Rocketarium Black Brant IVb Mod1

Discussion in 'Mid Power Rocketry (MPR)' started by Tyler P, Nov 4, 2018.

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  1. Nov 4, 2018 #1

    Tyler P

    Tyler P

    Tyler P

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    This was my first rocket not from Estes and I really enjoyed the build! This is the maiden flight. All went well except for the failure and ejection of the motor mount.

    Looks like partially my fault and maybe partly the tube itself failing. Upper ring didn't look like it had enough glue but the bottom one did for sure. The motor tube blew out right at the ejection end of the motor.

    Will rebuild! No other damage and I really like this rocket!
     

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    Last edited: Nov 5, 2018
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  2. Nov 6, 2018 #2

    Tyler P

    Tyler P

    Tyler P

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    So it is now fixed. Picked up a pack of D/E Estes engine mounts, cut away the old tube out of the ply centering rings and reassembled the mount.

    I think what may have happened is that I actually put the glue too far in, therefore missing the upper ring with the majority of the glue.

    Anyhow, I reinstalled the mount in the airframe with 5-minute BSI epoxy and made sure to be generous with it. I even fillited the bottom ring.

    Can't wait to re-launch on an E12. It flew so nice.
     

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  3. Sep 3, 2019 #3

    Tyler P

    Tyler P

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    Planning on installing an Estes screw on retainer on this one. I keep popping engines out the back on ejection. The hook just isn't holding them in. The upper section comes out easily enough, so I don't think I'm getting too much pressure at that point, but the baffle might be doing it. The screw on retainer will do the trick.
     
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  4. Sep 16, 2019 #4

    Chris Brewer

    Chris Brewer

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    I just test flew (unfinished paint) the VA-B version today. I put a wrap of masking tape around the motor hook so it could not shift away from the motor. This was also my first non Estes kit since returning to the hobby in June. I flew on Estes D12-5 and it flew great. Now I need to touch up and decal. Iam going to attempt to post pics the first time here.[​IMG] [​IMG] [​IMG]
     
  5. Sep 16, 2019 #5

    Chris Brewer

    Chris Brewer

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    Obviously copying and pasting the URL from Google photos did not work
     
  6. Sep 16, 2019 #6

    Tyler P

    Tyler P

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    I think I have the VA-B in my build pile.
     
  7. Sep 16, 2019 #7

    Tyler P

    Tyler P

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    Edit, nevermind. That didn't work either, lol.
     
  8. Sep 17, 2019 #8

    Chris Brewer

    Chris Brewer

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    I am going to figure out the pictures!
    [​IMG]
    [​IMG] [​IMG]
    Yep, slightly convoluted but seems to work, let me know
     
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  9. Sep 17, 2019 #9

    Mugs914

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    Great pics!!!
     
  10. Oct 6, 2019 #10

    jqavins

    jqavins

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    Of course, the tape should work, but the screw-on gives a +2 cool factor.
     
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  11. Oct 7, 2019 #11

    Ez2cDave

    Ez2cDave

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    You might want to re-think that hearing protection headset . . .

    It's not that loud and she couldn't clearly hear you, in case something went wrong.

    Dave F.
     
  12. Oct 8, 2019 #12

    Chris Brewer

    Chris Brewer

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    At this point I have two choices do this activity with her, Or take away the air protectors and she will stay home. She stays by my side and told the rocket is in the air
     
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  13. Oct 8, 2019 #13

    Ez2cDave

    Ez2cDave

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    From your wording, I think i understand the situation . . . Spend every moment you can with her !

    Dave F.
     
  14. Oct 8, 2019 #14

    jqavins

    jqavins

    jqavins

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    Once she hears some composite motors with the ear protection on, she won't think so much of the BP one without them.
     
  15. Oct 8, 2019 #15

    Chris Brewer

    Chris Brewer

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    She is not a big fan of loud noises. The first time she launched I did not tell her there would be noise. I am just glad she still gets excited to go do stuff with me.
     
  16. Oct 8, 2019 #16

    Ez2cDave

    Ez2cDave

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    Must be mighty "tame" at your house on the 4th of July . . . LOL !

    Dave F.
     
  17. Oct 9, 2019 #17

    Chris Brewer

    Chris Brewer

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    We carry the air protectors in the back of the car wherever we go just in case. I took her to a monster truck show last summer the day after my wife decided to clean out the car. We saw one monster truck and then an angry dad went home.
     
  18. Oct 9, 2019 #18

    jqavins

    jqavins

    jqavins

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    When my daughter was 4 or 5 (and highly precocious regarding language) she liked fireworks for the sights but had trouble dealing with the noise. She asked one day if there's a way to get over the noise aversion. I was ready to say "No" when what came out of my mouth was "Systematic desensitization".
     
  19. Oct 9, 2019 #19

    Ez2cDave

    Ez2cDave

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    In other words, "you'll get used to it" . . . But, for now, embrace the "blast wave" - LOL !

    Dave F.
     

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