ULA to temporarily stop using new engine nozzle because of vibration issue
Capitalism in space: Because of an unexpected vibration issue seen during its first launches, ULA engineers have decided to temporarily stop using a new engine nozzle developed for the upper stage of both its Atlas 5 and new Vulcan rocket.
ULA’s CEO Tory Bruno said June 23 that the company is studying the data from the flight and has not yet decided what corrective action, if any, it might take. In the meantime, the new version of the RL10 [engine] with the carbon nozzle extension will not be used in upcoming Atlas 5 missions, Bruno said during a talk at the Secure World Foundation’s Summit for Space Sustainability.
Concerns about vibrations in the engine led ULA to delay the launch of the Space Force STP-3 mission that had been scheduled for June 23 and was planned to fly with the enhanced RL10. The company has not announced a new launch date for STP-3. ULA first plans to launch Boeing’s Starliner Orbital Flight Test 2 mission to the International Space Station scheduled for July 30. “It’ll be several missions, probably next year” before ULA decides whether to fly the RL10 configuration with the nozzle extension, said Bruno. The company wants to be “fully satisfied that we understand it.”
Below the fold is the live stream from that May launch, cued to show that vibration. It is their intention to go back to the older nozzle configuration for the next few launches.
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Capitalism in space: Because of an unexpected vibration issue seen during its first launches, ULA engineers have decided to temporarily stop using a new engine nozzle developed for the upper stage of both its Atlas 5 and new Vulcan rocket.
ULA’s CEO Tory Bruno said June 23 that the company is studying the data from the flight and has not yet decided what corrective action, if any, it might take. In the meantime, the new version of the RL10 [engine] with the carbon nozzle extension will not be used in upcoming Atlas 5 missions, Bruno said during a talk at the Secure World Foundation’s Summit for Space Sustainability.
Concerns about vibrations in the engine led ULA to delay the launch of the Space Force STP-3 mission that had been scheduled for June 23 and was planned to fly with the enhanced RL10. The company has not announced a new launch date for STP-3. ULA first plans to launch Boeing’s Starliner Orbital Flight Test 2 mission to the International Space Station scheduled for July 30. “It’ll be several missions, probably next year” before ULA decides whether to fly the RL10 configuration with the nozzle extension, said Bruno. The company wants to be “fully satisfied that we understand it.”
Below the fold is the live stream from that May launch, cued to show that vibration. It is their intention to go back to the older nozzle configuration for the next few launches.
The support of my readers through the years has given me the freedom and ability to analyze objectively the ongoing renaissance in space, as well as the cultural changes -- for good or ill -- that are happening across America. Four years ago, just before the 2020 election I wrote that Joe Biden's mental health was suspect. Only in the past two weeks has the mainstream media decided to recognize that basic fact.
Fourteen years ago I wrote that SLS and Orion were a bad ideas, a waste of money, would be years behind schedule, and better replaced by commercial private enterprise. Even today NASA and Congress refuses to recognize this reality.
In 2020 when the world panicked over COVID I wrote that the panic was unnecessary, that the virus was apparently simply a variation of the flu, that masks were not simply pointless but if worn incorrectly were a health threat, that the lockdowns were a disaster and did nothing to stop the spread of COVID. Only in the past year have some of our so-called experts in the health field have begun to recognize these facts.
Your help allows me to do this kind of intelligent analysis. I take no advertising or sponsors, so my reporting isn't influenced by donations by established space or drug companies. Instead, I rely entirely on donations and subscriptions from my readers, which gives me the freedom to write what I think, unencumbered by outside influences.
Please consider supporting my work here at Behind the Black.
You can support me either by giving a one-time contribution or a regular subscription. There are five ways of doing so:
1. Zelle: This is the only internet method that charges no fees. All you have to do is use the Zelle link at your internet bank and give my name and email address (zimmerman at nasw dot org). What you donate is what I get.
2. Patreon: Go to my website there and pick one of five monthly subscription amounts, or by making a one-time donation.
3. A Paypal Donation:
5. Donate by check, payable to Robert Zimmerman and mailed to
Behind The Black
c/o Robert Zimmerman
P.O.Box 1262
Cortaro, AZ 85652
You can also support me by buying one of my books, as noted in the boxes interspersed throughout the webpage or shown in the menu above. And if you buy the books through the ebookit links, I get a larger cut and I get it sooner.
This shows the value of test flying the avionics, boosters, fairings, and upper-stage engines on Atlas before Vulcan flies. They now have time to solve these issues while still flying a configuration that can get their customers’ payloads to orbit. Good on ULA for doing this.
J-2 was heavy but simple. They should have went bigger but with less part count.