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Propeller Thrust Coefficient KT

Contents

Live calculator

Non-dimensional thrust KT = T / (ρ·n²·D⁴). The vertical-axis quantity read from open-water propeller charts.

Formula

$$ K_T = \frac{T}{\rho \cdot n^2 \cdot D^4} $$

Symbol legend

SymbolMeaningUnitSource
$T$ThrustN (input as kN)propeller trial / thrust meter
$ρ$Sea-water densitykg/m³1025
$n$Shaft revolutions per secondrev/srpm/60
$D$Propeller diametermdrawing
$KT$Thrust coefficient-result

Sources

  • Carlton - Marine Propellers and Propulsion.