Bushuyev proposed a two launch variation on Korolev's single-launch scheme. The increased-payload version of the N1 with six additional engines was not planned to fly until vehicle 3L. 1L and 2L were to be technology articles for ground test with only the original 24 engine configuration. At that time the first Apollo test flight was planned by the end of 1966, and the US moon landing no later than 1969. The Soviets expected the first test of their LK lander in 1969, and concluded they could not expect to land a Soviet man on the moon until 1972.
At the same time Mishin's bureau had to support other higher priority military programs -- the 7K-OK earth orbit version of the Soyuz, the 7K-L1 circumlunar version, the Molniya communications satellite, and the R-9 and RT-2 ICBM's.
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