CP Propeller Equipment - Martin's Marine Engineering Page

YTo assist a customer in selecting theoptimum propulsion system, MANB&W Alpha are able of performingspeed prognosis (fig 23), fuel oil consumptioncalculations (fig 24) and towingforce calculations (fig 25). Variousadditional alternatives may also be investigated(ie different gearboxes, propellerequipment, nozzles against freerunning propellers, varying draft andtrim of vessel, etc).2 03 34 68–3.0HubDismantlingof capX mmVB 480 75VB 560 100VB 640 115VB 740 115VB 860 135VB 980 120VBS 740 225VBS 860 265VBS 980 300VBS 1080 330VBS 1180 365VBS 1280 395DZHigh skewpropellerYVBS 1380 420VBS 1460 450VBS 1560 480VBS 1680 515Fig 22: Recommended tip clearanceXNon–skewpropellerYBaselineBaselineclearanceZ mm15–20% of D 20–25% of D Minimum 50–100Power (kW)800060004000200008 10 12 14 16Speed (knots)Fig 23: Speed prognosisConsumption (kg/hour)1600120080040008 10 12 14 16Speed (knots)Fig 24: Fuel oil consumptionTow force (kN)6005605204804404000 1 2 3 4 5 6Speed (knots)Fig 25: Tow forceThis document, and more, is available for download at Martin's Marine Engineering Page - www.dieselduck.net19