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KT kq curves and strength analysis

Understand Your Propeller

HydroComp’s PropElements brings a specialist tool to a broader engineering community. PropElements is designed not only for propeller specialists and manufacturers, but for naval architects and vehicle designers as well.

Wake-Adapted Propeller Performance

PropElements provides an optimizing design stage between parametric specification and full 3D design for manufacture. It builds on the system specification of necessary propeller characteristics (such as those from NavCad) to the design or evaluate a propeller in greater detail to meet the ship mission objectives.

Many large, merchant ships utilize custom propellers and more smaller ships, yachts, and workboats also appreciate the benefits of a custom propeller. Naval architects now have a new set of technical challenges to ensure acceptable performance and compliance with design requirements. To fully take advantage of the benefits that custom or semi-custom propellers make available – or to evaluate them in service – naval architects must look to a different kind of propeller calculation. Extensive validation studies for PropElements confirm it is unmatched in calculation fidelity and workflow efficiency.

Blade geometry definition

Used by Industries

  1. Propeller designers and builders
  2. Naval architects and engineers
  3. Hydrodynamicists and researchers
  4. Propulsion system specialists
  5. Classification societies, etc.
KT kq curves and strength analysis

Add Propeller Calcs to Your Workflow

PropElement´s numerous import/export options make it an important companion for our NavCad and PropCad software, as well as the perfect pre-processor for higher-order flow codes, CFD, and FEA. Connect the KT-KQ data to NavCad for the “Aligned Series” prediction of propeller performance. Then, when the propeller design for performance has been completed with PropElements, its design for manufacture can be conducted in PropCad.

CFD-Friendly Analysis

A closely-coupled connection between a CFD code and HydroComp PropElements software offers a high-fidelity and highly-efficient alternative to an actuator disk. Using easy-to-implement capabilities for object-oriented scripting and cross-product connectivity, it is the ideal propeller performance server for integrated hull-propeller analysis with CFD.


  1. Wake-adapted calculation tool for analysis or design.
  2. Support for open or ducted, hub- or rim-driven propellers.
  3. Proprietary features and calibration for quantitative accuracy.
  4. Design of optimum radial distributions.
  5. Analysis of thrust and power performance.
  6. Review of cavitation and other criteria.
  7. Blade strength using beam theory.
  8. Creation and export of KT-KQ curves.
  9. Import/export for CAD/CAM/CFD/FEA.
  10. Professional reports and plots, etc.
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Propeller design by efficiency

Technical Specifications

Calculation groups
  • Project
  • Geometry
  • Performance
  • Strength
  • KT-KQ
Water types
  • Fresh
  • Salt
  • Brackish
  • Custom
Solve for
  • Pitch + Camber (ideal)
  • Pitch
  • Thrust
  • Open FPP
  • Ducted FPP
  • In tunnel
Foil definition
  • Universal
  • NACA 66 mod
  • Bi-Circular
  • Segmental
  • Custom
  • Axial only
  • Axial and tangential
Wake distribution
  • User entered
  • From wake file
Tip and hub corrections
  • Custom unloading
  • Hub image
  • Hub drag
  • Rim image
Advanced features
  • Proprietary 3D corrections
  • Optimum circulation
  • Full wake-field prediction of induced velocities
  • Scripting and use as coupled calculation server
  • Mn bronze
  • NiAl bronze
  • St steel
  • Custom
  • Constant speed
  • Constant RPM
  • Constant Rn07R

Related videos and tutorials

Considering CFD for Propellers? Watch this webinar to learn how to use PropElements to conduct preliminary design space investigations, and establish benchmarks for CFD model validation.