Have any of you tried the screw-together couplers?

Discussion in 'Low Power Rocketry (LPR)' started by LW Bercini, Aug 15, 2019.

Help Support The Rocketry Forum by donating:

  1. Aug 15, 2019 #1

    LW Bercini

    LW Bercini

    LW Bercini

    Forum Supporter TRF Supporter

    Joined:
    Jun 15, 2011
    Messages:
    2,489
    Likes Received:
    18
    Gender:
    Male
    Location:
    Macon GA
    erockets sells a 2-part coupler that screws together. I just picked up the new USS Andromeda kit, and am thinking these couplers would be ideal. Transporting long skinny rockets is a pill.

    [​IMG]
     
  2. Aug 15, 2019 #2

    Scott Hala

    Scott Hala

    Scott Hala

    Forum Supporter TRF Supporter

    Joined:
    May 6, 2019
    Messages:
    125
    Likes Received:
    44
    Gender:
    Male
    Location:
    Huber Heights, Ohio
    I use one on my Mean Machine to switch between 24mm and 29mm motors.
     
  3. Aug 15, 2019 #3

    shreadvector

    shreadvector

    shreadvector

    Well-Known Member

    Joined:
    Jan 19, 2009
    Messages:
    8,850
    Likes Received:
    100
    What kind of pill? Like this? [​IMG];):D
     
  4. Aug 15, 2019 #4

    kuririn

    kuririn

    kuririn

    BARGeezer TRF Supporter

    Joined:
    Oct 3, 2016
    Messages:
    2,591
    Likes Received:
    659
    Gender:
    Male
    Location:
    Hawaii
    I picked up a few in the BT-60 size a few weeks ago. For the Andromeda you'll need a ST9/BT50 size which I don't see listed.
    They even have a Kevlar anchoring slot for your shock cord. They haven't flown yet, but I don't foresee any problems.
    Some close-ups for your edification:
    0815190548.jpg 0815190549.jpg
    Laters.
    EDIT: OK, I see that they have at BT-50 size in the "New" section but it's not listed in the Coupler section yet. ID for the BT-50 tube is the same as the ST9 tube: .950". ST9 tube is thicker, so OD is slightly larger.
     
    Last edited: Aug 15, 2019
  5. Aug 15, 2019 #5

    kitbasher99

    kitbasher99

    kitbasher99

    Well-Known Member

    Joined:
    Jun 10, 2012
    Messages:
    82
    Likes Received:
    10
    Because of the size difference between the ST7/BT20 and the ST9/BT50 tubes, we recommend that you use epoxy for your adhesive. Other than that they should be fine. The shock cord mounts the same on the USS Andromeda.
     
  6. Aug 15, 2019 #6

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

    Well-Known Member

    Joined:
    Nov 17, 2013
    Messages:
    904
    Likes Received:
    19
  7. Aug 15, 2019 #7

    Zeus-cat

    Zeus-cat

    Zeus-cat

    Well-Known Member

    Joined:
    Mar 14, 2009
    Messages:
    4,156
    Likes Received:
    357
    The guys at eRockets worked pretty hard on getting these just right. They work very well.
     
  8. Aug 15, 2019 #8

    neil_w

    neil_w

    neil_w

    When in doubt, add more rocket TRF Supporter

    Joined:
    Jul 14, 2015
    Messages:
    6,690
    Likes Received:
    986
    Location:
    Northern NJ
    It says they’re PLA printed. I’d be careful with them in hot launch environments.
     
  9. Aug 15, 2019 #9

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

    Well-Known Member

    Joined:
    Nov 17, 2013
    Messages:
    904
    Likes Received:
    19
    They look great, I don’t doubt they work well, only that they appear to be a straightforward design.
     
  10. Aug 16, 2019 #10

    BBowmaster

    BBowmaster

    BBowmaster

    Well-Known Member

    Joined:
    May 30, 2017
    Messages:
    128
    Likes Received:
    38
    I need to snag a couple. I was gifted an old beat-up semi-flyable Mean Machine and I’ve been considering how to break it down for transport once it’s fixed up.
     
  11. Aug 16, 2019 #11

    cwbullet

    cwbullet

    cwbullet

    Obsessed with Rocketry Staff Member Administrator TRF Lifetime Supporter Global Mod

    Joined:
    Jan 24, 2009
    Messages:
    22,502
    Likes Received:
    1,379
    Gender:
    Male
    Location:
    Glennville, GA
    I like the idea. This could be a great contest.
     
  12. Aug 16, 2019 #12

    sjh1

    sjh1

    sjh1

    Well-Known Member

    Joined:
    Nov 20, 2011
    Messages:
    98
    Likes Received:
    3
    I love this idea. I was also thinking that is could be used on a fin can to use multiple motor sizes!
     

Share This Page