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The benefits of contra-rotating propeller design have long been recognized. The recent introduction of a pod or thruster ...

http://www.wartsila.com/Wartsila/global/docs/en/ship_power/media_publications/marine_news/2004_1/hydrodynamic.pdf

large bulk carrier, the contra-rotating propeller (CRP) is an established unique technology of IHI Marine United Inc (IHIMU), ...

http://www.wartsila.com/Wartsila/global/docs/en/ship_power/media_publications/brochures/ihimu-contra-rotating-propellers-brochure-2009.pdf

Manen JD van (1956) Contra-rotating propellers, Trans INA. 98:327-344. 6. Glover EJ (1967) Contrarotating propellers for high speed cargo ...

http://www.springerlink.com/index/T821016235773860.pdf

and contra-rotating propellers were used for the experiments. .... rear propeller plane it is clear how in the contra-rotating propeller pod drive model the ...

http://www.springerlink.com/index/g057707846r55230.pdf

contra-rotating propellers (CRPs), in their use in outboard propulsors for fast-planing craft ... theory (1952), for the study of contra-rotating propellers ...

http://www.informaworld.com/index/783985452.pdf

in a ship propulsion system where an additional contra-rotating propeller recovers energy from the main propeller slip stream. ...

http://www.informaworld.com/index/917000440.pdf

This paper describes a coaxial contra-rotating propeller (CCRP) system to calculate the ..... K.: World's First Contra-rotating Propeller System Successful ...

http://versita.metapress.com/index/5466071437U57475.pdf

The contra-rotating propeller (CRP) is an energy saving system in which two propellers are installed in tandem on a shaft center line and driven in reverse ...

http://www.mesj.or.jp/mesj_e/english/pub/english/pdf/mv27n021999p121.pdf

oversea fishing equipped with contra-rotating type hybrid propulsion system and an electric propulsion cargo ship equipped with contra-rotating propeller ...

http://www.mesj.or.jp/mesj_e/english/pub/yb/pdf07/YB07_5.pdf

were built by applying the Contra-Rotating Propeller. (hereinafter called CRP) for coastal trade .... CRP, which consists of two contra-rotating propellers ...

http://www.ihi.co.jp/ihi/file/technologygihou2/10013_1.pdf

a large bulk carrier, the contra-rotating propeller (CRP) is an established unique technology of IHI Marine United, that can bring large gains of ship's ...

http://www.ihi.co.jp/ihimu/images/seihin/denkieibun.pdf

Contrarotating Propellers small-diameter thrusters for marine robots. Progress Report • 2.993 Special Topics in Mechanical Engineering • February 8, 2006 ...

http://rov.mit.edu/documents/2006/mjsCRprogress08Feb.pdf

Contra-Rotating Propellers. Teuvo Ronkainen. DP Conference Houston ... Contra-Rotating Propellers – or CRP's – are commonly accepted as the propulsion ...

http://www.dynamic-positioning.com/dp2006/thrusters_jukola.pdf

contra-rotating (CRP) and ducted propellers. The main difficulty in this analysis is the ...... mance of contra-rotating propellers by lifting surface ...

http://cavity.ce.utexas.edu/kinnas/kinnasgu03.pdf

measuivement of unsteady forces and moments on contrarotating propellers in the ... loading on contrarotating propellers was used to calculate values ...

http://www.stormingmedia.us/73/7332/A733230.pdf

Contaz azimuthing thruster with contra-rotating propellers. Features. Contaz combines the benefits of contra rotating propellers with azimuth thrusters ...

http://shipdesign.3net.pl/images/dyn/08.UlAq-2p-27.11.02.pdf

C Contra-rotating propellers. (The figure following indicates the number of ...... Torque Coefficients for Front Propeller of Contra-rotating Pair, at ...

http://naca.central.cranfield.ac.uk/reports/arc/rm/2218.pdf

propeller thrust on tht angle of dowmmsh i?nd the velocity. It th,: tr11pmle. Nc lttmpt at detailed .... FLAPS DOWN. (CONTRA -ROTATING PROPELLERS ) ...

