tag:blogger.com,1999:blog-7598615455712402973.post3480864958639328293..comments2024-03-25T11:14:45.840-04:00Comments on Polymath: Altitude compensation attachments for standard rocket engines, and applications, Page 2: impulse pressurization methods.Robert Clarkhttp://www.blogger.com/profile/16114043697010364282noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7598615455712402973.post-32769477278290610002019-03-22T08:22:26.448-04:002019-03-22T08:22:26.448-04:00Fantastic goods from you, man. Ive study your stuf...Fantastic goods from you, man. Ive study your stuff ahead of and you're just as well amazing. <br /><br /><a href="https://onecompensation.com/" rel="nofollow">https://onecompensation.com/</a>Harry Watsonhttps://www.blogger.com/profile/06722739026702123169noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-36849103027416447952019-02-24T09:33:18.878-05:002019-02-24T09:33:18.878-05:00Thanks for sharing this informative post!
environm...Thanks for sharing this informative post!<br /><a href="https://www.envisystech.com/" rel="nofollow">environmental test chamber</a><br /><a href="https://www.envisystech.com/products/altitude-chambers" rel="nofollow">Altitude chamber</a><br /><a href="https://www.envisystech.com/products/salt-spray-chamber" rel="nofollow"> Salt spray chamber</a><br />Arjun Kapoorhttps://www.blogger.com/profile/14245413790017064904noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-71162819962988806872016-05-09T09:26:50.020-04:002016-05-09T09:26:50.020-04:00 Thanks for that. A disadvantage is that it pushes... Thanks for that. A disadvantage is that it pushes the entire flow to the side. This will largely degrade performance at sea level. My proposal uses a small portion of the flow to provide pressure to the walls, thereby maintaining a larger portion of the vacuum performance.<br /><br /> Bob ClarkRobert Clarkhttps://www.blogger.com/profile/16114043697010364282noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-79337643209327820502016-01-27T09:18:37.286-05:002016-01-27T09:18:37.286-05:00The whole "attitude compensation" idea d...The whole "attitude compensation" idea doesnt seem that good to me. As the best aerospike hydrogen engine developed had somewhat mediocre performance. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20020017580.pdf<br /><br />336 at sea level and 439 at vacuum. <br /><br />While the space shuttle main engine had the usual bell and still had 366s isp at sea level and 452 at vacuum. <br /><br />Main performance difference is from chamber pressure, 58bar vs 206 bar. <br /><br />Same thing with kerosene engines, RD-180 with 267bar chamber pressure almost matches Merlin 1D-Vacuum engine isp. 338s vs 348, even tho merlin has 165:1 expansion nozzle and rd-180 only has 37:1.<br /><br />So, I would forget attitude compensation and just use the highest pressure I could afford. Then size the nozzle so it makes most impulse during the mission. Rokhttps://www.blogger.com/profile/01594627296669652306noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-32559533194979392442016-01-22T10:08:43.904-05:002016-01-22T10:08:43.904-05:00There is one apparatus that does push exhaust gass...There is one apparatus that does push exhaust gasses towards the bell. It is called a expansion deflection nozzle. It operates passively.Rokhttps://www.blogger.com/profile/01594627296669652306noreply@blogger.com