Then, last September, an Alpha first stage exploded on the stand<\/a> during prelaunch tests for “Stairway to Seven.” This mishap added months to the mission development timeline as the company investigated a cause and got another booster ready for flight.<\/p>\n Article continues below <\/p>\n You may like<\/p>\n \n Firefly Aerospace’s Alpha rocket launches on the “Stairway to Seven” mission on March 11, 2026. (Image credit: Firefly Aerospace)<\/p>\n The test-stand explosion was eventually traced to “a process error during stage one integration that resulted in a minute hydrocarbon contamination,” according to a Firefly update in November<\/a>, which ruled out a design flaw in the rocket and cleared its path back to the launch pad.<\/p>\n <\/p>\n Nevertheless, Firefly changed “Stairway to Seven.” The company reframed it as a test flight, focusing on achieving “nominal first and second stage performance,” according to a mission description<\/a>.<\/p>\n “Stairway to Seven” took to this skies this evening (March 11) from Space Launch Complex-2 at Vandenberg Space Force Base<\/a> in California, with liftoff at 8:50 p.m. ET (0050 GMT on March 12).<\/p>\n At approximately 2 minutes, 40 seconds into flight, Alpha successfully executed first-stage separation, jettisoning its main booster as the rocket’s upper stage continued powering its way to orbit.<\/p>\n Following fairing ejection about 30 seconds later, Alpha cut off its upper-stage engine about 8 minutes after liftoff and reached orbit as planned, 151 miles (243 kilometers) above Earth.<\/p>\n “Mission success! Alpha Flight 7 achieved nominal performance and validated key systems ahead of our Block II configuration upgrade. This test flight also delivered a demonstrator payload for @LockheedMartin. <\/a>Congratulations to the entire Stairway to Seven team!” Firefly wrote via X<\/a> after the flight.<\/p>\n Mission success! Alpha Flight 7 achieved nominal performance and validated key systems ahead of our Block II configuration upgrade. This test flight also delivered a demonstrator payload for @LockheedMartin . Congratulations to the entire Stairway to Seven team! Read more:\u2026 pic.twitter.com\/e7Sp0RqB9HMarch 12, 2026<\/a><\/p>\n Having now successfully climbed the “Stairway to Seven,” Firefly will retire Alpha’s Block I configuration, as it continues upgrading the launch vehicle to enhance its capabilities.<\/p>\n What to read next<\/p>\n More than just a requalification flight, Firefly says Alpha’s seventh launch served to “test and validate key systems ahead of Firefly\u2019s Block II configuration,” which is slated to debut on Flight 8.<\/p>\n Alpha Block II will stand about 7 feet (2.13 meters) taller than its 96.7-foot-tall (29.6-m) predecessor and will feature upgraded avionics and power systems, as well as improved thermal protections.<\/p>\n Today’s launch was a significant step forward for Firefly, which has excelled in some areas of its space business more than others. Last year, the company’s uncrewed Blue Ghost<\/a> moon lander became the first private spacecraft to successfully complete a mission on the lunar surface, but Alpha has now managed full mission success just three times in its seven orbital launch attempts.<\/p>\n Editor’s note: This story was updated at 12:30 a.m. ET on March 12 to include Firefly’s post-launch X post.<\/p>\n![\"a](\"https:\/\/www.newsbeep.com\/uk\/wp-content\/uploads\/2026\/03\/N4nB2UEnJb3MiQcmBigQA9.jpg\")
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