Imperial units (#645)

* Adding BTU/lb·°F for SpecificEntropy

* Adding reyn, lbf·s/in², and lbf·s/ft² to DynamicViscosity

* Adding S/in and S/ft to ElectricConductivity

Author: tmilnthorp

Common/UnitDefinitions/DynamicViscosity.json

@@ -46,6 +46,42 @@
           "Abbreviations": [ "P" ]
         }
       ]
+    },
+    {
+      "SingularName": "Reyn",
+      "PluralName": "Reyns",
+      "FromUnitToBaseFunc": "x * 6.8947572931683613e3",
+      "FromBaseToUnitFunc": "x / 6.8947572931683613e3",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "reyn" ]
+        }
+      ]
+    },
+    {
+      "SingularName": "PoundForceSecondPerSquareInch",
+      "PluralName": "PoundsForceSecondPerSquareInch",
+      "FromUnitToBaseFunc": "x * 6.8947572931683613e3",
+      "FromBaseToUnitFunc": "x / 6.8947572931683613e3",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "lbf·s/in²" ]
+        }
+      ]
+    },
+    {
+      "SingularName": "PoundForceSecondPerSquareFoot",
+      "PluralName": "PoundsForceSecondPerSquareFoot",
+      "FromUnitToBaseFunc": "x * 4.7880258980335843e1",
+      "FromBaseToUnitFunc": "x / 4.7880258980335843e1",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "lbf·s/ft²" ]
+        }
+      ]
     }
   ]
 }

Common/UnitDefinitions/ElectricConductivity.json

@@ -13,6 +13,12 @@
     {
       "SingularName": "SiemensPerMeter",
       "PluralName": "SiemensPerMeter",
+      "BaseUnits": {
+        "L": "Meter",
+        "M": "Kilogram",
+        "T": "Second",
+        "I": "Ampere"
+      },
       "FromUnitToBaseFunc": "x",
       "FromBaseToUnitFunc": "x",
       "Localization": [
@@ -21,6 +27,30 @@
           "Abbreviations": [ "S/m" ]
         }
       ]
+    },
+    {
+      "SingularName": "SiemensPerInch",
+      "PluralName": "SiemensPerInch",
+      "FromUnitToBaseFunc": "x * 3.937007874015748e1",
+      "FromBaseToUnitFunc": "x / 3.937007874015748e1",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "S/in" ]
+        }
+      ]
+    },
+    {
+      "SingularName": "SiemensPerFoot",
+      "PluralName": "SiemensPerFoot",
+      "FromUnitToBaseFunc": "x * 3.2808398950131234",
+      "FromBaseToUnitFunc": "x / 3.2808398950131234",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "S/ft" ]
+        }
+      ]
     }
   ]
 }

Common/UnitDefinitions/SpecificEntropy.json

@@ -46,6 +46,18 @@
           "Abbreviations": [ "cal/g.K" ]
         }
       ]
+    },
+    {
+      "SingularName": "BtuPerPoundFahrenheit",
+      "PluralName": "BtusPerPoundFahrenheit",
+      "FromUnitToBaseFunc": "x * 4.1868e3",
+      "FromBaseToUnitFunc": "x / 4.1868e3",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "BTU/lb·°F", "BTU/lbm·°F" ]
+        }
+      ]
     }
   ]
 }

UnitsNet.Tests/CustomCode/DynamicViscosityTests.cs

@@ -14,6 +14,9 @@ public class DynamicViscosityTests : DynamicViscosityTestsBase
         protected override double NewtonSecondsPerMeterSquaredInOneNewtonSecondPerMeterSquared => 1;
         protected override double PascalSecondsInOneNewtonSecondPerMeterSquared => 1;
         protected override double PoiseInOneNewtonSecondPerMeterSquared => 10;
+        protected override double ReynsInOneNewtonSecondPerMeterSquared => 1.4503773773020922e-4;
+        protected override double PoundsForceSecondPerSquareInchInOneNewtonSecondPerMeterSquared => 1.4503773773020922e-4;
+        protected override double PoundsForceSecondPerSquareFootInOneNewtonSecondPerMeterSquared => 2.0885434233150127e-2;
 
         [Fact]
         public static void DynamicViscosityDividedByDensityEqualsKinematicViscosity()

UnitsNet.Tests/CustomCode/ElectricConductivityTests.cs

@@ -28,5 +28,7 @@ namespace UnitsNet.Tests.CustomCode
     public class ElectricConductivityTests : ElectricConductivityTestsBase
     {
         protected override double SiemensPerMeterInOneSiemensPerMeter => 1;
+        protected override double SiemensPerInchInOneSiemensPerMeter => 2.54e-2;
+        protected override double SiemensPerFootInOneSiemensPerMeter => 3.048e-1;
     }
 }

UnitsNet.Tests/CustomCode/SpecificEntropyTests.cs

@@ -35,5 +35,6 @@ public class SpecificEntropyTests : SpecificEntropyTestsBase
         protected override double MegajoulesPerKilogramKelvinInOneJoulePerKilogramKelvin => 1e-6;
         protected override double CaloriesPerGramKelvinInOneJoulePerKilogramKelvin => 2.390057e-4;
         protected override double KilocaloriesPerGramKelvinInOneJoulePerKilogramKelvin => 2.390057e-7;
+        protected override double BtusPerPoundFahrenheitInOneJoulePerKilogramKelvin => 2.3884589662749594e-4;
     }
 }