Natural Period of Roll & Rolling Period Test — GM, Stability for Mates exam mmd скачать в хорошем качестве

Natural Period of Roll & Rolling Period Test — GM, Stability for Mates exam mmd

Natural Period of Roll & Rolling Period Test — GM, Stability & Exam Concepts Explained | Merchant Navy 📝 This video explains the *natural period of roll* and why it is one of the most important indicators of a ship’s stability. You’ll learn how the period of roll relates to GM, how the Rolling Period Test is carried out onboard, and how exam formulas are actually used in practice. 📘 What You’ll Learn • What “one complete roll” really means • Natural period of roll — definition & concept • Why TR depends on ship stability (GM & K) • Full formula: TR = 2πK / √(GM × g) • Meaning of radius of gyration (K ≈ 0.35 × B) • Why roll period does NOT depend on roll angle • How changing GM or cargo distribution changes TR • Rolling Period Test — step-by-step procedure • Empirical shortcut: GM = F × B / TR² • When and why the test is used on small ships • Limits, precautions, and common mistakes This lesson is explained clearly with examples — useful for exams as well as real onboard stability checks. 🌐 Connect with Sailor Rider YouTube:    / @sailor_rider   Facebook:   / 19imzynlrp   Instagram: https://instagram.com/sailor_rider?ig... Threads: https://www.threads.com/@sailor_rider 🏷 Tags natural period of roll explained rolling period test gm ship stability roll formula tr formula radius of gyration metacentric height and roll gm from rolling period ship stability for exams merchant navy stability lesson rolling test procedure onboard limitations of rolling period test stability calculation tutorial deck officer stability training #️⃣ #ShipStability #MerchantNavy #NavalArchitecture #DeckOfficer #MarineEducation