![]() ![]() The point of the test is to go through launch countdown and procedures, sort of like a rehearsal for launch day to make sure everything goes according to plan. Instead, engineers will load up the Vulcan Centaur rocket with fuel and fire up its twin booster BE-4 engines. The BE-4 engines run on a mixture of liquid methane and liquid oxygen.ĭuring its flight readiness test, the rocket won’t actually get off the ground. The Vulcan Centaur is designed to lift 27.2 metric tons (60,000 pounds) to low Earth orbit and 6.5 metric tons (14,300 pounds) to geosynchronous orbit. The fully expendable 202-foot-tall (62-meter) rocket is set to replace ULA’s Atlas V and Delta IV rockets, which have been in use for the past two decades. ![]() The rocket’s first stage is powered by two BE-4 engines built by Blue Origin, which were delivered more than four years past the deadline, contributing to the delay of Vulcan’s inaugural flight. Vulcan’s maiden flight had already been delayed several times, with ULA initially hoping to launch its rocket in 2020 and then again in 2022. Two weeks before liftoff, however, a fiery explosion swept over the rocket’s test stand at NASA’s Marshall Space Flight Center in Alabama while engineers were pressurizing its upper stage. The highly-anticipated debut of ULA’s Vulcan Centaur was originally scheduled for May 4. The company has had a bumpy ride in trying to see its rocket fly for the first time. A “delayed response from the booster engine ignition system” during countdown forced ULA to halt the static test, with the system requiring “further review prior to proceeding with the flight readiness firing,” the company said in a tweet. The Colorado-based company had originally scheduled Vulcan’s static fire test for May 25 but ended up rolling the rocket from its launch pad back to the Vertical Integration Facility due to an issue with its booster engine. Enjoy the bookmark as you read books all summer long, and don’t forget to participate in Carnegie Library of Pittsburgh’s Summer Reading program! Want more at-home fun creating cool stuff and making beautiful things? Check out more Maker Monday projects right here.June 7 Live Broadcast: Vulcan Cert-1 Flight Readiness Firing (FRF) ![]() Now you’re ready to start reading and using your bookmark to hold your place. Your Monster Bookmark can be as silly or creepy as you wish! Then cut out eyes, hair, pointy teeth, or a long scary tongue and glue in place. Step five: Now you can decorate your bookmark any way you’d like! You can cut a different colored square slightly smaller than the bookmark square and glue it inside. This creates the basic bookmark, which will slip easily over the corner of a page of a book. Step four: Refold the two sides inward and tuck them both inside. The back of the triangle remains pointing up, while the front part is tucked inside. Step three: Open the paper back to a triangle, then fold the top of the triangle inside, so it meets the fold lines. Step two: Fold the two side points of the triangle in meet at the center point (see above). Step one: Fold a piece of square paper in half, corner to corner, to make a triangle.
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