Two without a helmsman
|Two without a helmsman|
|length||approx. 9.5 m|
|Minimum weight||27 kg|
|Olympic boat class|
|Men||1904, 1908, since 1924|
|World best times (2000 m)|
|Men:||6: 08.50 (July 28, 2012 in London)|
|Eric Murray , Hamish Bond|
|Women:||6: 49.08 (June 18, 2017, Poznan )|
|Grace Prendergast , Kerri Gowler|
|Men lightweight:||6: 22.91 ( Aug 29, 2014, Bosbaan )|
|Simon Niepmann , Lucas Tramèr|
|Women lightweight:||7:18, 32 ( Sep. 7, 1997, Lac d'Aiguebelette )|
|Eliza Blair , Justine Joyce|
The two without a helmsman or two without a helmsman (abbreviation 2- ) is a boat class in rowing . Two rowers sit in the boat, each driving the boat with a belt . The boat class is alternatively referred to as a strap-two or shortened as a two-without and has long been an Olympic boat class for men and women.
The two-man without is the most demanding boat class in rowing. This is mainly due to the difficulty of maintaining balance: rowing boats are kept in balance by the oars. In the two-man oars, each rower is solely responsible for one side and must therefore harmonize well with his partner.
The rowers in (unlimited) twos without a helmsman do not have to adhere to a weight limit. This does not apply to the non-Olympic lightweight variant: men's teams may weigh a maximum of 70 kg on average, women's teams 57 kg. The classic competition route in two without a helmsman corresponds to the Olympic distance of 2000 m.
The material and construction of the boat are similar to those of typical racing rowing boats. The boat is about 9.5 meters long, about 33 cm wide at the waterline, and weighs at least 27 kg. An outrigger is attached to the boat on each side of the boat . Since there is no helmsman on board, the two-man without a foot control is built and steered.
In addition to the boat class described here, the two-man genre generally includes the two-man with helmsman (2+) and the double-scull (2x). The two-man with is like the two-man without a belt boat class, as such, because of the presence of the helmsman, a little slower and less important than the two-man without . The double scull is a scull without a helmsman and is a bit faster than the double without a helmsman. The two-man without a helmsman plays no role in recreational and touring rowing, and they are not common as gig types.
A special feature of this boat class is that when rowing with oars, the optimal stroke technique differs between the two places. If both are rowing exactly the same, the boat is clearly walking in a serpentine line. It greed at the beat. The reason for this is that the oars exert a different torque on the boat during the stroke. In the first part of the stroke, when the oars are swung forward towards the bow , the rudder blade of the forward rower grips the water at a greater distance from the center of gravity of the boat. As a result, the boat is driven into a slight curve despite the same force on the oars. In the back part of the stroke, when the oars are swung backwards, the situation is reversed and the boat makes a slight turn in the opposite direction. Overall, the boat is going straight ahead, but it loses energy due to the constant cornering.
With a suitable striking technique in the form of an interpersonal synergy, the loss of energy through serpentine lines can be minimized. The rowers must pull differently so that the torques on the boat equalize during the stroke. The batsman in the back should reach his maximum strength a little earlier than the bowman (dynamic synchronization).
In addition to the physiological peculiarities, special demands on perception come into play in two. Due to the different possibilities in the boat, both rowers have to get along with different information and feedback. Good two-man rowers are able to adjust to their respective partners, although it is still unclear whether the stroke position always plays the leading role in team synchronization (cf. Fahrig, 2010).
Successful rowers in two without a helmsman
The most successful two-man rowers in history are Sir Matthew Pinsent (2 × Olympic gold and 6 world championship titles in two-without) and Sir Steven Redgrave (3 × Olympic gold and 5 world championship titles in two-without). Outstanding successes were also achieved by the German rowers Bernd Landvoigt and Jörg Landvoigt , who were twice Olympic and four times world champions in this boat class, as well as the New Zealand duo of Eric Murray and Hamish Bond , who were referred to as "Kiwipair" and did not have a single race in this class from 2008 to 2016 Lost boat class and won six world championships and two Olympic victories during this time.
- Stephan Fahrig Federal Institute for Sport Science (Ed.): On the interaction problem in the Riemenzweier of rowing. Sportverlag Strauss, 2010, ISBN 978-3-86884-514-3 .
- Dirk Kurbjuweit : Two without. (Novella)
- Stephan Fahrig Kerstin Witte: Coordination of the interaction in the rowing scull without a helmsman. In: competitive sport. 1/2007, Philippka-Sportverlag .
- Stephan Fahrig Kerstin Witte: Investigations into the coordination of the interaction in the rowing scull without a helmsman. Research report on the research project VF07 / 06/10/2005 at the Federal Institute for Sport Science.
- Stephan Fahrig Jörg Reinking, Kerstin Witte, Volker Lippens: GPS-aided analysis of the yaw movement in oars or stems to investigate interaction errors. on the occasion of the Sport & Technology Symposium SPOTEC in Magdeburg, 2005.
- Wolfgang Fritsch: manual for rowing: training - stamina - free time . 4th, revised edition. Meyer & Meyer Verlag, Aachen 2006, ISBN 978-3-89899-111-7 .
- Rowing competition rules (RWR) of the German Rowing Association; valid from January 1, 2016. (PDF; 666 kB) (No longer available online.) In: www.rudern.de. German Rowing Association, archived from the original on April 29, 2016 ; Retrieved April 29, 2016 . 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.
- Dimensions of various double versions at the Empacher shipyard. (No longer available online.) Empacher boatyard , archived from the original on December 23, 2015 ; accessed on December 23, 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.