Trajectories

src/engine/knowledgebaseData.js

@@ -496,7 +496,7 @@ export const COMBINATIONS = [
     flameTemp: 3250,
     optimalOF: 6.0,
     gamma: 1.21,
-    R: 934,
+    R: 760,
     chamberPressureRef: '6.9 MPa',
     expansionRatioRef: 40,
     energeticCategory: 'Cryogenic Bipropellant',
@@ -800,7 +800,7 @@ export const ABLATIVE_MATERIALS = [
     erosionRateRange: [0.05, 0.20],
     maxTemp: 3600,
     density: 1450,
-    thermalConductivity: 8.0,
+    thermalConductivity: 3.5,
     charYield: 0.58,
     pressureExponent: 0.33,
     applications: ['nozzle throat (high heat flux)', 'combustion chamber'],
@@ -815,13 +815,13 @@ export const ABLATIVE_MATERIALS = [
       'EPDM is a flexible elastomeric ablator suitable for low-pressure engines and non-critical applications. It provides good insulation properties and flexibility, reducing structural loads. Inexpensive and easy to manufacture in various geometries.',
     erosionRate: 0.50,
     erosionRateRange: [0.30, 0.80],
-    maxTemp: 2200,
+    maxTemp: 700,
     density: 920,
     thermalConductivity: 0.25,
     charYield: 0.40,
     pressureExponent: 0.50,
     applications: ['low-pressure chamber', 'insulation layer'],
-    notes: 'Low cost and simple manufacturing. Limited to low-pressure (<1 MPa) applications due to high erosion rates.',
+    notes: 'Low cost and simple manufacturing. Limited to low-pressure (<1 MPa) applications due to high erosion rates. Virgin material decomposes above ~700 K.',
     refPressure: 0.5e6,
   },
   {
@@ -867,8 +867,8 @@ export const ABLATIVE_MATERIALS = [
     erosionRate: 0.06,
     erosionRateRange: [0.03, 0.12],
     maxTemp: 3800,
-    density: 1500,
-    thermalConductivity: 5.5,
+    density: 270,
+    thermalConductivity: 0.25,
     charYield: 0.60,
     pressureExponent: 0.30,
     applications: ['nozzle throat (ultra-high performance)', 'chamber (extreme conditions)'],
@@ -884,5 +884,5 @@ export const STRUCTURAL_MATERIALS = [
   { id: 'ss_304',       name: 'Stainless Steel 304', yieldStrength: 215e6, density: 7900, youngModulus: 193e9 },
   { id: 'inconel_718',  name: 'Inconel 718', yieldStrength: 1100e6, density: 8190, youngModulus: 200e9 },
   { id: 'ti_6al_4v',    name: 'Titanium Ti-6Al-4V', yieldStrength: 880e6, density: 4430, youngModulus: 114e9 },
-  { id: 'cfrp',         name: 'CFRP (typical)', yieldStrength: 600e6, density: 1600, youngModulus: 70e9 },
+  { id: 'cfrp',         name: 'CFRP (typical)', yieldStrength: 450e6, density: 1600, youngModulus: 70e9 },
 ]