Kalkulator Pitch & Slip Baling-baling ⚙️
Hitung persentase slip baling-baling dan risiko kavitasi. Masukkan pitch, diameter, RPM, dan rasio gigi.
Cara Menggunakan Kalkulator Baling-baling
Masukkan pitch baling-baling (inci), diameter, RPM mesin, rasio gigi, dan kecepatan GPS aktual.
Slip 5–15% adalah normal. Di atas 25% menunjukkan kemungkinan kotoran pada lambung atau kerusakan baling-baling.
Risiko kavitasi berdasarkan kecepatan ujung (π×D×RPM poros/12). Di bawah 9.000 ft/min aman.
FAQ
What is propeller slip and how is it calculated?
Propeller slip is the difference between theoretical speed (pitch × RPM / gear ratio / 1215.2) and actual GPS speed. Slip % = (theoretical − actual) / theoretical × 100. Normal recreational boats run 5–15% slip.
What causes high propeller slip?
High slip (> 25%) is caused by hull fouling, propeller damage, incorrect pitch for load, or heavy displacement. Clean hull regularly, inspect prop blades for nicks, and consider re-pitching.
What is cavitation and how does tip speed affect it?
Cavitation occurs when propeller tip speed creates low-pressure bubbles that implode on the blade surface, causing damage and loss of thrust. Tip speed = π × diameter × shaft RPM / 12. Below 9,000 ft/min is safe; above 14,000 ft/min is critical.
What is the ideal propeller slip for recreational boats?
5–15% slip is ideal for most recreational planing boats. Displacement hulls typically run 10–20%. Racing props can achieve 3–8%. Slip outside these ranges warrants inspection.