 7183, it is a legal firework.

References

Types of fireworks {{Pyrotechnics-stub