Roll seat
The roller seat is a component of a sport rowing boat . It is used to extend the stroke of the oar and has the shape of a seat with two axes and four rollers that is ergonomically adapted to the buttocks of a rower .
Function and structure
The roller seat is placed on two parallel roller rails in the rowing boat and guided by them when rolling. The rower sits on the movable roller seat and can use his legs to extend the stroke. The feet are fixed to the boat via the stretcher . By using the strong leg muscles, the propulsion can be increased considerably.
The seat shell is usually made of wood, less often of plastic or carbon fiber composite materials. Often there are two holes for the pelvic bone on the seat . Due to the technical limitations of the length of roller tracks, the chassis was equipped with a so-called slide for a long time, which lengthened the taxiway by about 10 centimeters. In the meantime, low-maintenance and robust ball bearing designs have established themselves .
The roller rails, also called the roller track, are two parallel metal rails that guide the roller seat. The length of the roller tracks is around 75 to 82 centimeters today. A corrosion-resistant aluminum alloy is often used as the material . Until the 1960s, shorter brass or stainless steel rails were used in conjunction with a sliding slide seat.
The track width of the rails is variable and depends in particular on the boat class. If possible, a large track width is used to avoid the calves hitting the ends of the rails. In single and double, this is not always possible due to the narrow design. The slight incline (approx. One to two centimeters gain in height to the bow end) usually created by a wooden wedge under the rails supports the rower in correctly performing the rowing technique.
development
Roller seat and roller rails were developed in America and England from around 1857. In the beginning there was a lot of experimentation with lubricants on sports pants instead of rollers. From around 1883 the rolling seat, which has since been technically significantly refined, became generally accepted in rowing.
Alternatives
The roller boom represents an alternative concept for extending the stroke of the oar . The rower sits on a seat that is fixedly mounted on the rowing boat, while the boom is rollable. The advantage here is that the weight of the rower is not shifted as much as with the roll-seat concept in the boat, and therefore the pitching around the transverse axis is considerably reduced. In rowing regattas , however, the roller jib concept has been banned since 1984 after it had dominated the rowing world championships in previous years. Rolling arms therefore only play a subordinate role in rowing today.
literature
- Wolfgang Fritsch: manual for rowing . 4th, revised edition. Meyer & Meyer Verlag, Aachen 2006, ISBN 978-3-89899-111-7 , p. 47 .
Web links
Individual evidence
- ↑ a b c d e Rowing Club Flensburg: The boat material, its development and technology: the roll seat. Retrieved April 18, 2013 .
- ↑ a b c d e f g German Rowing Association : Roller seats and taxiway. (No longer available online.) Archived from the original on December 8, 2015 ; accessed on November 27, 2015 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ A b Bill Miller: The Development of Rowing Equipment. (No longer available online.) Archived from the original on July 13, 2016 ; Retrieved April 18, 2013 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
