# Squid Lubricity Rating

## Contents

# Introduction

# Scoring

Currently our rating system works on a scale of 0-100 and is based on time-aggregated data from up to 5 categories: Scar Size, Operating Temperature, Required Power, Maximum Running Load, and Maximum Starting Load.

The equation for all scoring works as follows:

Where:

*P*= Points*i*= "Ideal" result*c*= Category*R*= Scalar- and 100 is the point offset (a maximum of 100 points available)

The 5 categories have a different scalar (*R*) to determine their scoring curve.

*R_c* values are:

- Scar Size = 1.5
- Operating Temperature = 0.01
- Required Power = 0.2
- Maximum Running Load = 0.08
- Maximum Starting Load = 0.25

*i_c* values are:

- Scar Size = 1.0 mm (all scores below 1.0 mm receive 100 pts.)
- Operating Temperature = 260' F
- Required Power = 25 W (all scores below 20 W receive 100 pts.)
- Maximum Running Load = 8,333 kg/cm^2; 120,000 psi (all scores above 120,000 psi receive 100 pts.)
- Maximum Starting Load = 1,406 kg/cm^2; 20,000 psi (all scores above 20,000 psi receive 100 pts.)

*Why Pounds per Square Inch (psi) when other measurements are metric?* Similarly to Fahrenheit, psi has more convenient scaling for our uses than kg/cm^2 (kilograms per square centimeter). Numbers will be offered in both formats as often as possible.

The final point score is calculated using the following equation:

Where:

*P*= Points*W*= Weighting value*c*= Category*n*= Variation number*t*= Total*a*= refers to the category number. SLR-3 having 4 total scoring categories.

## SLR-2

SLR-2 has been replaced by SLR-3.

SLR-2 used 3 categories for scoring: Scar Size, Operating Temperature, and Required Power.

The weighting values for SLR-2 are:

- Scar Size = 1.2
- Operating Temperature = 1.0
- Required Power = .8

## SLR-3

In SRL-3, the weighting values are:

- Scar Size = 1.2
- Operating Temperature = 1.2
- Required Power = .9
- Maximum Running Load = .8

## SLR-4

In SRL-4, the weighting values are:

- Scar Size = 1.2
- Operating Temperature = 1.2
- Required Power = .9
- Maximum Running Load = .8
- Maximum Starting Load = 1.1