Download - Vicprop - Prop Calculator for Displacement and Semi-displacement Hulls

Transcript

  • 3/10/2015 VicpropPropcalculatorforDisplacementandsemidisplacementhulls

    http://www.vicprop.com/displacement_size.php?action=calculate 1/3

    .

    DataInputWaterlinelengthinfeet: 28.87feetBeamatthewaterlineinfeet: 8.98feetHulldraftinfeet(excludingkeel): 2.95feetVesselweightinpounds: 2204lbsEngineHorsepower: 250HPNumberofengines: 2TotalEngineHorsepower: 500HPEngineR.P.M.(max): 5000RPMGearRatio: 2.08:1ShaftR.P.M.(max): 2404RPMNumberofshaftbearings(pershaft): 1DesiredspeedinKnots: 30knots

    HorsepowerCalculationsThiswillcalculatethemaximumhorsepowerandtorqueavailableattheprop(s).Totalavailablehorsepowerattheengine(s): 500HPTotalavailabletorqueft/lbsattheengine(s): 525ft/lbsHorsepowerlossof3%pergearbox: 15.0HP

    Horsepowerlossof1.5%pershaftbearing: 7.5HPTotalhorsepoweravailableatthepropeller(s): 477.5HP

  • 3/10/2015 VicpropPropcalculatorforDisplacementandsemidisplacementhulls

    http://www.vicprop.com/displacement_size.php?action=calculate 2/3

    Totaltorqueft/lbsavailableatthepropeller(s): 1043ft/lbs

    Speed&PowerCalculationsBasicdisplacementspeedandhorsepowerrequiredDisplacementhullspeed(1.34Xsqrtofwaterlinelength): 7.20KnotsMinimumhorsepowerrequiredatpropeller(s)forHullspeed: 4.8HPCalculationsbasedondesiredspeedandavailableHPHPrequiredatpropeller(s)fordesired30knotsspeed: 316HPEstimatedmaximumspeedwithexisting500horsepower:Thisisthespeedwewilluseforthepropellersize. 34.38Knots

    AtthispointitisimportanttonotethatallofthecalculationsabovearebasedonfullRPMandHP.MostenginesareratedtorunatapercentageofthierfullRPM.Thisiswhatwilldetermineyourmaximumcruisingspeed.Thepropellersizingcalculationsbelowarebasedon90%offullRPM.Thisgivestheenginesomereservepowertoallowforvariableloadinginthevessel.

    PropellerSizeNumberofblades Diameter(inches) Pitch(inches)2Blade 18.7 X 22.03Blade 17.8 X 21.84Blade 16.8 X 21.4Thepropellersizesshownabovedonotcontaincalculationsforcavitationorbladeloading.Ifyoufindthattherecommendedpropelleristoolargetofityourvessel,youcantryincreasingtheshaftspeed.Failingthis,youcanreducethediameterandincreasethepitchattheexpenseofyourpropellerefficiency.Theruleofthumbis1inchofdiameterisequalto11/2to2inchesofpitch.

  • 3/10/2015 VicpropPropcalculatorforDisplacementandsemidisplacementhulls

    http://www.vicprop.com/displacement_size.php?action=calculate 3/3

    WebsiteandallcontentscopyrightVictoriaPropellerLtd.2012,allrightsreserved.


Top Related

Carving Ship Model Hulls

Carving Ship Model Hulls

Hydrodynamics of single-deadrise hulls and their … · Asymmetric planing hulls are often ... deadrise hulls were conducted by Savitsky ... Empirical correlations for hydrodynamic

Hydrodynamics of single-deadrise hulls and their … · Asymmetric planing hulls are often ... deadrise hulls were conducted by Savitsky ... Empirical correlations for hydrodynamic

Practical CFD Simulations for Planing Hulls

Practical CFD Simulations for Planing Hulls

HULLS Once Fired Hulls - Precision Reloading UNIB. . . Unibody BW. . . . . . . .Basewad Once Fired Hulls Once- red hulls are a great way to keep your reloading cost down, o ered at

HULLS Once Fired Hulls - Precision Reloading UNIB. . . Unibody BW. . . . . . . .Basewad Once Fired Hulls Once- red hulls are a great way to keep your reloading cost down, o ered at

Merging two upper hulls

Merging two upper hulls

BOATING PACIFIC SEPTEMBER/OCTOBER 2013 …Designed with modern lines and soft curves, the full displacement hulls of these vessels provide for long range cruising thanks to their diesel/electric

BOATING PACIFIC SEPTEMBER/OCTOBER 2013 …Designed with modern lines and soft curves, the full displacement hulls of these vessels provide for long range cruising thanks to their diesel/electric

Image-Based Visual Hulls

Image-Based Visual Hulls

Institute Time Clauses (Hulls) (ITCH) vs Nordic Plan€¦ · Institute Time Clauses (Hulls) (ITCH) vs Nordic Plan This is an overview of the Institute Time Clauses Hulls 1983 (ITCH)

Institute Time Clauses (Hulls) (ITCH) vs Nordic Plan€¦ · Institute Time Clauses (Hulls) (ITCH) vs Nordic Plan This is an overview of the Institute Time Clauses Hulls 1983 (ITCH)

Languages
Pages
Legal

Copyright © 2022 FDOCUMENTS