Kestamid

Discussion in 'Techniques' started by ktc, Feb 21, 2020.

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  1. Feb 21, 2020 #1

    ktc

    ktc

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    Hi.Does Kestamid PA6G use for rocket tube?.
     
  2. Feb 21, 2020 #2

    58pan

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    Maybe ?
    A quick image search didn't bring up any less than 1/4 inch wall tube. Do you have a source for some with a thinner wall? With the weight down close to a fiberglass tube?
    Is there a glue that will stick to it? It would be difficult to build a rocket without glue. Not impossible but difficult.
    So Maybe, if you can find some long tube with about a 3mm wall. Build the motor mount with fins as an assembly. Cut slots to slide the assembly into the tube and attach to the centering rings with screws. Add an additional CR with OD same as tube OD for a shelf to support the tube end to take some pressure off the screws.
    Good Luck. Let us know how it works.
     
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  3. Feb 21, 2020 #3

    jlabrasca

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    Are you asking about the airframe of the rocket or about the casing for the rocket motor?
     
  4. Feb 21, 2020 #4

    prfesser

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    Hello ktc, based on your previous posts I assume you are looking for a motor casing (correct me if I am wrong).

    Kestamid is a type of cast nylon. Most polymers soften with heat, and nylon is no exception.

    Best regards -- Terry
     
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  5. Feb 22, 2020 #5

    ktc

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    It is rocket shell,main body
     
  6. Feb 22, 2020 #6

    ktc

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    No.it is for rocket shell,main body
     
  7. Feb 22, 2020 #7

    jlabrasca

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    Okay. Then @58pan has answered your question. A kestamid tube that is not too heavy could work.

    There are many other questions to ask.

    Why use kestamid instead of something else?
     
  8. Feb 23, 2020 #8

    ktc

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    Because it is cheaper and lighter than CTP and it is more original something else
     
  9. Feb 23, 2020 #9

    jlabrasca

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    CTP = fiberglass?

    Your rocket will be scored on originality?
     
  10. Feb 23, 2020 #10

    ktc

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    Yes,it will
    Yes ctp is type of fiberglass
     
  11. Feb 23, 2020 #11

    jlabrasca

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    Good luck in the contest. When do you launch?
     
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  12. Feb 23, 2020 #12

    ktc

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    in september
     
  13. Feb 24, 2020 #13

    prfesser

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    Some calculations that are out of my bailiwick are warranted. How much will Kestamid distort with temperature, and will a problem-causing temperature be reached before the rocket reaches apogee? Once it's on its way down it doesn't much matter what happens to the airframe. But IMHO on the way up, distortion from increased temperature could cause a catastrophic ending to the flight.
     
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