Jarvis (rocket)

Studied in 1985, long after the Saturn V had been retired, the Jarvis would be used for Pacific launches and would once again utilize the engines from the Saturn V, except that the Jarvis' third stage would use an R-4D engine that was developed for the Apollo Service and Lunar Module used in preparations for landing on the moon from 1968–72. The R-4D was currently at the time of study used on numerous spacecraft manufactured by Hughes, including Syncom 4 launched by the Space Shuttle from 1984–85, but the other engines were definitely retired at the end of Project Apollo.

References

* "Aviation Week and Space Technology", "Air Force Studies MLV", 1986-08-04, page 34.