Catamaran Resistance and Propulsion Calculations

@irsolutions

With over a decade of experience in high-scale systems and advanced technical architectures, I understand the importance of solid resistance and propulsion figures for your catamaran design project. Your goal of finalizing the lines plan and engine selection requires precise calculations across the operating speed range, which aligns perfectly with my background in handling high-complexity projects, such as scaling for over 1 million users and working on high-security FinTech systems. One strategic insight for ensuring project success is to utilize a combination of CFD tools like OpenFOAM or empirical methods such as Holtrop-Mennen for accurate and comprehensive results. My past success in delivering accurate and reliable data for complex projects like Telegram Mini Apps with 1 million users showcases my ability to handle the intricacies of your project with expertise. I encourage you to reach out so we can discuss the roadmap for your catamaran design. I am confident that my skills and experience make me the ideal candidate to deliver the precise resistance and propulsion calculations you need to move forward with confidence.

@softsolution2000

I have extensive experience in conducting resistance and propulsion calculations for marine vessels using both empirical methods and CFD simulations. With a background in mechanical engineering and proficiency in Python, Excel, MATLAB, and Mathematica, I am well-equipped to handle the calculations and analysis required for your catamaran design project. I can provide a detailed calculation file or script, a technical note summarizing methodology and key results, and a concise summary table for your design report. I ensure accuracy within ±3% tolerance and clear documentation of all symbols, units, and references. I am ready to start working on this project and deliver the results you need for propeller and engine selection. See the above links please. Please go through my profile its 15 years old see the work I did over the years. ---> No Win No Fee means that your satisfaction is my utmost priority. <---- Lets discuss the job details. Moreover, I am willing to start the job and perform tasks without even being hired; it is just to show my commitment to this project. Looking forward to hear from you. Regards Shah

@topcreator100

Hi there, I’ve read your catamaran project and I’m confident I can deliver a solid resistance and propulsion package. I’ll base the calm-water resistance on a transparent combination of frictional, residual, air, and appendage components using Holtrop-Mennen or Michlet with explicit calibration against your tank-test data. The deliverables will include the calculation file, a brief technical note, and a one-page summary, all with clear symbols and units. I’m interested in the project, have several experiences with similar work, and I’ll align to your instructions while keeping a practical, audit-friendly approach. Best regards,

@quan9824

Hello, Your project is very well structured from a naval-architecture standpoint, and with the hull-form parameters plus speed/RPM data already available, I can move directly into the resistance and propulsion analysis phase efficiently. I can perform the calm-water resistance breakdown using either validated empirical methods (Holtrop-Mennen, Savitsky, Michlet depending on hull regime) or CFD-assisted refinement where beneficial. The final workflow will remain fully traceable and reproducible so the results can be confidently used for engine and propeller selection. The analysis will include: • frictional resistance • residual/wave-making resistance • appendage drag • aerodynamic resistance • correlation allowance • total effective power • propulsion power with hotel-load and 10% sea-margin inclusion I also have experience with: • hydrodynamic modeling • marine performance analysis • CFD-supported validation workflows • propulsion estimation • parametric engineering simulations Once I receive the hull geometry, displacement condition, appendage details, and available tank-test measurements, I can begin immediately and provide a structured timeline for delivery. Best regards, Doan

@maxscender

I can help you finalize your catamaran’s power profile by bridging your tank-test data with a rigorous resistance breakdown. I will use a Python-based approach to calculate frictional, residual, and wave-interference components, ensuring the model is calibrated against your existing speed-vs-RPM data. My focus will be on the mathematical traceability of the 10% sea margin and hotel load calculations, providing you with a transparent script where every coefficient is clearly defined to meet your 3% reproduction requirement.

@alizain721

You want defensible resistance numbers before freezing the lines and picking engines. Good call — the real risk is undersizing or oversizing power because the resistance breakdown and calibration to your tank data are incomplete. I recently produced a tank calibrated resistance and propulsion workbook for a 14 m cruising catamaran using Holtrop Mennen adjusted to towing tank curves; the final Excel reproduced measured totals within 2.5% and included a propulsive power curve with hotel loads. My approach will be practical and reproducible: ✅ Import your hull offsets and tank speed versus RPM, compute sectional properties and displacement ✅ Run empirical resistance breakdown, calibrate residuals to your tank data, add appendage air and correlation allowances ✅ Produce propulsive power curve, add hotel loads and 10% sea margin, deliver an editable calculation file and short technical note I will meet the ±3% reproducibility, label all symbols and units, and include traceable references. To start please share hull offsets or IGES, the speed versus RPM data file, appendage details and an estimate of hotel electrical loads so I can prepare the calculation file and a delivery timetable.

@Specgi

I am a Naval Architect with strong experience in catamaran resistance and propulsion calculations, including hull resistance estimation, power prediction, and propulsion system selection for high-performance and commercial multihulls. I can perform detailed hydrodynamic assessments using recognized methods such as Holtrop, Savitsky, and CFD-supported analysis to ensure accurate prediction of vessel performance under varying operating conditions. My approach focuses on optimizing speed, fuel efficiency, and overall vessel stability. For this project, I will analyze the catamaran’s principal dimensions, displacement, hull geometry, and operating profile to determine total resistance components, including frictional, residual, and wave-making resistance. Based on the calculated resistance, I will carry out propulsion calculations to estimate required engine power, propeller performance, and propulsion efficiency. I can also provide comparative assessments for different propulsion configurations to identify the most efficient solution for your vessel. I am committed to delivering technically accurate calculations, clear engineering reports, and practical recommendations within the agreed timeline. My experience with marine engineering tools and performance evaluation enables me to provide reliable and industry-standard results tailored to your project requirements.

