Juno I (1958)
First Flight: 1958
Last Flight: 1958
Stages: 4
Total Mass: 29.06 tons
Payload Mass: 11 kg to LEO
Diameter: 1.78 m
Length: 21.2 m
First Stage
Type: Redstone (stretched) Core
Arrangement: 1 x Rocketdyne A-7
Thrust (kN): 370
Propellant: LOX/Hydyne
ISP: 235 s
ISP (sea level):
Burn Time: 155 s
Gross Mass: ?
Second Stage
Type: Core
Arrangement: 11 x MGM-29 Sergeant solid
Thrust (kN): 73
Propellant: polysulfide-aluminum and ammonium perchlorate
ISP: 214 s
ISP (sea level):
Burn Time: 6 s
Gross Mass: 0.462 tons
Empty Mass: 0.231 tons
Third Stage
Type: Core
Arrangement: 3 x MGM-29 Sergeant solid
Thrust (kN): 20
Propellant: polysulfide-aluminum and ammonium perchlorate
ISP: 214 s
ISP (sea level):
Burn Time: 6 s
Gross Mass: 0.126 tons
Empty Mass: 0.063 tons
Fourth Stage
Type: Core
Arrangement: 1 x MGM-29 Sergeant solid
Thrust (kN): 7
Propellant: polysulfide-aluminum and ammonium perchlorate
ISP: 214 s
ISP (sea level):
Burn Time: 6 s
Gross Mass: 0.042 tons
Empty Mass: 0.021 tons