http://naca.central.cranfield.ac.uk/reports/arc/cp/0021.pdf

box to a contra- rotating tidal turbine. The contra-rotating tidal turbine is a ..... "Analysis of Counter-Rotating Propeller. Performance" AIAA ...

http://ieeexplore.ieee.org/iel5/4472734/4487657/04487824.pdf?arnumber=4487824

K. Wilson, "MI'S Contra-Rotating Prop System for. VLCC's", Diesel & Gas Turbine Worldwide, Vol. XXV, no. 2, March 1993, pp. 32 - 34. 3, pp. 482 - 487. ...

http://ieeexplore.ieee.org/iel2/1135/8608/00377476.pdf?arnumber=377476

- Related articles

http://www.mhi.co.jp/technology/review/pdf/e416/e416338.pdf

needed the development of a ducted contra- rotating propeller for creating ... That was a great day for me when I saw the contra rotating propeller designed ...

http://www.nagauniv.org.in/menu/vcdesk/2nd_NU_Convocation.pdf

-Comparison among Ducted, Triple and Contrarotating Screw Propellers- ... propeller: outward turning) and contrarotating propellers, are 82000ps, 84000ps, ...

http://www.nmri.go.jp/main/publications/paper/pdf/12/16/02/PNM12160202-00.pdf

designed and constructed for the tests of contra-rotating propeller models. ... tests, the performance of the contra-rotating propeller in open condition ...

http://www.nmri.go.jp/main/publications/paper/pdf/12/02/02/PNM12020202-00.pdf

Noise optimised configuration. Contra rotating propellers. Noise optimised configuration. Propeller pitch change mechanism maintains optimum propeller angle ...

http://www.newac.eu/uploads/media/Clean_Sky_SAGE_ITD_presentation_M.Pacey.pdf

with contra-rotating propellers for ferries in three countries. Workhorses kept clean .... pitch contra-rotating propellers installed forward, ...

http://www1.rolls-royce.com/marine/downloads/article/id6_workhorses.pdf

The coaxial contra-rotating propellers equal out both the effects of torque and RBS. My project resolves the question of whether a coaxial contra-rotating ...

http://www.usc.edu/CSSF/Current/Projects/J0121.pdf

by JP Pêgo - Related articles

http://in3.dem.ist.utl.pt/LXLASER2006/downloads/abstracts/1.1.pdf

24 Jun 2008 ... Two rows of counter-rotating propellers .... downstream rotor blades. Tip-vortex simulation for contra-rotating fans – courtesy DLR ...

http://www.omega.mmu.ac.uk/Open-Rotor-Workshop-24-June/Noise prediction methods.pdf

by T A&Mformance of a counter-rotating propeller design for a given flight & .... Another counter-rotating propeller calculation method in- ...

http://cafefoundation.org/v2/pdf_tech/Noise.Technologies/AIAA.1986.Prop.Noise.CRot.pdf

efficiency, one is to decrease hull resistance, and another is to increase the propeller efficiency. Contra-Rotating Propeller (CRP) is one of the solutions ...

http://www.nakashima.co.jp/ips10/IPS'10Abstract_2G_Rev2.pdf

large diameter propellers”, “contra-rotating propellers(CRP)” and “small blade area propellers”. Especially, supply results of CRP are increasing for ...

http://www.nakashima.co.jp/ips10/IPS'10Abstract_1G_Rev2.pdf

by J Jacobson - 2007 - Cited by 2

http://scholar.lib.vt.edu/theses/available/etd-05142007-111536/unrestricted/JacobsonMastersThesis.pdf

File Format: PDF/Adobe Acrobatby T Stefanov-Wagner - 2006A project was undertaken to design and build a contra-rotating propeller ..... contra-rotating thruster assembly. The propellers would be designed and ...

