tag:blogger.com,1999:blog-1592992209402300549.post7606359162085833858..comments2024-03-28T08:06:43.198-04:00Comments on The Silicon Graybeard: Mass Production of Rocket Engines is No Longer An OxymoronSiGraybeardhttp://www.blogger.com/profile/00280583031339062059noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-1592992209402300549.post-21592264757828357432021-07-21T15:30:03.726-04:002021-07-21T15:30:03.726-04:00This comment has been removed by a blog administrator.THE ONLY TRUE HACKER IN THE WORLD ®https://www.blogger.com/profile/06331558107674375316noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-30131537037875455292021-07-19T10:16:13.047-04:002021-07-19T10:16:13.047-04:00I knew he was going to settle on the magic number ...I knew he was going to settle on the magic number 42...Malatropehttps://www.blogger.com/profile/06130944283006020214noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-19620518034573866682021-07-19T03:23:07.385-04:002021-07-19T03:23:07.385-04:00Gimballing is far easier than controlled different...Gimballing is far easier than controlled differential thrust. And gimballing adds in the inherent vector change by pushing at an angle against the center spine of the space ship. <br /><br />Much like the efficiency of a center-line mounted rudder on a boat versus a steering oar. Push on the keel takes far less energy than pushing on the side. <br /><br />On small objects, like missiles, you can steer effectively with the steering vanes. But large Starship-sized objects, thrust vectoring is really the more efficient method. And actually reduces the complexity, as it's easier to gimbal an engine than it is to try moveable vanes or flaps on, yeah, a Starship-sized object.<br /><br />Thrusters are good for lower-speed motion control, or in-vacuum motion control, but aren't efficient at boosting through atmosphere. Thus, again, thrust-vectoring by gimballing.<br /><br />Everything is a trade-off. You could do vectoring using thrusters, but to effect the ship would require a lot of energy, which can be used more efficiently with a gimballed engine doing both direction change (at the end of the ship's rotation axis) and, well, boost-thrusting the whole thing.<br /><br />Beanshttps://www.blogger.com/profile/15293778848879361153noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-41289976788133763172021-07-19T01:18:45.070-04:002021-07-19T01:18:45.070-04:00Why gimbal any of the engines? If there is an oute...Why gimbal any of the engines? If there is an outer ring of engines, why not just vary the thrust around the ring to get yaw and pitch? Add in some thrusters for roll control (the easiest axis to maneuver about) and you save a bunch of gimbals, flexible hoses, servos, etc. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-79542875327448134282021-07-19T01:08:06.529-04:002021-07-19T01:08:06.529-04:00It's an exciting time.It's an exciting time.LLhttps://www.blogger.com/profile/05538854359365988863noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-80626104720268165162021-07-19T00:01:22.658-04:002021-07-19T00:01:22.658-04:00Yes, space as a routine thing, not as a hobby. Lo...Yes, space as a routine thing, not as a hobby. Love it.Johnhttps://www.blogger.com/profile/02317597809710979689noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-8509358246668041962021-07-18T23:14:49.510-04:002021-07-18T23:14:49.510-04:00This makes me smile. It's the world I expected...This makes me smile. It's the world I expected to live in many years ago. Silver Spaceships that take off and land vertically, and <i>whole factories devoted</i> to building nothing but ships and engines.<br /><br />Godspeed, Elon Musk!drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-25986185260168456672021-07-18T21:56:34.001-04:002021-07-18T21:56:34.001-04:00Absolutely amazing what the SpaceX is doing. And ...Absolutely amazing what the SpaceX is doing. And possibly up to 6 vacuum Raptors per Starship.<br /><br />Now, if only the FAA would get out of SpaceX's way.Beanshttps://www.blogger.com/profile/15293778848879361153noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-16356838750175970432021-07-18T21:35:32.257-04:002021-07-18T21:35:32.257-04:00Sounds like some serious upgrades for the ICBM inv...Sounds like some serious upgrades for the ICBM inventory is about to happen.Tsquarednoreply@blogger.com