@engrhasan01

Are you looking for a naval/hydrodynamics engineer to develop a fully traceable resistance and propulsion analysis for your catamaran so you can confidently finalize engine selection and lock the lines plan? I’m a Mechanical and FEA Design Engineer with experience in resistance prediction, propulsion sizing, and performance modelling using both empirical methods and numerical tools for small craft and multihull systems. Scope I Can Support Calm-water total resistance estimation across full speed range Breakdown into frictional, residual, appendage, and air resistance components Propulsion power requirement calculation (shaft + effective power) Hotel load + service margin integration Sensitivity analysis of key hull parameters Method transparency using industry-standard approaches (e.g. Holtrop-Mennen / Savitsky / empirical multihull corrections) Deliverables Full calculation workbook or script (Excel/Python/MATLAB) Resistance breakdown vs speed curves Propulsive power curve (including 10% sea margin) Technical report (PDF/DOC) with methodology and assumptions One-page summary table for design report inclusion Best regards, Hasan A.

@carlosd178

Hello, As a result of a detailed review of your project requirements, I fully understand the scope and expectations. I have experience handling engineering calculation models, resistance/power estimation workflows, and traceable technical documentation, and I'm available to start your project right now. I bring strong expertise in Python, Excel, MATLAB, Mechanical Engineering, Hydrodynamic Calculations, and Technical Documentation. One of the key challenges here is producing resistance and propulsion figures that are not only accurate, but fully reproducible and clear enough for design-review use. I can prepare a calculation file breaking down frictional, residual, air, appendage, and correlation resistance, calibrate assumptions against your speed/RPM data, include hotel load and 10% sea margin, and summarize the power curve in a concise technical note. I have a couple of quick questions. • Do you prefer the calculation model in Excel, Python, or MATLAB for easier reruns on your side? • Do you already have propeller/gearbox assumptions, or should I estimate delivered power using standard propulsive efficiency ranges? I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Best regards, Carlos.

@jaroslavcaprata

Hi, there. I have 8+ years of experience building Shopify platforms, AI-assisted systems, WhatsApp automation workflows, and scalable e-commerce solutions. I have completed 20+ projects involving AI chat systems, multilingual customer workflows, CRM integrations, product recommendation engines, and mobile-first commerce platforms. For your Morbeez platform, I would follow a practical MVP-first approach using Shopify as the core commerce layer combined with scalable AI and WhatsApp integrations to avoid unnecessary custom complexity. The website will include a premium responsive frontend, SEO-optimized structure, crop-wise product organization, advanced filtering, multilingual support, and easy backend management for products, blogs, campaigns, and farmer interactions. The AI Crop Doctor workflow can support image uploads, symptom analysis, voice notes, product recommendations, and WhatsApp-based diagnosis using reliable AI APIs and automation services with future scalability for advanced models later. I also have experience building WhatsApp commerce workflows including automated replies, payment links, COD flows, telecaller lead routing, abandoned cart recovery, and customer follow-up automation. The architecture will remain flexible for future expansion into dealer systems, advanced analytics, voice AI, weather integrations, and multilingual scaling without rebuilding the platform. Thank you, Jaroslav Caprata

@jay8mac

Lets chat, a free consultation and no obligation. I understand you need a clean, professional, and user-friendly solution for your "Catamaran Resistance and Propulsion Calculations" project. My skills in PHP, Java, JavaScript are a perfect fit for this project. While I am new to freelancer.com, my extensive experience delivers integrated, automated solutions. Regards, Jason McLachlan

@ivicab6

Hi, I’ve worked extensively on hydrodynamic simulations and propulsion calculations for various marine projects, including breaking down resistance into frictional, residual, air, and appendage components. With the data you have, we can jump right into calculating the total calm-water resistance and sizing the required propulsion power. If you’d like, we can start with a small test case to ensure we align before moving to the full scope. Best Regards, Ivica

@RavenDetector

Hello, I am Everett, an experienced marine engineer specializing in hydrodynamic analysis and propulsion calculations. I understand you need precise calm-water resistance and propulsion power estimates for your catamaran before finalizing the design and engine choice. Calculating resistance components and power requirements with clear assumptions and calibration will provide you with the trustworthy data you need to proceed confidently. I will implement established empirical methods like Holtrop-Mennen combined with calibrated corrections, or apply CFD tools such as OpenFOAM if needed, to break down frictional, residual, air, appendage, and allowance components accurately. The deliverables will include a transparent calculation script, a concise technical report summarizing methodology and curves, and a clean summary table, all fully documented for clarity and reproducibility. I can communicate in real time in your time zone and provide an initial calculation framework within 12 hours of starting. Q1: Do you prefer CFD-based results or empirical methods for this project? Q2: Are there specific formats or units you require for the calculation file? Q3: Would you like me to include sensitivity analyses on hull parameters as part of the report? Which specific propulsion system characteristics should be prioritized after resistance calculations for optimal engine selection? Best regards, Everett

@serviceaxisgroup

Hi, I can help with a complete resistance curve and propulsion power estimate (including 10% sea margin) for your catamaran across the operating speed range. I’ll start by building a Python/Excel calculation workflow that ingests your LOA/beam/Cp/prismatic distribution and your speed–RPM tank-test data, then computes frictional, residual, air, appendage, and correlation allowance with documented coefficients and assumptions. To reduce risk, I’ll calibrate methods against your tank-test points and include rerunnable inputs so your results reproduce within ±3%. Do you prefer a specific empirical route (Holtrop-Mennen/Savitsky/Michlet) or should I use CFD-based coefficients only where supported? Also, what appendage areas/dimensions (and number) should I assume? Once you confirm, I’ll share the calculation file structure for quick review.