added j2

src/data/allEngines.ts

@@ -1,6 +1,7 @@
 import type Engine from '../types/Engine';
 import BE4 from './engines/BE4';
 import F1 from './engines/F1';
+import J2 from './engines/J2';
 import MERLIN from './engines/MERLIN';
 import RAPTOR from './engines/RAPTOR';
 import RD180 from './engines/RD180';
@@ -25,7 +26,8 @@ export const getAllEngines = (): Engine[] => {
 		MERLIN,
 		RUTHERFORD,
 		VULCAIN,
-		VIKING
+		VIKING,
+		J2
 	];
 
 	all.sort((a, b) => a.stats.name.localeCompare(b.stats.name));

src/data/engines/J2.ts

@@ -0,0 +1,37 @@
+import Engine from '../../types/Engine';
+import type EngineStats from '../../types/EngineStats';
+import { Propellant } from '../../types/state/Propellant';
+import { Weight } from '../../types/units/Weight';
+import { ISP } from '../../types/units/ISP';
+import { Size } from '../../types/units/Size';
+import Country from '../../types/state/Country';
+import Status from '../../types/state/Status';
+import EngineCycle from '../../types/state/EngineCycle';
+import Rocket from '../../types/state/Rocket';
+
+/**
+ * The j-2 rocket engine.
+ * @author cophilot
+ * @date 2025-1-19
+ */
+const J2: EngineStats = {
+	name: 'J-2',
+	url: 'https://en.wikipedia.org/wiki/Rocketdyne_J-2',
+	imageUrl:
+		'https://lh3.googleusercontent.com/proxy/Lfj3lErPJKINWSYisxgnafg3LVHKLH4bz2MNS3rzDH_b8nFT7MaQt18OJasu2Nt6UcTYvQW-Hy-K5pX6Xui6euAvicj1iWZEhlZL7oIM4-STSvuzWPkcBRwDNxYLxqBj',
+	schemanticUrl:
+		'https://upload.wikimedia.org/wikipedia/commons/thumb/2/29/J-2_engine_schematic.png/400px-J-2_engine_schematic.png',
+	country: Country.USA,
+	status: Status.RETIRED,
+	firstFlight: '1966',
+	rockets: [Rocket.SATURN_IB, Rocket.SATURN_V],
+	propellant: Propellant.HYDRO_LOX,
+	cycle: EngineCycle.GAS_GENERATOR,
+	specificImpulseSeaLevel: new ISP(200),
+	specificImpulseVacuum: new ISP(421),
+	height: new Size(3.4),
+	diameter: new Size(2.1),
+	massDry: new Weight(1788)
+};
+
+export default new Engine(J2);

src/types/state/Rocket.ts

@@ -3,6 +3,7 @@ import State from './State';
 export default class Rocket extends State {
 	public static readonly SATURN_V: State = new State('Saturn V');
 	public static readonly SATURN_I: State = new State('Saturn I');
+	public static readonly SATURN_IB: State = new State('Saturn IB');
 	public static readonly ATLAS_III: State = new State('Atlas III');
 	public static readonly ATLAS_V: State = new State('Atlas V');
 	public static readonly SLS: State = new State('SLS');