The Ancient EngineersBallantine Books, 1974 - 450 páginas Traces the advancement of early invention and technology from the first recorded engineering project of early Egypt. |
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Página 123
... sails faster if the sail is hoisted higher ; he thinks it has to do with the lev- erage of the mast against the hull , whereas the real reason is that winds usually blow faster higher up . This however brings him to another pregnant ...
... sails faster if the sail is hoisted higher ; he thinks it has to do with the lev- erage of the mast against the hull , whereas the real reason is that winds usually blow faster higher up . This however brings him to another pregnant ...
Página 124
... sailing ships had the simplest pos- sible rig : one square sail . With such a sail one can sometimes sail into the wind , but less than a point ( 114 ° less than a right angle ) and then only if the ship is handy , with a deep keel ( to ...
... sailing ships had the simplest pos- sible rig : one square sail . With such a sail one can sometimes sail into the wind , but less than a point ( 114 ° less than a right angle ) and then only if the ship is handy , with a deep keel ( to ...
Página 224
... sail appeared , making it possible to sail much closer to the wind than before . When a fisherman named Alexandros of Miletos died near Athens , a tombstone was put up showing Alex- andros steering his fishing smack Alexandros ' sail is ...
... sail appeared , making it possible to sail much closer to the wind than before . When a fisherman named Alexandros of Miletos died near Athens , a tombstone was put up showing Alex- andros steering his fishing smack Alexandros ' sail is ...
Contenido
One The Coming of the Engineers | 1 |
Two The Egyptian Engineers | 18 |
Three The Mesopotamian Engineers | 46 |
Derechos de autor | |
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Términos y frases comunes
Agrippa Alexandria ancient aqueducts Arabs arch Archimedes architect Aristotle armor army Assyrian Athens Babylon became began brick bridge bronze builders building built Byzantine called canal castle catapults centuries China Chinese civilization classical columns Demetrios dome early Egypt Egyptian emperor Empire engineering Europe feet fire Frontinus galleys gear Greek Hadrian Hellenistic Hence Herodotos Heron Heron of Alexandria High Middle Ages horse houses Imhotep India invention iron kings Ktesibios Lake land later Leonardo machine mechanical medieval Mediterranean Mesopotamia Mesopotamian Middle Ages miles mill modern Mongols Muslim Nemi ships oars palaces Persian Philon Philon of Byzantium Phoenicians piers pipes probably Ptolemaios pyramid Renaissance river roads Roman Rome roof rowers sail Sennacherib shaft ships side siege statue stone structure temple took tower Trajan treadwheel tunnel turned vault Vitruvius wall water clock water wheel wooden