Juno I

Juno I
Juno I awaiting launch with Explorer I
FunctionOrbital launch vehicle
ManufacturerChrysler for the ABMA
Country of originUnited States
Size
Height21.2 m (70 ft)
Diameter1.78 m (5 ft 10 in)
Mass29,060 kg (64,070 lb)
Stages4
Capacity
Payload to LEO
Mass11 kg (24 lb)
Launch history
StatusRetired
Launch sitesLC-5 and 26A,
Cape Canaveral Missile Annex, Florida
Total launches6
Success(es)3
Failure(s)3
First flight1 February 1958,
03:47:56 GMT
Last flightOctober 23, 1959
First stage – Redstone (stretched)
Powered by1 Rocketdyne A-7
Maximum thrust42,439 kgf (416.18 kN; 93,560 lbf)
Specific impulse235 s (2.30 km/s)
Burn time155 seconds
PropellantHydyne/LOX
Second stage – Baby Sergeant cluster
Powered by11 Solid[1]
Maximum thrust7,480 kgf (73.4 kN; 16,500 lbf)
Specific impulse220 s (2.2 km/s)
Burn time6 seconds
PropellantPolysulfide-aluminum and ammonium perchlorate (Solid)
Third stage – Baby Sergeant cluster
Powered by3 Solid
Maximum thrust2,040 kgf (20.0 kN; 4,500 lbf)
Specific impulse236 s (2.31 km/s)
Burn time6 seconds
PropellantPolysulfide-aluminum and ammonium perchlorate (Solid)
Fourth stage – Baby Sergeant
Powered by1 Solid
Maximum thrust680 kgf (6.7 kN; 1,500 lbf)
Specific impulse249 s (2.44 km/s)
Burn time6 seconds
PropellantPolysulfide-aluminum and ammonium perchlorate (Solid)

The Juno I was a four-stage American space launch vehicle, used to launch lightweight payloads into low Earth orbit. The launch vehicle was used between January 1958 to December 1959. The launch vehicle is a member of the Redstone launch vehicle family, and was derived from the Jupiter-C sounding rocket. It is commonly confused with the Juno II launch vehicle, which was derived from the PGM-19 Jupiter medium-range ballistic missile. In 1958, a Juno I launch vehicle was used to launch America's first satellite, Explorer 1.

  1. ^ Cite error: The named reference Boehm-NASA was invoked but never defined (see the help page).