Free 173 Best Homemade Tools eBook:  
Remove advertisements
Results 1 to 8 of 8

Thread: 3-ring parachute release system - GIF, video, patent

  1. #1
    Jon
    Jon is online now Jon has agreed the Seller's Terms of Service
    Administrator Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    13,319
    Thanks
    2,570
    Thanked 5,035 Times in 1,911 Posts

    3-ring parachute release system - GIF, video, patent

    A 3-ring parachute release system. Also called a "3-ring circus", it's used to reliably release a malfunctioning main parachute so that the reserve chute can be safely deployed.



    46-second video showing the 3-ring release mechanism in real-time, and again at 1/20th speed:



    Awarded patent #4337913 in 1982, to inventor William R. Booth.







    More:
    https://www.google.com/patents/US4337913
    https://en.wikipedia.org/wiki/Malfunction_(parachuting)

  2. The Following 3 Users Say Thank You to Jon For This Useful Post:

    gunsgt1863 (10-22-2017), Seedtick (10-14-2017), Toolmaker51 (10-13-2018)

  3. #2
    Ralphxyz's Avatar
    Join Date
    Dec 2016
    Posts
    358
    Thanks
    0
    Thanked 66 Times in 55 Posts

    Ralphxyz's Tools
    Nice, thanks for posting.

    Ralph

  4. #3
    hemmjo's Avatar
    Join Date
    Feb 2017
    Posts
    79
    Thanks
    7
    Thanked 54 Times in 25 Posts

    hemmjo's Tools
    Made me cringe to see how easily that one little element gets pulled free to release the whole thing!!!

    I realize when you get into trouble, you need to be able to get the release quick and easy, but you sure don't want it to get pulled by mistake.

    How is that release mechanism secured, to prevent accidental release, yet still be easily accessed when needed?

  5. #4
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,575
    Thanks
    104
    Thanked 2,949 Times in 1,025 Posts

    mklotz's Tools
    At first glance it would appear that the middle ring isn't needed. The large ring could be directly restrained by the small ring.

    However there's a lot of force (weight) pulling on the large ring and that force would be trying to pull the small ring loose from its restraint. Adding the middle ring seriously reduces the force on the small ring. Each of the two bigger rings pushes on the ring above it near the point about which that ring can pivot, its fulcrum. This purposely inefficient placement of the force near the fulcrum reduces the force with which the ring being pushed can push on the one above it.

    The rings must be circular. Any other shape runs the risk of hanging up and not sliding through the ring below when it comes free from its restraint.

    The design is exceptional. It's simple yet effective and easily constructed. It should be awarded some sort of design prize.
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  6. The Following User Says Thank You to mklotz For This Useful Post:

    Toolmaker51 (10-13-2018)

  7. #5
    Jon
    Jon is online now Jon has agreed the Seller's Terms of Service
    Administrator Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    13,319
    Thanks
    2,570
    Thanked 5,035 Times in 1,911 Posts
    Quote Originally Posted by mklotz View Post
    The design is exceptional. It's simple yet effective and easily constructed. It should be awarded some sort of design prize.
    Good call!



    More parachute-themed inventions from this same guy:

    Skyhook reserve parachute deployment system
    Means for releasably attaching strands
    Retractable safety ripcord

    More about the inventor Bill Booth: https://en.wikipedia.org/wiki/Bill_Booth

    Interestingly, Booth coined a rule about how risk increases with implementation of safety gear, here written about in the Harvard Business Review:



    This is a controversial theory known as Risk Homeostasis. If you've ever driven a vehicle faster when wearing a helmet, you've experienced this.

  8. #6
    Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    1,146
    Thanks
    2,422
    Thanked 1,143 Times in 651 Posts

    Toolmaker51's Tools
    Quote Originally Posted by Jon View Post
    1.A 3-ring parachute release system. Also called a "3-ring circus", it's used to reliably release a malfunctioning main parachute
    2.so that the reserve chute can be safely deployed.
    3.Awarded patent #4337913 in 1982, to inventor William R. Booth.
    4........
    Even with tradition of hollering a funny name to initiate a jump, I'd still need more than 3 reasons to fall out of a perfectly good plane...
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  9. #7
    mklotz mklotz's Avatar
    Join Date
    Aug 2015
    Location
    LA, CA, USA
    Posts
    1,575
    Thanks
    104
    Thanked 2,949 Times in 1,025 Posts

    mklotz's Tools
    Quote Originally Posted by Toolmaker51 View Post
    Even with tradition of hollering a funny name to initiate a jump, I'd still need more than 3 reasons to fall out of a perfectly good plane...
    The stories about the origin of the cry, Geronimo, are fun to read...

    https://en.wikipedia.org/wiki/Geronimo_(exclamation)

    I never cease to be amazed; you can find the answer to any question that has a legitimate answer on the web.
    ---
    Regards, Marv


    Home Shop Freeware
    http://www.myvirtualnetwork.com/mklotz

  10. The Following User Says Thank You to mklotz For This Useful Post:

    Toolmaker51 (10-14-2018)

  11. #8
    Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    1,146
    Thanks
    2,422
    Thanked 1,143 Times in 651 Posts

    Toolmaker51's Tools
    Quote Originally Posted by mklotz View Post
    The stories about the origin of the cry, Geronimo, are fun to read...

    https://en.wikipedia.org/wiki/Geronimo_(exclamation)

    I never cease to be amazed; you can find the answer to any question that has a legitimate answer on the web.
    A ton of interesting accounts, all connected to a real figure. Rabbit holes and parachutes make a good combination.
    So right Marv. Our web's a source of unimaginable breadth. How deep is anyone's guess. Compared to schooling by means known filtered, revisionist, incomplete, or ignored; cannot generate thinkers fractionally a degree superior. I'd rather sift 10 answers, often more, to a question. If learning is a pyramid, broad foundations support conclusions better than a mere piling. Too many things are fed us, making an improper diet.
    It's something akin to better directors of 'B' movies, ie Ed Wood. He envisioned things clearly, and accomplished what he could with limited resources, unrestrained by corporate interests. His supply of unbound imagination makes his work still fun to experience decades later. It's said he never directed a shot he didn't like. The fact Tim Burton assembled a distinctive cast to tell and sell his story, rated 7.9/10, proves it.


    Post your reply!
    Join 33,912 of us and get our 173 Must Read Homemade Tools eBook free.



    173 Must Read Homemade Tools
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •