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  1. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    March 2018 version: Chute deployment handles modified with auxiliary linkages? Looks very dangerous. Source: https://www.realrocketman.com/
  2. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    March 2018 version of rocket: Main chute did not deploy. Main chute had a sling for horizontal decent. Hit nose first instead. He mentioned on this launch having automatic chute release. Deployment handle in more difficult push arrangement, rather than pull. Same fake licence plate...
  3. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    I'm speculating his seat broke. https://www.youtube.com/watch?v=sZRmbxUt9TY
  4. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    Three chutes (red) with deployment rockets directly aimed at passersby. I do not know what state of arm they might have been in during transport. Green is damage to skirt. Set off by pulling handle on end of wire cable. Solid rocket motors ignited by percussion primers. Insufficient slack in...
  5. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    I was checking out Mike's parachutes in this video. https://www.youtube.com/watch?v=BFwoU2SZg_s It seems he had three chutes. Note how for his 3rd launch he used a converted dump truck. What is strange about this launch truck is the homemade licence plate. The plate number UCC 1-308 is used...
  6. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    Ballistic parachute emergency deployment: https://youtu.be/jgfG2DfPB6I?t=139
  7. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    How would this suffer undetectable damage?
  8. jrs_87

    Feds order Santa Clara County’s biggest reservoir to be drained due to earthquake collapse risk

    https://www.mercurynews.com/2020/02/24/breaking-feds-order-anderson-reservoir-to-be-drained-due-to-earthquake-risk/ Over reaction?
  9. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    Rocketman: Mad Mike's Mission to Prove the Flat Earth Watch on Amazon https://www.amazon.com/Rocketman-Mikes-Mission-Prove-Earth/dp/B07VX75VN6/ref=sr_1_5?keywords=rocketman&qid=1582615687&sr=8-5 I think you will find this program interesting. (For me, it was also painful.)
  10. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    Living your dream should not be a euphemism for taking unnecessary and ill-informed risk. This stunt seems to have been underfunded. It seems his original interest was using steam rocket to jump over a "reasonable" distance. This morphed into claims he could reach the stratosphere when it got...
  11. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    Not trying to make joke - launch on 02/22/2020, duration of flight exactly 20 seconds. There is a lot to learn here about human nature and the disregard of engineering realities. I wonder who was helping him? Were they really aware of the risk? His first rocket took 10 years to construct. How...
  12. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    https://www.eng-tips.com/viewthread.cfm?qid=432731
  13. jrs_87

    Steam rocket designed by self-trained man crashes due to premature parachute deployment.

    This person's activity has been noted before on eng-tips. https://www.dailymail.co.uk/news/article-8033605/Daredevil-Mad-Mike-Hughes-dies-age-64-launching-homemade-rocket.html https://youtu.be/Bmq_lV3Va9Q
  14. jrs_87

    Miami Pedestrian Bridge, Part XIV

    Time to pivot discussion to replacement? http://panthernow.com/2019/10/31/decisions-to-proceed-with-fiu-bridge-are-insensitive-and-irrisponsible/
  15. jrs_87

    Miami Pedestrian Bridge, Part XIV

    Re: Corpus Christi Harbor Bridge. Does anyone here know what kind of waiver or exemption allows children to be in construction yard? See photo gallery here: https://harborbridgeproject.com/gallery/
  16. jrs_87

    Miami Pedestrian Bridge, Part XIV

    Re: Repairability When a girder fails, usually the entire girder is replaced as a repair. Since this bridge was designed as a single girder, the only practical form of repair is total replacement. Since the whole idea of the single girder was to lower cost, it should therefore not have been a...
  17. jrs_87

    Miami Pedestrian Bridge, Part XIV

    epoxybot (Structural)15 Nov 19 20:04 Please check post for typo. Third paragraph, should be March 10, not 15.
  18. jrs_87

    Miami Pedestrian Bridge, Part XIV

    NTSB Final Report https://miami.cbslocal.com/wp-content/uploads/sites/15909786/2019/11/NTSB-Final-FIU-Bridge-Collapse-Report.pdf
  19. jrs_87

    Miami Pedestrian Bridge, Part XIV

    https://www.sciencechannel.com/tv-shows/engineering-catastrophes/full-episodes/nightmare-in-florida
  20. jrs_87

    Miami Pedestrian Bridge, Part XIV

    Source: Comment to this article> https://www.enr.com/articles/48005-ntsbs-fiu-bridge-collapse-investigation-finds-many-problems Can someone please elaborate on this comment? I suspect point of comment is diminished if the bar tension changes were staggered at 50 kips. Are two balanced bars...

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