Pervane Adımı ve Kayma Hesaplayıcısı ⚙️
Pervane kayma yüzdesini ve kavitasyon riskini hesaplayın. Adım, çap, RPM ve dişli oranını girin.
Pervane Hesaplayıcısı Nasıl Kullanılır
Pervane adımını (inç), çapı, motor RPM'ini, dişli oranını ve GPS gerçek hızını girin.
%5–15 kayma normaldir. %25 üzeri gövde kirliliği veya pervane hasarına işaret edebilir.
Kavitasyon riski kanat ucu hızına (π×D×Mil RPM/12) göre belirlenir. 9.000 ft/dak altı güvenlidir.
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.