The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed
Paddle boats like canoes and kayaks draw a sinusoidal path when a linear movement is intended. The reason for this behavior is that each paddle stroke induces a lateral movement of the boat. In this study, we sought to reduce the so-called yawing motion. We therefore replaced the stiff stern by a fl...
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doaj-da11bfba75424dee9147bcf8821ebab62020-11-25T01:40:00ZengMDPI AGBiomimetics2313-76732020-02-0151710.3390/biomimetics5010007biomimetics5010007The Impact of a Flexible Stern on Canoe Boat Maneuverability and SpeedAnna Theresia Stadler0Martin Schönauer1Roozbeh Aslani2Werner Baumgartner3Tillmann Philippi4Institute of Biomedical Mechatronics, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaInstitute of Biomedical Mechatronics, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaInstitute of Fluid Mechanics and Heat Transfer, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaInstitute of Biomedical Mechatronics, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaInstitute of Biomedical Mechatronics, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaPaddle boats like canoes and kayaks draw a sinusoidal path when a linear movement is intended. The reason for this behavior is that each paddle stroke induces a lateral movement of the boat. In this study, we sought to reduce the so-called yawing motion. We therefore replaced the stiff stern by a flexible stern, which is based on the Fin Ray Effect<sup>®</sup>. We built down-scaled boat models and tested them in a water channel. The similarities between experimental and original setup were evaluated by means of a dimensional analysis. (Thermoplastic) elastomers with various flexibility were used for the stern construction. In the experiments conducted in the water channel, we determined the forces acting on the boat with different stern models. The results reveal that the flexible stern induced a torque counteracting the boat’s deflection, while the stiff stern caused a torque enhancing it. A paddle boat with a flexible stern could hence be a promising new method to reduce the boat’s yawing movement.https://www.mdpi.com/2313-7673/5/1/7flexible sternfin ray effect<sup>®</sup>canoe boatlateral boat movement |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Anna Theresia Stadler Martin Schönauer Roozbeh Aslani Werner Baumgartner Tillmann Philippi |
spellingShingle |
Anna Theresia Stadler Martin Schönauer Roozbeh Aslani Werner Baumgartner Tillmann Philippi The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed Biomimetics flexible stern fin ray effect<sup>®</sup> canoe boat lateral boat movement |
author_facet |
Anna Theresia Stadler Martin Schönauer Roozbeh Aslani Werner Baumgartner Tillmann Philippi |
author_sort |
Anna Theresia Stadler |
title |
The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed |
title_short |
The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed |
title_full |
The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed |
title_fullStr |
The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed |
title_full_unstemmed |
The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed |
title_sort |
impact of a flexible stern on canoe boat maneuverability and speed |
publisher |
MDPI AG |
series |
Biomimetics |
issn |
2313-7673 |
publishDate |
2020-02-01 |
description |
Paddle boats like canoes and kayaks draw a sinusoidal path when a linear movement is intended. The reason for this behavior is that each paddle stroke induces a lateral movement of the boat. In this study, we sought to reduce the so-called yawing motion. We therefore replaced the stiff stern by a flexible stern, which is based on the Fin Ray Effect<sup>®</sup>. We built down-scaled boat models and tested them in a water channel. The similarities between experimental and original setup were evaluated by means of a dimensional analysis. (Thermoplastic) elastomers with various flexibility were used for the stern construction. In the experiments conducted in the water channel, we determined the forces acting on the boat with different stern models. The results reveal that the flexible stern induced a torque counteracting the boat’s deflection, while the stiff stern caused a torque enhancing it. A paddle boat with a flexible stern could hence be a promising new method to reduce the boat’s yawing movement. |
topic |
flexible stern fin ray effect<sup>®</sup> canoe boat lateral boat movement |
url |
https://www.mdpi.com/2313-7673/5/1/7 |
work_keys_str_mv |
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