Ares V
In May 2010, NASA planned flight demonstrations of Ares V hardware along with Ares I hardware after the scheduled upcoming Ares I-X Prime test of the Ares I five-segment SRB first stage. Several flights were listed as "Heavy Lift" test flights for testing the first stage of the Ares V simultaneously with the Ares I upper stage attached on top of the Ares V first stage. This would save both time and money in avoiding the gap between testing Ares I and Ares V hardware with limited funding.