Repaired SpaceX Rocket Set for 2nd Blastoff Try on May 22

January 28, 2018 – 11:13 am

By Ken Kremer

SpaceX engineers have successfully replaced a faulty valve in a first stage engine that triggered a launch abort on May 19 and that now clears the way for a second launch attempt of the firms Falcon 9 rocket and Dragon spacecraft in the overnight hours early on Tuesday, May 22.

Litfoff of the Falcon 9/Dragon duo on the first private rocket bound for the International Space Station (ISS) is slated for 3:44 AM on May 22 on the historic test flight mision dubbed COTS 2.

“We are ready for blastoff on May 22, ” SpaceX spokeswoman Kirstin Grantham told Universe Today during an interview at Space Launch Complex-40 at Cape Canaveral, Florida earlier today as the Falcon 9 rocket was standing erect at the pad under a brilliant blue sky.

“The work to replace a faulty nitrogen engine valve is complete and took just a few hours, ” Grantham confirmed to me.

After a thorough inspection of the vehicle and analysis of the repair, the SpaceX team cleared the rocket for launch. The rocket remained vertical during the repair work.

The weather forecast has improved markedly to an 80% chance of favorable conditions at launch time because the chance of rain showers has decreased. The primary concern is for cumulus clouds.

The launch will be broadcast live on NASA TV and via SpaceX Webcast at

As on May 19, the launch window is instantaneous meaning SpaceX has just a fraction of a second to get the vehicle off the ground and there is no chance to recycle to a later launch time on the same day.

“The next possibility to launch after May 22 is on May 25, ” said Grantham in the event of a scrub on Tuesday. “We could not reserve May 23 due to a conflict with Air Force requirements.”

The two stage Falcon 9 rocket is 157 feet tall. The first stage generates a million pounds of thrust from nine Merlin 1 C engines configured in a 3 by 3 by 3 arrangement.


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