Blaine's Kevlar Anti-Zipper using Foam Ear Plug

Discussion in 'Low Power Rocketry (LPR)' started by BlaineS, Sep 21, 2019.

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  1. Sep 21, 2019 #1

    BlaineS

    BlaineS

    BlaineS

    Blaine Seaboalt

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    Hello all,

    In the "totally over engineered LPR department"...

    I just wanted to share my Kevlar Anti-Zipper using a Foam Ear Plug.

    Producing motorsports television, I have an over abundance of foam ear plugs so, to put them to good use... please see description below pictures...

    IMG_6583.JPG IMG_6584.JPG IMG_6585.JPG IMG_6586.JPG IMG_6588.JPG IMG_6591.JPG IMG_6592.JPG IMG_6593.JPG

    1. I poke a hole through a new & clean (LOL) ear plug with an awl

    2. Insert a plastic "bar straw and stir stick" using the inserted awl

    3. Cut away excess straw

    4. Thread kevlar shock cord through straw with the "big end" of the ear plug orientated to the top of the body tube

    5. Use plastic cement to glue ear plug in place on shock cord at the top of body tube

    Have a great day and thank you all for sharing your great ideas!
    Blaine
     
    MarcoPolo, prfesser, Fritzk and 7 others like this.
  2. Sep 22, 2019 #2

    K'Tesh

    K'Tesh

    K'Tesh

    OpenRocket Chuck Norris

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    Step 0. Ensure that the ear plug is not currently inserted into your (or anybody else's) ear (or any other orifice). ;)

    Seriously though... Looks like a good setup!
     
    MarcoPolo and BlaineS like this.
  3. Sep 24, 2019 #3

    BlaineS

    BlaineS

    BlaineS

    Blaine Seaboalt

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    Thank you K'Tesh... that means a lot!

    Also, some types of glue and kevlar don't stick well together, in that case, another option is to...

    1. Tie a knot in the kevlar below the ear plug

    2. Remove the straw (or leave it in)

    3. Tie a knot in the kevlar about the ear plug

    ...and your plug is secure at the top of the body tube!
     
  4. Sep 29, 2019 #4

    Tom

    Tom

    Tom

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    That's a great idea!

    Can I suggest one 'improvement'?

    Instead of a coffee stirrer try the plastic tube from a Q tip. It has a lot smaller ID and will be more likely to stay put!
     
  5. Sep 29, 2019 #5

    Mugs914

    Mugs914

    Mugs914

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    Gee Blaine, that is a brilliant idea...
     

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