viernes, 18 de marzo de 2011

Medieval ballista / Ballesta de torno

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The Ballista was an invaluable Medieval siege attack, and indeed defence, weapon which was similar to a crossbow and worked by using tension. The Ballista was used for aiming huge wooden, iron clad, darts or arrows powered by twisted skeins of rope, hair, or sinew - a huge dart-throwing machine. The Ballista loosed heavy bolts, darts and spears along a flat trajectory. The force of the missiles launched from the Ballista had great penetration and were capable of skewering several of the enemy at one time! The word 'Ballista' is derived from the Greek word 'Ballistes' meaning to throw.


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domingo, 6 de marzo de 2011

THE BIZANTINE ALTAR OF SACRIFICE

Philon from Bizantium used Straton´s principle that consists of heating air to provoke dilation and make work ancient neumatic machines.



This Bizantine inventor by orders from priests built an authomatic sacrifice altar, it was necessary to be hollow and joined through a short metal hose with a subterranean water deposit. Once ignited the fire of sacrifice, the air inside the boiler ubicated under the bonfire increased the air pressure on the water deposit as a result obtaining the wine destinated for sacrifice rises through the metal hose and emating from the hand of the priest extinguishing the fire, it was a signal that Gods accepted the offering and were satisfied.




Filon de Bizancio aplico el descubrimiento de Estratoón de la dilatación del aire por el calor para fabricar el altar del sacrificio.

EL ALTAR DEL SACRIFICIO BIZANTINO

En este caso, el altar del sacrificio, que necesaria mente tenia que ser hueco, estaba tambien unido por medio de un corto tubo con un depósito subterraneo de vino. Una vez encendido el fuego del sacrificio, al dilatarde el aire en la cámara hueca situada bajo el altar, aumentaba la presión ejercida sobre el depósito, con lo cual se conseguia que el vino destinado a los sacrificios ascendiese por un tubo, y que, después de atravesar la figura del sacerdote emanara vino de la mano de éste apagando el fuego como señal de que los dioses estaban satisfechos de la ofrenda.




My birthplace Guanajuto Mexico

Warwick castle England. All pics by Gary Hodgkinson

Royal Museum, Belgium. All pics by Everaert