tag:blogger.com,1999:blog-7598615455712402973.post4513295879322506364..comments2024-03-25T11:14:45.840-04:00Comments on Polymath: Transitioning SpaceShipTwo to liquid fueled engines: a technology driver to reusable orbital launchers.Robert Clarkhttp://www.blogger.com/profile/16114043697010364282noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7598615455712402973.post-87559544712739165912014-03-06T01:30:38.229-05:002014-03-06T01:30:38.229-05:00Thanks. I have corrected that. Thanks also for thi...Thanks. I have corrected that. Thanks also for this recent article on the ESA spaceplane development:<br /><br />European Commercial Space Plane Prototype Set for May Drop Test<br />By Rob Coppinger, Space.com Contributor | March 04, 2014 10:00am ET<br /><a href="http://www.space.com/24901-europe-space-plane-drop-test.html" rel="nofollow">http://www.space.com/24901-europe-space-plane-drop-test.html</a><br /><br /><br />Bob Clark<br />Robert Clarkhttps://www.blogger.com/profile/16114043697010364282noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-68047149688787805152014-03-03T17:13:44.533-05:002014-03-03T17:13:44.533-05:00Hi Bob, the Hyperbola blog post about a liquid fue...Hi Bob, the Hyperbola blog post about a liquid fuelled SS2 was not written by David Todd. Seradata.com was spun out of Flightglobal.com where I started the Hyperbola blog in 2007. This is why you can find this;<br />http://seradata.com/hyperbola/2007/09/about-rob-coppinger/<br />I wrote the SS2 blog post, it was the last post I wrote before I left Flightglobal.com in April 2010. When Seradata.com moved the blog to their systems they screwed up the byline system and David Todd was made author of every single Hyperbola entry. David will confirm this. He can be contacted at david.todd@seradata.com<br />You can reach me at @Rob_Coppinger<br />RobRob Coppingernoreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-90587348583930752412014-02-01T05:57:13.981-05:002014-02-01T05:57:13.981-05:00 Thanks. I have corrected the authors name.
Bo... Thanks. I have corrected the authors name.<br /><br /> Bob ClarkRobert Clarkhttps://www.blogger.com/profile/16114043697010364282noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-10451376288235846302014-01-29T18:52:26.042-05:002014-01-29T18:52:26.042-05:00The problem with a liquid engine retrofit for Spac...The problem with a liquid engine retrofit for Spaceship Two is tankage in the airframe. This is all NTO tankage. It's not suitable for use with LOX or any of the liquid fuels. Since the tankage is built into the airframe, replacing it is a very serious issue. <br /><br />Actually, I'm surprised it's NTO instead of IRFNA. The latter is hazardous due to strong corrosivity, but also has a long safe-handling history. IRFNA and any solid hydrocarbon is a decent hybrid; IRFNA and any liquid hydrocarbon is a decent room-temperature liquid system. It's hypergolic ignition, too. <br /><br />A plain solid would have been a better choice in every way but fire safety. Quality control is how you really man-rate them, and mean it. But any class 1.3 composite explosive is a detonation hazard in a slow-cookoff scenario in a fire. <br /><br />GW<br /><br />Gary Johnsonhttps://www.blogger.com/profile/06723964751681093047noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-20918487861280779372014-01-29T15:23:43.012-05:002014-01-29T15:23:43.012-05:00Tom Bower is the authorTom Bower is the authorAnonymousnoreply@blogger.com