LOC Precision 4" Iris

Discussion in 'High Power Rocketry (HPR)' started by Charlie1964, Sep 1, 2019.

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  1. Sep 1, 2019 #1

    Charlie1964

    Charlie1964

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    Hello everyone. My first post here. I live in NW Indiana just southeast of Chicago. I am a BAR! Looking at building a LOC Precision 4" Iris for my level 1 cert. I have been looking through the HP posts, and I've noticed that a lot of you are recommending the Madcow DX3. The reason I'm considering the Iris is because it would require a longer build time, and I could use DD for my level 2 cert later on. Go big or go home as they say. Thoughts and comments are welcome. Also looking for a club near by that isn't a 3 hour drive.
     
  2. Sep 1, 2019 #2

    djs

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    LOC Iris would be just fine for your L1 (and possibly L2).

    Clubs in your area:
    Michiana rocketry
    Tripoli Wisconsin (flies at Bong rec area)
    WOOSH rocketry (also flies at Bong)

    a little further- QCRS (flies at Princeton, IL)

    Note- for HPR rockets, you'll have to drive a bit farther...
     
  3. Sep 1, 2019 #3

    richP

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    Look at my signature :)

    A 4" version would be just fine.
     
  4. Sep 1, 2019 #4

    Cameron Anderson

    Cameron Anderson

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    Loc Iris was the first "big" rocket I ever bought. Good L1.
     
  5. Sep 2, 2019 #5

    Charlie1964

    Charlie1964

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    I went and ordered the kit. This kit is the Yank 4" Iris. Can't wait to get started.
     
  6. Sep 2, 2019 #6

    djs

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    Whereabouts are you in NW Indiana?
     
  7. Sep 2, 2019 #7

    Charlie1964

    Charlie1964

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    Valparaiso
     
  8. Sep 10, 2019 #8

    Jozef

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    I just checked out on the LOC web site. That 4 inch Yank Iris is a sweet package for $110. You made an excellent choice. LOC is coming up with a lot of new stuff as of late and their quality is top notch. Hope to see you do a build thread. Would like to see it fly at Midwest Power.
     
  9. Sep 11, 2019 #9

    jd2cylman

    jd2cylman

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    Still not Carl... ;-)

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    I built the Yank IRIS back in the day when they made it out of "flexible phenolic". I assume the current one is craft paper? Peel the glassine (white shiny layer) or sand the crap out of it so the glue can penetrate better.
    Looks like my pics are gone from the gallery. I didn't glass it and has flown on motors up to the K805G.
     
  10. Sep 12, 2019 #10

    Charlie1964

    Charlie1964

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    Yes, mine has the cardboard tube. Trying to decide what motor retainer to use.
     
  11. Sep 12, 2019 #11

    DAllen

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    You are about 30 minutes or so from the MIchiana Rocketry field. Just head up EB I-94 just over the Michigan line to exit 4 and get off at EB US-12 and drive to the other side of Three Oaks. I have a link to the club in my sig. See you this fall!
     
  12. Sep 12, 2019 #12

    Charlie1964

    Charlie1964

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    I definitely plan on heading up that way. Thank you!
     
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  13. Sep 12, 2019 #13

    jd2cylman

    jd2cylman

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    For 54mm, I prefer the Aero Pack flanged 54mm retainer. But the glue on one will work well too.
     
  14. Sep 12, 2019 #14

    Charlie1964

    Charlie1964

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    I am using a 38mm adaptor in the 54. I want to get my level 1 cert. Same thing for motor retainer, or?
     
  15. Sep 13, 2019 #15

    jd2cylman

    jd2cylman

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    Aero Pack 38 to 54 adapters work really well. Well worth the extra money over a cardboard adapter. Plus they nest. You could nest a 54mmt all the way down to a 24mm if the 24 mm motor had enough poop, or the rocket was light enough. :D
     
  16. Sep 13, 2019 #16

    Charlie1964

    Charlie1964

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    That's exactly what I need. Looked them up, I'll get one ordered today. Thank you very much!
     
