Description
Multiply nonnegative thrust by deductionFraction in [0, 1] for deduction and subtract it for effectiveThrust.
Marine speed, thrust, and propeller ratios depend on a declared reference frame and coherent units. A scalar term usually describes only one part of vessel performance.
Multiply nonnegative thrust by deductionFraction in [0, 1] for deduction and subtract it for effectiveThrust.
When to use this tool
Use Thrust Deduction Effective Force Term when you need one explicit marine performance ratio or residual.
How to use the tool and how it works
- Enter thrust, deductionFraction. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read effectiveThrust, deduction. Use the output convention below.
Multiply nonnegative thrust by deductionFraction in [0, 1] for deduction and subtract it for effectiveThrust.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| thrust | Thrust | Required. Finite number; minimum 0. |
| deductionFraction | Deduction Fraction | Required. Finite number; minimum 0; maximum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| effectiveThrust | Effective Thrust | Required. Finite number. |
| deduction | Deduction | Required. Finite number. |
{
"input": {
"thrust": 1000,
"deductionFraction": 0.2
},
"output": {
"effectiveThrust": 800,
"deduction": 200
}
}Limitations and assumptions
- The fraction is supplied; hull interaction and operating-condition dependence are not estimated.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use measured operating data and a vessel-specific propulsion model for performance predictions.
References
Similar or alternative tools
- Nautical Speed Over Water Ground Gap
Subtract nonnegative waterSpeed from nonnegative groundSpeed.
- Nautical Time Distance Residual
Multiply nonnegative speedKnots by elapsedHours for modelNauticalMiles.