Encyclopedia Astronautica
1967.01.01 - N1 development progress

The KORD system detected and controlled the parameters of 42 engines (30 first stage + 8 second stage + 4 third stage) This involved processing 1600 data elements.

The sensors were based on designs developed in 1962-1963. The N1 was designed with a 25% thrust reserve -- two pairs of engines could be shut down by KORD at lift-off if necessary, and the booster would still fly its mission. The KORD system used 15 V 1000 Hz power. Korolev and his closes associates would sit at Korolev's home in evening, and mainly discuss movies, the N-1's engines, and KORD.

Electric power for the launch vehicle was provided by a 3 phase / 60 V / 1000 Hz turbogenerator. It could be operated using any of the compress available on the N1 - air, nitrogen, or helium. Lyulka developed the ATG - automatic turbogenerators - for the N1 beginning in 1962. There were two on each launch vehicle: one in the block A first stage, and one in the Block V third stage. VNIIEM and the Saturn bureau ran 22 of these ATG's on air for 3000 hours, and 17 for 1000 hours - versus the design requirement of 12 minutes. These units were considered of the highest reliability.

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