  17. Sep 13, 2019 #17

    LOC

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    The Iris uses the same ring/adapter combo as the goblin. So it has z-clip retention standard, and the adapters work in all kits with the loc-n-ring system.
     
  18. Sep 26, 2019 #18

    comodelbuilder

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    It’s simple... I like rockets.

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    Here is my Mega Magg with the combo Dave is talking about. This is how the motor retention is used on the 4” IRIS. No need to buy anything unless you want to simply change how it looks. This example used the retention on a Aerotech 75mm casing. The other side shows how the “T-Nut” peeks through the hole and where the screw mounts the “Z-Clip”. I also have a 4” IRIS I need to complete. Of course to note the 4” IRIS is 54mm with the ability to adapt down to 38mm and 29mm. Let me know if you need any questions answered on any LOC builds. #theLOCmafia
     

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    Last edited: Sep 26, 2019
  19. Oct 13, 2019 #19

    Charlie1964

    Charlie1964

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    Making slow progress on the Iris. Wondering what I should do to the fin leading edges. Should I just leave them square, round them or have them beveled?
     
  20. Oct 13, 2019 #20

    richP

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    I rounded mine.
    Beveling is nice, but takes a lot of work to get even ones. Squared is fine, but wanted to make it look a little more refined.

    Don't know exactly why, but they whistle too. Definitely not done on purpose, but fun nonetheless.
     
  21. Oct 13, 2019 #21

    Charlie1964

    Charlie1964

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    Thanks. I will most likely round them, but wanted to see what others did.
     
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  22. Oct 13, 2019 #22

    DAllen

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    Like a lot of things in rocketry this is one of those there's no right answer. It's just a matter of personal preference. :D Don't forget to post some photos here.
     
  23. Oct 14, 2019 #23

    Ez2cDave

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  24. Oct 14, 2019 #24

    Ez2cDave

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    booster_bandw.jpg


    booster_color.jpg


    IRIS (2).jpg
     

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  25. Oct 16, 2019 #25

    comodelbuilder

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    It’s simple... I like rockets.

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    After seeing these pictures of the real ones I may have to repaint to include those details.

    Here is my 5.5” IRIS on a Loki L840 Cocktail at LDRS last month.
     

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  26. Oct 16, 2019 #26

    Charlie1964

    Charlie1964

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    That's a good looking Iris. Is that a LOC kit? I was hoping to have mine ready for next month, but a sudden career change has changed everything. I will find a launch next spring or summer to try for my L1.
     
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  27. Oct 16, 2019 #27

    comodelbuilder

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    It’s simple... I like rockets.

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    Yes it’s an unreleased LOC Precision Kit. Made with their newer flexible phenolic tubing. I stand on the fins for fun.
     

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  28. Oct 16, 2019 #28

    comodelbuilder

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    It’s simple... I like rockets.

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    I’m excited to see your progress man! I love me the IRIS! Frank Burke built one many years ago and when I saw the photo I had to have one!
     
  29. Oct 16, 2019 #29

    Charlie1964

    Charlie1964

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    I made a mistake on the middle CR. I read the instructions that said to put it at 5.5 inches from the end of the MT, (it didn't say glue it, that's where I made the mistake). After the epoxy had set, I went to try the fins and the RCR, that's when I realized my mistake.
    So I notched out the fins for the MCR. Everything seems to fit like it should.
    The fins and the RCR have not been glued in yet. Still need to do something with the leading edges.
     

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  30. Oct 16, 2019 #30

    Charlie1964

    Charlie1964

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    I used a piece of maple for the rear rail guide with the nut recessed and epoxied into the back of it. The forward rail guide is screwed into the FCR. I'm not sure how far apart these rail guides need to be, but for a 80" rocket they look too close together. Right now they are 15-1/2" apart.
     

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