4" Madcow Black Friday AGM 33 Pike "Overbuild" Thread

Discussion in 'High Power Rocketry (HPR)' started by Hooked On Rockets, Dec 28, 2019.

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  1. Feb 14, 2020 #31

    Hooked On Rockets

    Hooked On Rockets

    Hooked On Rockets

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    Aft Fins and internal Fillets...
    IMG_1983.JPG IMG_1984.JPG IMG_1985.JPG IMG_1986.JPG
     
    SeanW78 and g.pitts like this.
  2. Feb 21, 2020 #32

    Hooked On Rockets

    Hooked On Rockets

    Hooked On Rockets

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    Had the grand kids over during the weekend so not much progress..
    Got the aft fin internal fillets finished up and got the 4th CR epoxied in place along with its MMT reinforcement ring.

    IMG_1987.JPG

    Disregard the holes in the CR, I drilled those because I used this ring (along with the coupler tube) to set (push) the outer reinforcement rings into place earlier in the build, so I could tie a pull string into it for ring removal.
    Anyway, one more CRing and I can start on the DREADED EXTERNAL FILLETS!!! LOL
    Can't wait to get 'er ready for prime and paint!!!!

    SS
     
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  3. Mar 2, 2020 #33

    Hooked On Rockets

    Hooked On Rockets

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    Getting a little progress...
    Installed the reinforcement ring for the last centering ring...
    Plenty of epoxy...
    IMG_1988.JPG


    ...then pushed into place with the CRing and coupler tube, then CRing removed....
    IMG_1989.JPG


    Then I marked and "pilot punched" the location for drilling a hole to accept the "weld nut" "T-nut" "flange nut" or whatever they are called for the bottom rail button.....
    (I drilled it by hand with the bit going slow, no point in rushing and having the drill find it's own "off center route"...
    IMG_1991.JPG
    It'll be centered between the 4th and 5th CRings (yes, it has 5 instead of 2) opposed to drilling into the bottom CRing as suggested by the instructions....

    I was a bit undecided on that but after I got the flange nut glued up and covered with epoxy....
    IMG_1992.JPG
    ...it is ROCK SOLID!!!

    Then, I got the 5th CRing epoxied in place along with a "tail reinforcement ring" that I "stole" from the heavy duty coupler tube to help protect the butt end from getting damaged from landing...
    IMG_2001.JPG
    I intentionally left the reinforcement ring slightly "proud" of the rocket bottom, I think that will help when it lands, plus, when I get done with primer and paint, it should look nice!
    I CAed the crud out of it and now I'm ready to JB Weld the Aero Pack retainer on....then....
    ..."with the theme music from Jaws in the background playing"....
    FILLETS!!! LOL


    IMG_2002.JPG
     

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