JUPITER C / JUNO I Explorer 1 Launch
- Weight (in pounds) Loaded Empty
- Overall (takeoff) 64,000 10,260
- Stage 1 62,700 9,600
- Stage 2 1,020 490
- Stage 3 280 140
- Stage 1 80 31.5
Propulsion Jupiter C Rocket
Stage 1: Rocketdyne A-7 engine. Thrust, 83,000 lb; burning time, 155 seconds; specific impulse, 235 seconds; propellants, liquid oxygen, as oxidizer, and "Hydyne" (60% unsymmetrical, dimethylhydrazine and 40% diethylenetriamine), as fuel; propellant feed, turbopump type; turbopump drive, 90% hydrogen peroxide decomposed by catalyst bed to produce steam.Stage 2: Eleven JPL scaled-down Sergeant rockets. Thrust, 16,500 lb; burning time, 6.5 seconds; specific impulse, 220 lb-sec/lb; propellant, polysulfide-aluminum and ammonium perchlorate (solid propellant).
Stage 3: Three JPL scaled-down Sergeant rockets. Thrust, 5,400 lb; burning time, 6.5 seconds; specific impulse, 235 lb-sec/lb; propellant, same as for Stage 2.
Stage 4: One JPL scaled-down Sergeant rocket. Thrust, 5,400 lb; burning time, 6.5 seconds; specific impulse, 235 lb-sec/lb; propellant, same as for Stage 2.
