File:Trispastos scheme.svg
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Summary
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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 12 zu 1. Ein einzelner Arbeiter an der Haspel konnte - unter der Annahme, dass 150 N den maximalen Krafteinsatz darstellen, den eine Person über einen längeren Zeitraum ausüben kann - Lasten von 1800 N heben (3 Rollen x 600 N).
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 12:1, a single person working the winch could raise loads of 1800 N (3 pulleys x 600 N), assuming that 150 N represents the maximum effort that person can exert (over a longer time period).
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| Author | Eric Gaba (Sting - fr:Sting) | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:36, 17 November 2010 | | 1,520 × 1,370 (117 KB) | wikimediacommons>Sting | Error correction |
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