# Composite propeller

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{{Short description|Type of ship's propeller}}

Marine '''composite propellers''' are [ship propellers](/source/Propeller) made from [fiber composites](/source/Fibre-composite). These composites are made from materials like [glass](/source/Glass_fiber) or [carbon fibers](/source/carbon_fibers) and infused with a high-strength [resin](/source/resin) like [epoxy](/source/epoxy) or [polyimide](/source/polyimide).{{citation needed|date=May 2011}}

==Attributes==
Composite [propeller](/source/propeller)s can be made using a [lay-up process](/source/lay-up_process), leading to [anisotropic](/source/Anisotropy) properties. This can create a passive adaptation of self-twisting propeller blades, which are considered more [energy-efficient](/source/Energy_efficiency_in_transport) when compared to rigid propeller blades.<ref>{{Cite journal|last1=Liu|first1=Zhanke|last2=Young|first2=Yin L.|date=2009-08-01|title=Utilization of bend–twist coupling for performance enhancement of composite marine propellers|url=https://www.sciencedirect.com/science/article/pii/S0889974609000498|journal=Journal of Fluids and Structures|language=en|volume=25|issue=6|pages=1102–1116|doi=10.1016/j.jfluidstructs.2009.04.005|issn=0889-9746|url-access=subscription}}</ref> 

==Longevity==
Composite materials may be considered an environmentally friendly option for propeller blades in some applications. While the composite blades are more resistant to corrosion and impact damage than many [metal-alloy](/source/Metal_alloy) propeller blades, the water saturation and the propeller application decrease the longevity of composite propellers.<ref>[http://journals.sagepub.com/doi/abs/10.1177/002199839202601407 Effects of Seawater Immersion on the Impact Resistance of Glass Fiber Reinforced Epoxy Composites]</ref><ref>[http://www.technicaljournalsonline.com/jers/VOL%20II/JERS%20VOL%20II%20ISSUE%20II%20APRIL%20JUNE%202011/ARTICLE%2019%20JERS%20VOL%20II%20ISSUE%20II%20APRIL-%20JUNE%202011.pdf Dr. S. Selvaraju, S.Ilaiyavel, 2011 APPLICATIONS OF COMPOSITES IN MARINE INDUSTRY]</ref><ref>{{Cite journal|last1=Yamatogi|first1=Toshio|last2=Murayama|first2=Hideaki|last3=Uzawa|first3=Kiyoshi|last4=Mishima|first4=Takahiro|last5=Ishihara|first5=Yasuaki|date=2011|title=Study on Composite Material Marine Propellers|url=https://www.jstage.jst.go.jp/article/jime/46/3/46_330/_article|journal=Marine Engineering|volume=46|issue=3|pages=330–340|doi=10.5988/jime.46.330|s2cid=135597704|doi-access=free}}</ref> 

==References==
{{Reflist}}

Category:Propellers

{{engineering-stub}}

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Adapted from the Wikipedia article [Composite propeller](https://en.wikipedia.org/wiki/Composite_propeller) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Composite_propeller?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.