Żaglowce frachtowe z Czerwińska n. Wisłą

• Autorzy: Reszka A. W.

Warianty tytułu

EN

Freight sailboats from Czerwińsk on the river Vistula

• Języki publikacji: PL

Abstrakty

EN

Obtaining aggregate from river beds used to be, for many centuries, a well-known and widely practiced procedure in Europe. The excavated material: sand, gravel or stones, was transported to its destination by water, using a variety of boats. The freight boats discussed in the current article were built in Czerwińsk on the Vistula and were used in the first half of the 20th century. The different types of flat-bottomed boats, called respectively bał, krypa and kajlak, had been perfected by boat-builders throughout centuries and were well adapted to sailing on the Vistula, a river whose water levels have always shown a lot o f variation. The knowledge and the skills o f the bargemen, as well as the sailing experience they had, enabled them to use navigational techniques necessary in sailing on rivers that based on utilizing windpower in sailing up-stream and the speed of the river current in sailing down-stream. Square rigging, which had for a long time been typical for sailing on the Vistula, was replaced at the turn o f the 18th and 19th centuries by sprit rigging, which was easier to use and did not require large crews; this type of rigging was imported to Poland form Prussia, and along with it came the terminology for rigging. Sails were the only means of propelling boats up-stream. Sailing down-stream was based on the rafting principle, i.e. on utilizing the phenomenon of planing speed, which consists in a boat gaining acceleration with regard to the speed of the water current in the river, resulting from the boat’s hull skimming against the natural inclined plane formed by the water level of the river compared to the adopted level. The navigation technique involved was a “secret science” and that is why it remains unknown to historians of rafting on the Vistula river. Boats from Czerwińsk, and especially bats were used mainly for transporting construction gravel for building sites in Warsaw at which concrete was used. The bats were built with great care in boatbuilding workshops, which differed very little from workshops that operated in the 16th century. When in motion, the relatively narrow body o f the bat eliminated head resistance, and that is why bats could attain significant speeds under sail. The rapid development of obtaining aggregate by mechanical means at the end of the 1940s caused freight sailboats to be gradually eliminated from the Vistula, as they were unable to withstand

Słowa kluczowe

PL

żegluga; łódź; Wisła

EN

sailing; boat; Vistula river

• Wydawca: Instytut Historii Nauki im. L. i A. Birkenmajerów Polskiej Akademii Nauk
• Czasopismo: Kwartalnik Historii Nauki i Techniki
• Rocznik: 2004
• Tom: R. 49, nr 2
• Strony: 69--112
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Reszka A. W.

Bibliografia

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