![]() I had not read either of the two threads at before I posted in this thread but they also make the same analogy that I did about the supercavitating (bubbles around it) Russian Torpedo! The power of the rocket motors and the quantity of the rocket motors contributes greatly to this effect! A single more powerful rocket motor is not able to sustain the desired effect as consistently nor as successfully according to the tests which were performed with 1 and 3 rocket motors with varying degrees of thrust. NASA was still very intensively interested in documenting the actual experience vs the tests and monitored several SpaceX returns. NASA did a lot of hypersonic wind tunnel testing of retro rocket burns in 2010 modeling Martian entry/descent/landing prior to the first actual Falcon retroburn reentry attempts. ![]() The ablative heatshield of the capsule/spacecraft protects it from the heat of the shockwave by creating a much cooler plasma layer between the capsule/spacecraft and the extremely hot shockwave that forms in front and to the sides of it. With a returning capsule/spacecraft, a shockwave forms as compressing the atmosphere in front generates intense heat but also rapidly slows down the capsule/spacecraft (trading velocity for heat but still conserving energy) and the shockwave that forms is the source of the intense heat of reentry. The re-entry burn slows down the Rocket without permitting a shockwave to form. This means that neither the rocket nor the rocket engines experience the high heat loads that a returning capsule/spacecraft with a heatshield encounter. The rocket thrust essentially continually "blows away" any shockwave that tries to form and the rocket exhaust gasses flow around the rocket sort of the same way that the new Russian torpedos can achieve very high speeds by creating bubbles in front of and around the torpedo to reduce drag. The Falcon 9 Re-entry retro-burn actually prevents a shockwave from forming (and the shockwave is the primary source of heat during re-entry). SpaceX Time Machine - searchable mission archiveĬheck out our multireddits for spaceflight companies and solar system bodies! Industry RelationsĪre you in the rocketry/spacecraft industry? Attending a conference? Want subreddit flair? If so, please contact the subreddit moderators at not quite that simple.SpaceXLaunches - launch campaign tracking.SpaceX Stats - countdown and statistics.Rocket Emporium general spaceflight (SpaceX channel).There may be an unknown number of launches before the next public assignment. The next assignment does not necessarily mean the next launch of a booster. No transportation delays currently scheduled Well-formed - Is the post/comment in the right thread? Does the post have a descriptive and accurate title, a clean link, and the appropriate format?įor more, please read our community rules, and check out the Wiki & FAQ! Select Upcoming Events Substantive - Does the comment consist of something other than a joke or meme? In threads with a flair, does it contribute to a serious, thoughtful and technically-oriented discussion? Q5. Substantive - Does the post contribute to a serious, thoughtful and technically-oriented discussion? Q4C. Novel - Does the post contribute meaningful new information or questions to the community? Q4P. Relevant - Is the post directly and causatively related to SpaceX? Is the comment on-topic? Q3. Respectful - Is the post/comment conducive to a healthy community and a civil discussion on the merits? Q2. Community Rulesīefore posting or commenting, please ask yourself the following five questions: Q1. This board is not an official outlet for SpaceX information. Welcome to r/SpaceX, the premier SpaceX discussion community and the largest fan-run board on the American aerospace company SpaceX. Upcoming launches include: Starlink G 5-7 from SLC-4E, Vandenberg SFB on Jun 22 (07:19 UTC) and Starlink G 5-12 from SLC-40, Cape Canaveral on Jun 23 (13:56 UTC) This subreddit is fan-run, and is not an official SpaceX website.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |