Effective Power (P_E)

P_E = R_T · V_s (resistance × ship speed through water). Export PNG/PDF.

P_E: — kW (— hp)

Inputs used: R_T=— kN, V_s=— kn (— m/s)

Effective Power excludes margins & efficiency factors. To get Delivered/Brake Power: P_D=P_E/η_H, P_B=P_E/(η_H·η_R·η₀).

Report: Effective Power (P_E)

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Notes

Formula: \( P_E = R_T \cdot V_s \). Use speed through water for V_s.

Units: kN × m/s → kW. 1 kn = 0.514444 m/s. 1 hp ≈ 0.7457 kW.

P_E is often derived from resistance models (e.g., Holtrop) or trials; apply sea margins and efficiencies separately.

Effective Power (PE)