Juno II
The Juno II rocket emerged PGM -19 Jupiter from the medium-range missile. This formed the basic level of Juno II and had been extended to this purpose by 0.91 m. The powerplant was a gimbaled Rocketdyne S- 3D is used, which only slightly modified in the Thor came into use later. In the first stage, two or three solid upper stages that are already found I use in the Juno were. These were after burning the first stage (182 s after the start ) ignited by the control center via radio pulse, which led by radio interference to the loss of Explorer S -46. The variant with only two upper stages was used only once to the unsuccessful launch of the Beacon -2 satellite.
The Juno II was launched in the years 1958 to 1961 exclusively from Cape Canaveral. Of a total of ten starts, only four were successful.
Missiles of this type transported two Pioneer lunar probes ( a false start due to premature firing circuit of the first stage ), seven Explorer satellites ( four false starts ) and a beacon satellite ( false start ).
The Juno II could carry 41 kg to low Earth orbit or 6 kg an interplanetary orbit. Due to their low power of this missile type has not been any further development.
Specifications
Start list
This is a complete start list of Juno II rocket.
¹ Gross Weight = ( Satellite Adapter, enclosure etc. )
² NOT necessarily the target orbit of the payload - but the path to the payload of the advanced level should be suspended.