Nomoto T - Turning Time Constant
Nomoto first-order time constant T from the yaw-rate rise-to-steady time - measures how quickly the ship responds to rudder.
T (first-order time constant)
38.0s
Formula, assumptions, and limits
$$T = t_{63\%}$$
Merchant ships T = 10–50 s depending on size and speed. Combines with K for first-order linear Nomoto model: T·ψ̈ + ψ̇ = K·δ.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $t_{63\%}$ | Time to reach 63 % of steady yaw rate | s | zig-zag test |
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