Modular rocket

Several such rockets use similar concepts such as unified modules to minimize expenses on manufacturing, transportation and for optimization of support infrastructure for flight preparations.

The National Launch System study (1991-1992) looked at future launchers in a modular (cluster) fashion.

The Common Core Booster utilizes the Russian made RD-180 burning RP-1 fuel with liquid oxygen producing a thrust of 3.8 MN.

[2] The Delta IV launcher family used the liquid fuel Common Booster Core as the first stage of the various rocket configurations.

[citation needed] The Universal Rocket Module (URM) is the modular liquid fueled first stage of the Angara expendable launch system.

Later evaluations revealed that the propellant needed for each side booster to land (reuse) are already close to the margins so there is really no advantage to crossfeed.

A Delta IV Heavy , featuring three Common Booster Cores ; one used as the first stage and two as boosters