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| DescriptionTrispastos scheme.svg |
Deutsch: Darstellung eines römischen Trispastos-Krans. Der Trispastos ("3-Rollen-Zug") stellte den einfachsten römischen Krantyp dar. Er bestand aus Hebebaum, einer Haspel, einem Seil und einem Flaschenzug mit drei Rollen. Dies entspricht einer Übersetzung von 3 zu 1. Ein einzelner Arbeiter an der Haspel konnte - unter der Annahme, dass 50 kg den maximalen Krafteinsatz darstellen, den ein Mann über einen längeren Zeitraum ausüben kann - Lasten von 150 kg heben (3 Rollen x 50 kg).
English: Scheme of an ancient Roman Trispastos crane ("Three-pulley-crane"). Being the simplest Roman crane, the Trispastos consisted of a single-beam jib, a winch, a rope, and a block containing three pulleys. Having thus a mechanical advantage of 3:1, a single man working the winch could raise loads of 150 kg (3 pulleys x 50 kg), assuming that 50 kg represent the maximum effort a man can exert over a longer time period.
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| Author | Eric Gaba (Sting - fr:Sting) | ||
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:36, 17 November 2010 | | 1,520 × 1,370 (117 KB) | Sting | Error correction |
| 23:17, 9 June 2008 |  | 1,520 × 1,370 (117 KB) | Sting | == Summary == {{Information |Description={{en|Scheme of an Antic Roman Trispastos crane.}} {{fr|Schéma d'une antique grue romaine du type ''trispastos''.}} |Source=Own work<br/> Based upon : Hans-Liudger Diene |
