Credit: © Mark Wade. 23,457 bytes. 333 x 296 pixels.
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| Proton 1 / N-4 - Credit: © Mark Wade. 23,457 bytes. 333 x 296 pixels. |
Physics experiments. Space station "Proton 1". Investigation of ultra-high-energy cosmic particles. Actual mass was 8,300 kg - but that announced at time of launch was 12,200 kg (designed payload capacity of three-stage version of original Proton launch vehicle that never flew).
Total Mass: 8,300 kg. Total Payload: 3,500 kg.
The first launch of the Proton launch vehicle was not without problems. A leak in the oxidiser pipeline resulted in nitrogen tetroxide spilling on electrical wires. The question was: proceed with the launch or abort? Chelomei decided to go ahead, and on 16 July 1965 the first UR-500 successfully launched the Proton 1 satellite. In the first hours after launch specialists from OKB-52 could only receive signals in the first hours that indicated the satellite was �alive�. However it later functioned normally and provided physics data on ultra-high-energy cosmic particles for 45 days.
At the first launch the rocket was called �Gerkules� (other sources say �Atlantis�), as indicated by the large symbol on the second stage skin. This name was however was not taken up.
High energy physics laboratory. Investigation of ultra-high-energy cosmic particles.
 | N-4 Spacecraft - Cutaway view of N-4 spacecraft. This heavy high-energy physics station was launched on the first four test launches of the Proton launch vehicle. Credit: Chelomei School, Leninsk. 30,376 bytes. 525 x 345 pixels. |