Automotive Engineering

Roll Stability Index (RSI) Calculator

Quantifies static rollover resistance using track width, center of gravity height, and suspension geometry

Quick Answer

The roll stability index (rsi) calculator computes roll stability index (rsi) from the input values you provide.

Calculator

Roll Stability Index (RSI) (dimensionless)
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Result Interpretation

The result shows Roll Stability Index (RSI) in dimensionless, computed directly from the entered inputs using the formula defined for this tool.

Worked Example

Verified calculation

Given:

  • track_width = 1.52
  • cg_height = 0.55

Expected Result:

  • rsi = 1.3818

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from verified test cases.

Formula / Method

RSI = track width / 2 / center of gravity height

Roll Stability Index (RSI).

Variables

SymbolLabelRoleDescription
track_width Track width INPUT Track width
cg_height Center of gravity height INPUT Center of gravity height
rsi Roll Stability Index (RSI) OUTPUT Roll Stability Index (RSI)

Calculation Steps

  1. Enter the track width in m.
  2. Enter the center of gravity height in m.
  3. Step 1: Compute roll stability index (rsi).
  4. Read the roll stability index (rsi) (dimensionless) from the results.

Frequently Asked Questions

What does this calculator calculate?

The Roll Stability Index (RSI) Calculator estimates Roll Stability Index (RSI) based on the input parameters you provide

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Track width (m), Center of gravity height (m). Make sure all inputs use the specified units for consistent results

How does Track width affect the results?

The track width directly affects: Roll Stability Index (RSI). Increasing or decreasing this value will change these output values according to the engineering formula

How should I interpret the calculated results?

The calculator provides the following outputs: roll stability index (rsi) in dimensionless. Results are computed from the input values using the defined calculation method. Always verify results against project-specific requirements and applicable standards

What assumptions does this calculator use?

This calculator uses verified engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

When is this calculation useful?

The Roll Stability Index (RSI) Calculator is useful during preliminary design, feasibility studies, and quick engineering checks in vehicle-dynamics projects. It helps engineers and designers estimate key parameters before proceeding with detailed analysis

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