Delta 4 – Page 2 – Spaceflight Now

Delta 4-Heavy launches U.S. spy satellite after months of delays

December 11, 2020 Stephen Clark

Running more than three months late, a United Launch Alliance Delta 4-Heavy rocket took off Thursday and carried a U.S. government spy satellite into an orbit thousands of miles above Earth in the first mission from the newly-renamed Cape Canaveral Space Force Station.

Live coverage: Delta 4-Heavy rocket launches from Cape Canaveral

December 10, 2020 Stephen Clark

A United Launch Alliance Delta 4-Heavy rocket lifted off from Cape Canaveral at 8:09 p.m. EST Thursday (0109 GMT Friday). The long-delayed mission is carrying a classified spy satellite into orbit for the National Reconnaissance Office.

ULA’s Delta 4-Heavy ready for another launch attempt after pad repairs

December 9, 2020 Stephen Clark

United Launch Alliance is set to try again to launch a Delta 4-Heavy rocket and a classified U.S. government spy satellite Thursday after delays of more than three months caused by persistent issues with the mission’s launch pad.

ULA’s Delta 4-Heavy rocket still grounded by launch pad problem

October 16, 2020 Stephen Clark

United Launch Alliance engineers have resolved the problem that triggered an abort of a planned Delta 4-Heavy rocket launch Sept. 30, but the company said Friday it is continuing to evaluate a concern with the launch pad swing arm retraction system at Cape Canaveral. ULA said the Delta 4-Heavy’s mission to launch a classified National Reconnaissance Office spy satellite will be postponed beyond next week.

Delta 4-Heavy launch aborted at T-minus 7 seconds

October 1, 2020 Stephen Clark

Another countdown for United Launch Alliance’s next Delta 4-Heavy rocket mission ended without a liftoff Wednesday after a computer sequencer detected a potential problem just before engine ignition.

Mobile gantry wheeled away from Delta 4-Heavy rocket at Cape Canaveral

September 30, 2020 Stephen Clark

United Launch Alliance teams rolled the Mobile Service Tower away from a Delta 4-Heavy rocket at Cape Canaveral’s Complex 37B launch pad Wednesday in preparation for liftoff on a national security mission.

Live coverage: Delta 4-Heavy countdown halted in final seconds

September 28, 2020 Stephen Clark

United Launch Alliance scrubbed the launch of a Delta 4-Heavy rocket Wednesday night less than 10 seconds before liftoff from Cape Canaveral, the second such abort suffered by this mission.. The launch of a classified National Reconnaissance Office spy satellite is expected to be delayed at least several more days as engineers assess the cause of Wednesday’s last-minute abort.

Delta 4-Heavy launch delayed by ground system issue

September 24, 2020 Stephen Clark

United Launch Alliance’s next launch attempt for its Delta 4-Heavy rocket from Cape Canaveral with a top secret U.S. government spy satellite will be delayed to no earlier than early Tuesday.

ULA targeting Sept. 26 for next Delta 4-Heavy launch attempt

September 17, 2020 Stephen Clark

United Launch Alliance said Thursday it is targeting Sept. 26 for the next attempt to send a classified U.S. government spy satellite into orbit aboard a Delta 4-Heavy rocket, following an abort Aug. 29 just three seconds before liftoff from Cape Canaveral.

Launch of NRO spy satellite delayed at least a week

August 29, 2020 Stephen Clark

The launch from Cape Canaveral of a top secret spy satellite for the U.S. government was aborted at the last moment early Saturday as its United Launch Alliance Delta 4-Heavy rocket ignited three main engines, a dramatic cutoff of the countdown that will delay the mission by at least one week.