1960-U01
The next E-2A type probe was given an improved radio system and redesignated called E-3; it replaced a proposed E-2F mission which would have had a Yenisey-3 camera. They were intended as Luna-3-like photographic circumlunar flights. They had a simpler design, using the E-2A pressure container but with a single 750mm focal length camera. The first E-3 probe was launched on 1960 Apr 15. The Blok-E stage cut off too early and E-3 No. 1 carried out a high apogee suborbital flight, velocity 110 m/s (or 130 m/s) too low. This was the first failure of the Blok-E.
| E-3 No. 1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1960 Apr 15 | 1506:45 | Launch by 8K72 L1-9 | KB |
| 1518:51 | Blok-E cutoff 3s early T+726s | ||
| 1960 Apr 16 | 0930? | Pass EL1:4 | |
| 1960 Apr 17 | 1500? | Apogee 200000 km | |
| 1960 Apr 19 | 1500? | Reentry | |
Payload:
- Yenisey-2 photo-TV unit
- Camera with 750 mm focal length
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