New Glenn(first post)

Discussion in 'Low Power Rocketry (LPR)' started by Ryan Miller, Mar 31, 2019.

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  1. Apr 10, 2019 #31

    Ryan Miller

    Ryan Miller

    Ryan Miller

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    Alright, so this is what I came up with. I decided to attach the MMT to the external coupler(male). I could've put the male on the inside and attached the MMT to the rocket body but I didn’t really want the threads sticking out of the bottom for display. I didn’t figure it was a huge deal given it probably won’t ever see anything bigger than a B. It’s pretty solid too. Just wanted to ask your guys opinion on it and see if you guys could think of any problems with this I couldn’t.
    E71713AE-1AC9-4C17-814E-148F4942D9DA.jpeg 8D412E60-2E6E-4C5E-9D24-36C45BBAF03B.jpeg
     
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  2. Apr 10, 2019 #32

    Nytrunner

    Nytrunner

    Nytrunner

    Master of Rivets

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    Way more stable!

    What's the all up weight sans-motor?
     
  3. Apr 11, 2019 #33

    Ryan Miller

    Ryan Miller

    Ryan Miller

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    115g
     
  4. Apr 11, 2019 #34

    neil_w

    neil_w

    neil_w

    Fiddly bits enthusiast TRF Supporter

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    Be aware that you're right at the edge of the weight limit for a B. Go for the short delay version (B6-2) if you have a choice.

    Fins look good.
     
  5. Apr 11, 2019 #35

    Tobor

    Tobor

    Tobor

    Get your peanuts....

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    That is a neat solution! Kudos to kuririn for pointing you in the right direction.
     
  6. Apr 11, 2019 #36

    jqavins

    jqavins

    jqavins

    Joseph Avins

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    Or bite the bullet and use a C6 (slightly better peak thrust) or Q-Jet C12 (much better). Why only a B? If it's fear for your baby's safety (quite understandable) then it's important to remind yourself that an underpowered motor put's her at more risk than an overpowered one. Overpowered means a long recovery walk, and danger from rocket eating trees. Underpowered may mean insufficient speed off the launch rail resulting in unstable flight, and/or insufficient altitude for good 'chute deployment, and consequent crash. And C motor will take care of hte altitude, and improved peak thrust will help with speed off the rail.
     
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  7. Apr 12, 2019 #37

    kuririn

    kuririn

    kuririn

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    Only thing left is to check for stability (swing test or Open Rocket) and add nose weight if needed.
    +1 on the Quest Q-Jet. The black smoke makes for great launch pictures and videos.
     

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