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Fountom Marine Engineering & Design

Propeller Strength Calculation

Propeller strength calculation service verifying that a propeller design is safe against blade damage or fracture, based on ship particulars and propeller data.

Description

Fountom's Propeller Strength Calculation service verifies a propeller design after the design stage to guard against blade damage or fracture. The calculation considers all relevant propeller parameters and gives a clear pass/fail result.

Input data required (typical)

  • Ship particulars: LOA, LBP, breadth, depth, draft, ship type, class, block coefficient
  • Propeller type, material, number of propellers and blades
  • Wake fraction and thrust deduction
  • Brake power, shaft efficiency and propeller rpm
  • Propeller immersion and cavitation type

Specifications

Name of ship:New Titanic
LOA:47.00 m
LBP:40.50 m
BREADTH:9.40 m
DEPTH:4.00 m
SUMMER DRAFT:2.80 m
TYPE:Double hull, Oil tanker
CLASS:PRS
GT:532.189
NT:457.5
IMO NO.:9769582
PROPELLER TYPE:Fixed pitch propeller
MATERIAL OF PROPELLER:Cu3 Ni-Al Bronze
NO. OF PROPELLERS:2
NUMBER OF BLADES:4
WAKE FRICTION:0.243
THRUST DEDUCTION:0.171
BREAK POWER:565 HP
SHAFT EFFIECENCY:75%
RPM OF PROPELLER:408
DRAFT:2.8 m
SUBMERGE OF PROPELLER:1.50 M "Height of Water Above The Upper Tip"
BLOCK COFFIECENT:0.749
SPECIFIC WEIGHT OF SEA WATER:1.025 t/m3
CAVITATION TYPE:bubble cavitation

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