Juno I

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Juno I

Juno I awaiting launch with Explorer I
Function	Orbital launch vehicle
Manufacturer	Chrysler for the ABMA
Country of origin	United States
Size
Height	21.2 m (70 ft)
Diameter	1.78 m (5 ft 10 in)
Mass	29,060 kg (64,070 lb)
Stages	4
Capacity
Payload to LEO
Mass	11 kg (24 lb)
Launch history
Status	Retired
Launch sites	LC-5 and 26A, Cape Canaveral Missile Annex, Florida
Total launches	6
Success(es)	3
Failure(s)	3
First flight	1 February 1958, 03:47:56 GMT
Last flight	October 23, 1959
First stage – Redstone (stretched)
Powered by	1 Rocketdyne A-7
Maximum thrust	42,439 kgf (416.18 kN; 93,560 lbf)
Specific impulse	235 s (2.30 km/s)
Burn time	155 seconds
Propellant	Hydyne/LOX
Second stage – Baby Sergeant cluster
Powered by	11 Solid[1]
Maximum thrust	7,480 kgf (73.4 kN; 16,500 lbf)
Specific impulse	220 s (2.2 km/s)
Burn time	6 seconds
Propellant	Polysulfide-aluminum and ammonium perchlorate (Solid)
Third stage – Baby Sergeant cluster
Powered by	3 Solid
Maximum thrust	2,040 kgf (20.0 kN; 4,500 lbf)
Specific impulse	236 s (2.31 km/s)
Burn time	6 seconds
Propellant	Polysulfide-aluminum and ammonium perchlorate (Solid)
Fourth stage – Baby Sergeant
Powered by	1 Solid
Maximum thrust	680 kgf (6.7 kN; 1,500 lbf)
Specific impulse	249 s (2.44 km/s)
Burn time	6 seconds
Propellant	Polysulfide-aluminum and ammonium perchlorate (Solid)
[edit on Wikidata]

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.