Catamaran Resistance and Propulsion Calculations

@mobimubasir

Hello there, I can calculate the catamaran calm-water resistance across the operating speed range, break it into frictional, residual, air, appendage, and correlation components, and size propulsion power with hotel loads and service/sea margins. I’ll provide a traceable Excel/Python/MATLAB calculation file, resistance and power curves, a one-page design summary table, and a short technical note explaining assumptions, coefficients, calibration, and sensitivity checks.

@beingmrme

HI, I can deliver detailed catamaran resistance and propulsion analysis support using accurate hydrodynamic calculations, CFD/engineering validation, and professionally documented technical reporting optimized for marine performance evaluation. 1️⃣ Do you already have the catamaran hull geometry, CAD files, or hydrostatic data available? 2️⃣ Which software/tools should be used—Python, MATLAB, Maxsurf, ANSYS, or CFD-based workflows? 3️⃣ Do you need only resistance calculations or also propulsion sizing, power estimation, and full technical reporting? Warm regards, The Blend Nation.

@maxscender

I can help you. My approach centers on using your existing tank-test data to calibrate the theoretical models—specifically adjusting the resistance interference factors (viscous and wave) that standard empirical methods often oversimplify for catamarans. I will build a transparent Python or Excel tool that breaks down resistance using the ITTC 1957 friction line combined with a Slender Body Theory (Michlet) or Insel/Molland approach for wave-making components. Because you have RPM data, I can back-calculate the propulsive coefficients to ensure the power curves are anchored in reality, not just theory. The final model will explicitly include your 10% sea margin and hotel loads, delivering a traceable calculation chain where every coefficient is defined and adjustable for future sensitivity analysis.

@EhtishamHaider1

As an Electrical Engineer and Data Scientist, my expertise extends into fields that are crucial to your project. Not only am I proficient in MATLAB, which will make it easier for me to create powerful simulations and models for your catamaran design, but my experience extends to Excel as well. This means that not only can I deliver the calculation file and brief technical note you require, but also design a professional and clear one-page summary table for your design report, providing a streamlined result. Of course, what sets me apart is my ability to deeply understand data, crunch numbers, and transform them into actionable insights - ideal for converting your hydrodynamic data into meaningful metrics. I’ve worked on various projects demanding accuracy and reproducibility, often under tight deadlines. I assure you that the results of my work will always be trustworthy; not only meeting the ±3% criteria but also clearly identifying units and references, making it easy to evaluate them.

@serviceaxisgroup

Hi, I can help with solid calm-water resistance and propulsion power figures to freeze your catamaran lines plan and lock engine selection. I’ll build a fully traceable calculation script using your LOA/beam/Cp/prismatic data plus your speed–RPM tank-test results, running an agreed empirical route (Holtrop-Mennen/Savitsky/Michlet) or CFD workflow and then producing resistance and power curves with sensitivities. I’ll start by confirming assumptions, wetted area/coefficients, and correlation steps, and I’ll deliver inputs+formulas so you can rerun and verify ±3% easily. What exact propulsor/appendage set should I include (ailerons, struts, transom gear)? And do you want the 10% sea margin applied to delivered power or shaft power?