Under stormy skies, the SpaceX Super Heavy V3 booster and Starship spacecraft stand on Orbital Launch Pad 2 at Starbase, Texas, on Thursday before its planned test launch was scrubbed for the day. Photo by Joe Marino/UPI | License Photo

May 21 (UPI) -- SpaceX on Thursday scrubbed the planned first test flight for its redesigned Super Heavy megarocket, the largest rocket ever built, from its new Texas launch pad.

Following several delays of the countdown at 40 seconds remaining, SpaceX spokesman Dan Huot announced the launch would be delayed due to engineering issues which could not be immediately remedied.

"We are expecting to be able to make another flight attempt tomorrow, but obviously stay tuned to our social media," he said.

In addition to trying out the redesigned Super Heavy propulsion system, the launch is meant to assess upgraded systems on Starship, including the deployment of 22 Starlink satellite simulators, intentionally stressing its new flight control flaps and attempting the "dynamic banking maneuver" that it eventually will use to land back on its pad.