ABL Space Systems announced some changes to RS1, Blue Origin broke ground in Huntsville and signed a new customer, and SpaceX has been making steady progress on Starship.

This episode of Main Engine Cut Off is brought to you by 35 executive producers—Kris, Pat, Matt, Jorge, Brad, Ryan, Jamison, Nadim, Peter, Donald, Lee, Jasper, Chris, Warren, Bob, Russell, John, Moritz, Joel, Jan, David, Grant, Mike, David, Mints, Joonas, Robb, Tim Dodd the Everyday Astronaut, Frank, and six anonymous—and 218 other supporters on Patreon.

• ABL Space Systems increases performance and cuts price of its small launch vehicle - SpaceNews.com
• Blue Origin breaks ground for BE-4 factory - SpaceNews.com
• Blue Origin’s Powerful New Glenn Rocket to Launch Telesat’s Advanced Global LEO Satellite Constellation | Telesat
• Telesat signs New Glenn multi-launch agreement with Blue Origin for LEO missions - SpaceNews.com
• New Raptor Fires Up - Main Engine Cut Off
• Elon Musk on Twitter: “Design requires at least 170 metric tons of force. Engine reached 172 mT & 257 bar chamber pressure with warm propellant, which means 10% to 20% more with deep cryo.”
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• Music by Max Justus