Virgin Galactic finally admitted to its engine troubles on Friday.
Virgin Galactic finally admitted to its engine troubles on Friday.
They have dumped the original engine, switching to a different engine design that the rumors have said they have been testing for the past year.
The company press release is here, with commentary here.
Though it is a good thing that the company has finally come clean and made the switch, they probably waited far too long to do it, as the problems with the old engine likely caused several years delay in their schedule, allowing other companies to catch up with them and thus losing the significant technological advantage that they once held.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon. from any other book seller, or direct from my ebook publisher, ebookit.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
Virgin Galactic finally admitted to its engine troubles on Friday.
They have dumped the original engine, switching to a different engine design that the rumors have said they have been testing for the past year.
The company press release is here, with commentary here.
Though it is a good thing that the company has finally come clean and made the switch, they probably waited far too long to do it, as the problems with the old engine likely caused several years delay in their schedule, allowing other companies to catch up with them and thus losing the significant technological advantage that they once held.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon. from any other book seller, or direct from my ebook publisher, ebookit. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
The first step is admitting there is a problem
The whole of the engine design is flawed. Just changing the solid fuel will not help much. It will never correct the real problem.
Adding He to the mix is not a solution either. Just a patch job.
By adding the oxidizer to the top of the engine away from the nozzle you create a situation in which the burn chamber is ever changing and changing in unpredictable ways.
I bet they added a few knock sensors to the side of the engine and tried adding He as needed to keep the vibrations down. Sort of like they add less or more fuel and change the ignition timing to keep knocks out of internal combustion car engines. It works but only to a point. While stopping knocks it lowers engine power.
Since VG has recently stated they will not be able to reach space even with the new engines I bet they found that out.
This could impact Dream Chaser as well. The company that makes it also makes the SS2 engines – and uses the same kind of engines on the DC. ….with issues they don’t like to admit to.
Well really, hybrids are a dump system. You kinda mix the problems with solids, liquids, and pressurized feed systems, with out really getting the best of any of them.