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Volume 5
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Article

The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed

by
Anna Theresia Stadler
1,*,
Martin Schönauer
1,
Roozbeh Aslani
2,
Werner Baumgartner
1 and
Tillmann Philippi
1
1
Institute of Biomedical Mechatronics, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria
2
Institute of Fluid Mechanics and Heat Transfer, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria
*
Author to whom correspondence should be addressed.
Biomimetics 2020, 5(1), 7; https://doi.org/10.3390/biomimetics5010007
Submission received: 6 December 2019 / Revised: 28 January 2020 / Accepted: 3 February 2020 / Published: 17 February 2020
(This article belongs to the Special Issue Selected Papers from ICBE2019)
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Abstract

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®. 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.
Keywords: flexible stern; Fin Ray Effect®; canoe boat; lateral boat movement flexible stern; Fin Ray Effect®; canoe boat; lateral boat movement

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MDPI and ACS Style

Stadler, A.T.; Schönauer, M.; Aslani, R.; Baumgartner, W.; Philippi, T. The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed. Biomimetics 2020, 5, 7. https://doi.org/10.3390/biomimetics5010007

AMA Style

Stadler AT, Schönauer M, Aslani R, Baumgartner W, Philippi T. The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed. Biomimetics. 2020; 5(1):7. https://doi.org/10.3390/biomimetics5010007

Chicago/Turabian Style

Stadler, Anna Theresia, Martin Schönauer, Roozbeh Aslani, Werner Baumgartner, and Tillmann Philippi. 2020. "The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed" Biomimetics 5, no. 1: 7. https://doi.org/10.3390/biomimetics5010007

APA Style

Stadler, A. T., Schönauer, M., Aslani, R., Baumgartner, W., & Philippi, T. (2020). The Impact of a Flexible Stern on Canoe Boat Maneuverability and Speed. Biomimetics, 5(1), 7. https://doi.org/10.3390/biomimetics5010007

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