Propeller Roughness • Fuel Recovery • Performance Decay • Polishing Cost • Off-Hire • CO₂ Avoided • Payback • NPV • IRR
Propeller Polishing ROI & Fuel Savings Calculator
Turn measured propeller-performance loss into a maintenance decision. Estimate immediate and cycle-average propulsion-fuel recovery, bunker savings, polishing and off-hire cost, CO₂ reduction, payback, NPV and IRR. Advanced mode adds roughness/fouling return, recurring polishing cycles, inspection and underwater-work costs, carbon value, surface-risk allowance and stress testing.
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Need performance decay, recurring polishing cycles, inspection/underwater-work cost, carbon value or surface-repair allowance? Click Advanced above.Simple treats one polishing event and uses the entered smooth-propeller reference plus recovery percentage.PerformanceRecovered propulsion fuel
EconomicsPayback, NPV & IRR
ThresholdBreak-even polishing recovery
Propeller Performance Baseline
t/day at the operating condition being screened.
t/day propulsion fuel at comparable draft, speed, weather and RPM/power condition.
% of the measured propeller-related fuel penalty expected to be recovered.
days.
currency/day.
years. Simple assumes the recovered savings persist for this screening horizon.
%.
Measured Propeller Performance & Operating Profile
Use weather-normalized vessel data where possible. The tool does not assign a universal fuel-saving percentage to a propeller condition.
Linear planning model for loss of fresh-polish benefit.
months between repeat polishing cycles.
tCO₂/t fuel, editable planning factor.
% of avoided CO₂ economically valued.
Polishing Event & Compliance Cost
Owner planning allowance for blade-edge, surface or coating follow-up; not a predicted repair cost.
Investment Horizon & Stress Cases
Stress the actual decision drivers. Each row recalculates NPV, payback and first-year savings.
| Case | Fuel price Δ% | Recovery Δ pts | Performance decay months Δ% | Polishing cost Δ% |
|---|
Propeller Polishing Readiness
Engineering / commercial screen: Use weather-normalized vessel performance where possible. Propeller roughness/fouling, cavitation damage, draft, trim, sea state, speed and engine loading all influence observed fuel burn. Advanced performance decay is a user-entered linear planning model, not a biological prediction. Confirm local in-water-polishing restrictions, local underwater-work requirements and coating-maker limitations before scheduling work.