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New F9 grid fins!
Hello All,
The Iridium satellites-carrying Falcon 9 that flew from Vandenberg Air Force Base today (this article also includes a video of the launch and Stage 1 landing: http://spaceflightnow.com/2017/06/2...et-in-two-days/ ) was the first to fly with the new titanium grid fins (see: http://spaceflightnow.com/2017/06/2...ts-fin-upgrade/ and also the attached photograph below). Also: These new, maintenance-free fins—which will be necessary on the triple-barreled Falcon Heavy—don’t self-ignite during re-entry as the original aluminum grid fins have. Their slightly larger size and scalloped profile improve their control authority, enabling stages to land in heavier winds. (This higher-wind landing capability was amply demonstrated today, as the descent and landing portion of the video shows--the first stage shook violently and its grid fins were very active, as it fought the low-altitude winds to land on the heaving deck of the drone ship!)
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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They are getting so good it's becoming "old hat" to some folks like the shuttle launches. I'm looking forward to seeing Falcon Heavy.
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I love sanding. |
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A user on nasaspaceflight posted a link to an interesting paper dealing with the design of those scalloped leading edges of the new grid fins Novel High-Performance Grid Fins for Missile Control at High Speeds: Preliminary Numerical and Experimental Investigations . The link is a pdf, the image comes from that pdf. Those peaks help with supersonic flow through the grid.
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Quote:
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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Quote:
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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Quote:
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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