Economic viability of small freighters in the U.S. coastal trade, Steven Woods, March 2024
In this paper, the author describes how, given sufficient cargo availability, small sailing cargo vessels can compete against trucking in the northeastern U.S.
In this paper, the author describes how, given sufficient cargo availability, small sailing cargo vessels can compete against trucking in the northeastern U.S.
| Steven Woods, Economic viability of small sail freighters in the US coastal trade |
A second look at the Propeller Sail high lift device for sailing cargo ships using distributed, powered propellers., November 2023
| A Second Look at the Propeller Sail |
Preliminary analysis of a new high lift device for sailing cargo ships using distributed propellers, February 2023
This paper describes a novel method for generating high lift from wing sails, including the use of contra-vortex propellers at wingtips.
This paper describes a novel method for generating high lift from wing sails, including the use of contra-vortex propellers at wingtips.
| Distributed propellers for high lift.pdf |
Open VPP: an open-source velocity prediction program for large sailing cargo vessels, January 2023
This work describes and documents OpenVPP, an open-source VPP for large sailing cargo vessels. Source code included.
This work describes and documents OpenVPP, an open-source VPP for large sailing cargo vessels. Source code included.
| Open VPP User Manual.pdf |
| OpenVPP User Manual Updates.docx |
Proceedings: Conference on Small Scale Inland & Coastal Sail Freight, Hudson River Maritime Museum, 5 November 2022
| HNRM Proceedings.pdf |
Sustainability in Ship Design Conference, Webb Institute, Glenn Cove NY 7-8 November, 2022. Video recordings of all presentations.
Wind tunnel tests for a six-masted sailing vessel by Prölss: Translation of B. Wagner's "Windkanalversuche füur einen sechsmastigen Segler nach Prölss", by L.A. Ribarov, published 1 September 2022
This translation of another classic work by Wagner describes experimental results of lift, drag and moment coefficients of Prolss's Dyna-Rig sails, as well as for conventional sails. The results show the greater efficacy of the Dyna-Rig sails on multi-masted vessels is further enhanced by increasing the sail angle of attack in the aft direction.
This translation of another classic work by Wagner describes experimental results of lift, drag and moment coefficients of Prolss's Dyna-Rig sails, as well as for conventional sails. The results show the greater efficacy of the Dyna-Rig sails on multi-masted vessels is further enhanced by increasing the sail angle of attack in the aft direction.
| Wind tunnel tests of six-masted sailing vessel |
Translation of B. Wagner's Angled towing tests for a sailing vessel hull with and without bar keel and for the Mariner, by L.A. Ribarov, published 10 May 2022
Originally published in German by Institute for Shipbuilding of the University of Hamburg, Report No. 186, 1968, Schrägschleppversuche für einen Seglerrumpf mit und ohne Balkenkiel und für den “Mariner”, by B. Wagner. This is a classic work, with lift and drag of commercial ship hulls under leeway. In addition to conducting tests of two hulls, the author developed parametric equations for lift, drag and moment coefficients for hulls with and without rudders.
Originally published in German by Institute for Shipbuilding of the University of Hamburg, Report No. 186, 1968, Schrägschleppversuche für einen Seglerrumpf mit und ohne Balkenkiel und für den “Mariner”, by B. Wagner. This is a classic work, with lift and drag of commercial ship hulls under leeway. In addition to conducting tests of two hulls, the author developed parametric equations for lift, drag and moment coefficients for hulls with and without rudders.
| Wagner Bericht no. 186, Angled towing tests for a sailing vessel hull with and without bar keel and for the Mariner.pdf |
JMWE Editor's Trip Report to Construction Site of Sailing Vessel Ceiba, Punta Morales, Costa Rica, March 2022
This Power-Point report gives information and images of the construction of sailing vessel Ceiba, an all-wood freighter under construction in Costa Rica. The vessel will be among the world's largest cargo vessels propelled solely by the wind, and will use a combination of traditional materials and high tech solar collectors, electric drive and high capacity storage batteries.
This Power-Point report gives information and images of the construction of sailing vessel Ceiba, an all-wood freighter under construction in Costa Rica. The vessel will be among the world's largest cargo vessels propelled solely by the wind, and will use a combination of traditional materials and high tech solar collectors, electric drive and high capacity storage batteries.
| Ceiba Editors Trip Report.pptx |
Proceedings: 2021 Natural Propulsion in Ship Design Conference at Webb Institute, November 2021
Hosted by Webb Institute, Marin Institute, and Wind Support NYC, the conference consisted of web-based presentations by industry professionals. Please follow the link below to see slides from the presentations.
https://www.webb.edu/conference-2021-npsd/
Operation of a sail freighter on the Hudson River: schooner Apollonia in 2021, by S. Woods and S. Merrett, published 2 March 2022
This paper gives insights into the operational experience of the sail freighter Apollonia, which transported cargo between upstate NY and New York City on her inaugural commercial year. The paper describes, among others, Apollonia's use of currents, winds and anchor time to effect a miserly use of fuel, and challenges us to consider alternatives to accepted shipping practices.
Hosted by Webb Institute, Marin Institute, and Wind Support NYC, the conference consisted of web-based presentations by industry professionals. Please follow the link below to see slides from the presentations.
https://www.webb.edu/conference-2021-npsd/
Operation of a sail freighter on the Hudson River: schooner Apollonia in 2021, by S. Woods and S. Merrett, published 2 March 2022
This paper gives insights into the operational experience of the sail freighter Apollonia, which transported cargo between upstate NY and New York City on her inaugural commercial year. The paper describes, among others, Apollonia's use of currents, winds and anchor time to effect a miserly use of fuel, and challenges us to consider alternatives to accepted shipping practices.
| Schooner Apollonia.pdf |
Downbursts, groundings, incompetence and other dangers to 21st century sailing vessels, JMWE, published 4 December 2021
The safety record of commercial sailing vessels operating between 1850-2012 is analyzed, with the goal of predicting vulnerabilities of large modern merchant sailing ships. Recommendations to ensure merchant sailing vessel safety are provided.
The safety record of commercial sailing vessels operating between 1850-2012 is analyzed, with the goal of predicting vulnerabilities of large modern merchant sailing ships. Recommendations to ensure merchant sailing vessel safety are provided.
| Downbursts, groundings, incompetence.pdf |
Economic viability of bulk cargo merchant sailing vessels, JMWE, published 17 August 2021
The authors find that, considering past and predicted fuel prices, bulk cargo sailing vessels of 15, 30 and 45 kDWT have a significant economic advantage over motorized vessels. 4 routes were considered: US East coast-Europe, US East coast-Africa, US West coast-Australia, and US West coast-China.
The authors find that, considering past and predicted fuel prices, bulk cargo sailing vessels of 15, 30 and 45 kDWT have a significant economic advantage over motorized vessels. 4 routes were considered: US East coast-Europe, US East coast-Africa, US West coast-Australia, and US West coast-China.
| Economic viability of bulk cargo sailing ships.pdf |
CONFERENCE ANNOUNCEMENT: Sustainability in Ship Design and Operation, November 2023 at Webb Institute and US Merchant Marine Academy .
