Steering-Gear Hydraulic Torque

Required hydraulic torque on the rudder stock to satisfy the SOLAS II-1 Reg 29 duty: full rudder 35°→35° in ≤ 28 s at service speed.

HydraulicsSteering

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

T = F \cdot r, \quad P = T \cdot \dot\theta, \quad \dot\theta = \tfrac{70}{t_\text{28}}

Symbol	Meaning	Unit
$F$	Peak side force on rudder	kN
$r$	Moment arm to stock centreline	m
$T$	Stock torque	kN·m
$\dot\theta$	Angular rate (70°/t_28)	°/s

Source: SOLAS II-1 Reg 29; DNV-ST-0285 - Steering gear

In short

Required hydraulic torque on the rudder stock to satisfy the SOLAS II-1 Reg 29 duty: full rudder 35\u00b0\u219235\u00b0 in \u2264 28 s at service speed.

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