http://dspace.mit.edu/bitstream/handle/1721.1/36697/77538687.pdf?sequence=1

interaction between contra-rotating propellers when the number of blades on the forward and aft propellers were the same». In discussing Appendix 2a Mr J B ...

http://ittc.sname.org/proc13/Propeller Session/Summary of Discussion.pdf

relative to contra-rotating propellers is completed. A re-calculation of the induction factors, as defined in my afore-mentioned paper, will follow. ...

http://ittc.sname.org/proc7/Theory of Propellers.pdf

featuring the podded propulsor with contra-rotating propeller (CRP). Advanced concept and systems are applied in the research and ...

http://www.isope.org/publications/proceedings/ISOPE/ISOPE 2005/papers/441_JSC_258.pdf

bine with CRP (Contra Rotating Propeller) from several ... Contra Rotating Propeller, Dual Fuel. Diesel, Transportation cost ...

http://www.isope.org/publications/proceedings/ISOPE/ISOPE 1994/Abstract Pages/I94v4p578.pdf

18 Feb 2009 ... devices intended to recover energy lost in the wake, such as contra rotating propellers and freewheeling vanes behind the propeller itself, ...

http://www.unctad.org/sections/wcmu/docs/cimem1p07_en.pdf

with contra-rotating propellers. Azimuth thrusters for tug, work boat and coastal ferry applications. (250 kW – 10 MW). Ulstein Aquamaster azimuth thrusters ...

http://www.maritime-suppliers.com/imidocs/0632P003 Tugs, Work boats and Coastal Ferries.pdf

Ducted propellers iii-. Contra-rotating propellers iv-. Overlapping propellers v-. Controllable pitch propellers vi-. Waterjet propulsion system ...

http://www.gidb.itu.edu.tr/staff/emin/Lectures/Ship_Hydro/propulsion_systems.pdf

Contra-rotating propellers high thrust available from the Azipod unit; equaling that of two tug boats.” “When slow-steaming at five knots ...

http://library.abb.com/GLOBAL/SCOT/scot271.nsf/VerityDisplay/94AA9CEE1965090DC12571D900432D64/$File/64-67 3M654_ENG72dpi.pdf

power turbine to contra- rotating assemblies. Transmissions system transfers energy from free power turbine to contra- rotating assemblies. Propeller pitch ...

http://midlandsaerospace.org.uk/cgi-bin/maa/SISite/data/files/Nick Peacock no.2.pdf

Contra-Rotating. Propellers Cut. Rotational Losses in the Flow. Leaving the ... Contra-rotating propellers increase acceleration by recovering energy ...

http://people.cedarville.edu/stuorg/solsplsh/photos/2009/Version2e.pdf

Normally, propellers decrease in efficiency as the number of blades increases, due to increased tip-vortex losses.5 When one contra-rotating propeller is ...

http://aaronbeekay.net/EE First Draft.pdf

contra-rotating prop (CRP) was tried on many air- planes. Having two props rotating in ... The Maxx Products 350W Contra-. Rotating Prop Drive System pro- ...

http://www.maxxprod.com/mpi/mpi-266_files/HIMAX CR2816 review.pdf

18 Sep 2009 ... Electric Propulsion & Contra-rotating Podded Propeller : 10% Efficiency Improvement. ☆ “Buttock-flow” Optimized Hull Form : 10% Fuel saving ...

http://conference.wista-uk.co.uk/presentations/classnk.pdf

ered, with or without bubble canopy, contra-rotating propellers. All had a weird layout: convergent beams towards the rail, a wing with composite sweep and ...

http://cmeunier.chez-alice.fr/Fg_6.pdf

a propeller (or double propeller, contrarotating) with a long driveshaft ... Driving contra-rotating propellers was complex, and if only one propeller was ...

http://cmeunier.chez-alice.fr/Fg_5.pdf

by electric motor driven contra-rotating propeller ... Motors. （2 sets）. Contra-rotating gear. Outer shaft. Inner shaft. Fore Propeller. Aft propeller ...

http://events.nace.org/conferences/IMCS2008/papers/10.pdf