HAMR 38 vs aeropack

Discussion in 'The Watering Hole' started by HVArcas, Feb 24, 2020.

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  1. Feb 24, 2020 #1

    HVArcas

    HVArcas

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    So I am building a PML rocket. Staying in the family suggests using a HAMR 38 retainer, which frankly looks nice.

    But also the aeropack 38 looks great at significantly less cost, and also works great with their adaptors. Is there any reason to go PML over aeropack?
     
  2. Feb 24, 2020 #2

    Speaknoevil

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    I've had/used both. Pretty much the same thing. If you order the Aeropack you will need the -P version (assuming you have a phenolic motor mount tube).
     
  3. Feb 24, 2020 #3

    timbucktoo

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    Biggest difference PML has fine threads, Aeropack has course threads.
     
  4. Feb 24, 2020 #4

    Nytrunner

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    There's also Giant Leap's Slimline retainers. Real slim, look good
     
  5. Feb 24, 2020 #5

    CoachSteve

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    And Aero Pack Tail Cone retainers - so cool
     
  6. Feb 25, 2020 #6

    H_Rocket

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    One thing to consider is that they are not cross compatible. So if you misplace the ring from one, you can't use one from another rocket unless you have a similar one with you.
     
  7. Feb 25, 2020 #7

    heada

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    I have dozens of Aeropack retainers from 29mm to 75mm. I recently installed my first Aeropack 38mm to 3in tailcone. Yeah, very cool stuff!
     
  8. Feb 25, 2020 #8

    CoachSteve

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    Yeah - here is the AeroPack 3" to 38mm - so cool:
    [​IMG]
     
  9. Feb 25, 2020 #9

    MikeyDSlagle

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    Like mentioned, the HAMR has fine threads vs Aeropack course threads. HAMR also has a different texture, diamond shaped gnarls vs Aeropack's fine lines. To me the HAMR is nicer but it's personal preference. The Aeropack is a bit more versatile with different sizes for different MMT manufacturers and one ring fits all the sizes.
     
  10. Mar 4, 2020 #10

    HVArcas

    HVArcas

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    great point.. given I have aeropack everywhere else probably best to stick to that, not to mention the availability..
     
  11. Mar 4, 2020 #11

    HVArcas

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    hah is that a green madcow twitch? got one on my workbench..
     
  12. Mar 4, 2020 #12

    CoachSteve

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  13. Mar 4, 2020 #13

    HVArcas

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    oh not at all, i think my original Q was well answered. i will definitely check yours out as I have not even started mine yet.

    good luck with the fiberglass! Do not be intimidated, simply listen to those who have done it before and it will be awesome.
     
  14. Mar 4, 2020 #14

    CoachSteve

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    The build went great - super smooth - all the great advise and help here made it easy - cant wait to send it up this summer. I will be flying stepped down to 29mmn for now but this will be my level one rocket when I get the means to go for cert :)
     
  15. Mar 4, 2020 #15

    CoachSteve

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    I will say though that the addition of the tail cone in this relatively short rocket significantly impacted the amount of nose weight required to make it stable. With the tail cone I required 200g lead in the nose, had I built it with a standard Aero Pack retainer (flat tail) I could have dropped to 100g. (Open rocket Sims ) - Food for thought
     
    Last edited: Mar 5, 2020
  16. Mar 4, 2020 #16

    MikeyDSlagle

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    You put 200 oz in a Twitch? Holy cow! And you are flying it on 29mm?
     
  17. Mar 4, 2020 #17

    CoachSteve

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    yeah 29 - its even less stable with a 38 in it ;)
     
  18. Mar 5, 2020 #18

    H_Rocket

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    Twelve and a half pounds of nose weight? Is that a typo? What 29mm motor are you using and where the heck do I buy one?
     
    grouch likes this.
  19. Mar 5, 2020 #19

    CoachSteve

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    LOL - 200g- not 200oz that would be a ton of weight. :)
    I edited above - thanks for calling me out on that :)
     
    Last edited: Mar 5, 2020
  20. Mar 5, 2020 #20

    MikeyDSlagle

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    Whew.
    That's better.
     

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