Propulsion Nozzle Design: conical
conical er60 g125 to conical er8 g130
De Laval (converging-diverging) rocket nozzle design parameters — expansion ratio (Ae/At), exit Mach number, pressure ratio (pe/pc), vacuum and optimum thrust coefficient (CF), discharge coefficient (Cd), divergence efficiency (lambda), and Isp correction factor by nozzle type (conical 15-deg, bell 80%, bell optimum/Rao, plug/aerospike, dual-bell) and gamma (1.20/1.25/1.30). Isentropic relations per Sutton & Biblarz RPE 9th Ed; nozzle efficiency corrections per NASA SP-8120.
| nozzle type | record id | Isp correction factor (dimensionless) | discharge coeff cd (dimensionless) | divergence efficiency lambda (dimensionless) | exit mach (dimensionless) | expansion ratio (dimensionless) | gamma ref (dimensionless) | half angle deg (deg) | pressure ratio pe pc (dimensionless) | thrust coeff cf opt (dimensionless) | thrust coeff cf vac (dimensionless) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| conical | conical er60 g125 | 0.975 | 0.99 | 0.983 | 4.006 | 60 | 1.25 | 15 | 0.00408 | 1.434 | 1.908 |
| conical | conical er60 g130 | 0.975 | 0.99 | 0.983 | 4.232 | 60 | 1.3 | 15 | 0.0035 | 1.368 | 1.855 |
| conical | conical er8 g120 | 0.975 | 0.99 | 0.983 | 2.343 | 8 | 1.2 | 15 | 0.07241 | 1.391 | 1.885 |
| conical | conical er8 g125 | 0.975 | 0.99 | 0.983 | 2.387 | 8 | 1.25 | 15 | 0.06801 | 1.359 | 1.854 |
| conical | conical er8 g130 | 0.975 | 0.99 | 0.983 | 2.43 | 8 | 1.3 | 15 | 0.06401 | 1.337 | 1.826 |
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators