LOC-VII anyone got one?

Discussion in 'High Power Rocketry (HPR)' started by Pyropetepete, Dec 19, 2018.

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  1. Dec 19, 2018 #1

    Pyropetepete

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  2. Dec 20, 2018 #2

    seth_cooper

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    That's a nice looking rocket. Is it dual deploy?

    If not, I'd suggest you get the electronics bay kit to build with it. Even if you don't use an altimeter for the L2, you'll wish it had that capability in the future.

    Almost any of the LOC 5.54" or 7.675" kits would be great for L2.
     
  3. Dec 20, 2018 #3

    Buckeye

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    I like the looks of this kit, but at first glance it seems a bit much for 54mm motors, especially if you add the hulking 7.5" electronics bay. I'd be curious to know how it flies.
     
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  4. Dec 20, 2018 #4

    Pyropetepete

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    Not mine but taken from YouTube





    This was on a Aerotech K850 to 4,000 Ft.

    Again this was not mine.

    I would look at the option for DD.
     
  5. Dec 21, 2018 #5

    MikeyDSlagle

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    But it has the MMAS or Modular Motor Adaptor System. Can easily switch between 54mm, 75mm, or 98mm. Or clusters for that matter. Lots of possibilities. My new Mega Magg has the MMAS and just building it has me looking toward the LOC VII for clusters and airstarts. Aside from that, Loki does have a 54mm L and M.
     
  6. Dec 21, 2018 #6

    Oberon

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    It’s definitely a versatile rocket, but I think the point is that, as a big, heavy, draggy rocket, it’s not something that is going to fly well on the smaller 1-3 grain 54 mm motors. You really need full Js or K motors to make it shine. That K850 is a (retail) $200 motor that takes it to 4000’.

    Therefore, maybe not the best choice for someone just breaking into L2 unless they plan to / budget for flying fairly big motors.
     
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  7. Dec 21, 2018 #7

    Wallace

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  8. Jan 10, 2019 #8

    Pyropetepete

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    So no one here then
     
  9. Jan 10, 2019 #9

    Buckeye

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    Apparently not. Even if you wanted one, it might take a while to get it. There is a shortage of 7.67" tubes, according to buyrocketmotors.
     
  10. Jan 11, 2019 #10

    grouch

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    I can say this, when I end having the room I'll gladly ad one to my fleet. I am about 95% done with my LOC Goblin build and the way the interlocking fins and motor adapters work together is about as rough sexy as it comes. Having something Bruiser large that looks like a LOC 4 is too much to resist. Maybe I'll buy one for a house warming present when the time comes???
     
  11. Jan 11, 2019 #11

    jmuck78

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    I have one of these arriving tomorrow. I might consider doing a build thread on the LOC VII in addition to the build thread on the LOC Hawk (which doesn't use the MMAS).
     
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  12. Jan 11, 2019 #12

    DRAGON64

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    I have always loved the look of the LOC IV, so it goes without saying that I really like the LOC VII. The only thing that ever stopped me from buying the original was the fact that the fins hang below the body tube. Fear of breaking a fin off has kept me from ever buying the original design.

    Looking forward to a build thread if you decide to one. Looking over the link to the product, it looks as though LOC has provided nearly everything you need to successfully build a beauty!
     
  13. Jan 11, 2019 #13

    rockdoc

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    I've got a LOC VII which I am building and is mostly complete and is setup for dual deploy with the LOC avbay. It's a nice BIG rocket so it is easy to get to things when building. The adaptable motor mount from LOC is a great idea and though the kit came with a 54mm mount, I am already looking at getting additional kits for different configurations. I was at Bong and saw the flight of the LOC VII that the folks from LOC flew and it was a beautiful flight. I have also seen the LOC VII fly on a L1000 and the flight was perfect.In my build, I normally have my avbays as removable however with the size and length of the payload tube I opted to epoxy the avbay into the payload tube, since access would be easy and a few less holes to secure the rivets or screws whichever you prefer to use. I've also integrated shear pins into the booster and payload section to secure the nose cone and payload to the booster. The method I use is to use brass shims to act as a blade to cut the shear pins. I cut the brass shim to size and make a cutout inside the tube, where the shear pin hole is and glue the shim inside flush with the tube, then use some fiberglass over the plate to secure the shim. A light sanding and the tube has a nice fit and you don't have to worry about shear pins not shearing or the tube getting distorted. I also do use CA to reinforce the shear pin hole so it hardens the cardboard. I like the kit and am looking forward to it's first flight.
     
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  14. Jan 11, 2019 #14

    Theory

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  15. Jan 12, 2019 #15

    jd2cylman

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    Fear no more... I got my LOC IV many springs and summers ago(1998, I think...), back when it had a 29mm motor mount as standard. The fins did not got to the motor tube, just inside the airframe and had wood rods that you glued along the fin tabs. I've flown that a LOT back in the day (now with the JLCR, I might again...) and never even bent a fin... Get one and enjoy!!!
     
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  16. Jan 12, 2019 #16

    Ez2cDave

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    What is the designation of that 54mm Loki M ?

    I'm unaware of any 54mm M motors.

    Dave F.
     
  17. Jan 12, 2019 #17

    Ez2cDave

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    Jason,

    If you don't mind, could you please make a tracing of a fin, with dimensions, and upload it ? I'm thinking of doing a downscale version in 5.5" dia.

    Thanks,

    Dave F.
     
  18. Jan 12, 2019 #18

    dhbarr

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  19. Jan 12, 2019 #19

    jmuck78

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    Well, since the fins don't fit on a single sheet of 8.5 x 11, that might be easier than it sounds. I can give you specific dimensions, but a fin tracing might be difficult. Can you not just downscale the rocksim/openrocket file?
     
  20. Jan 12, 2019 #20

    Ez2cDave

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    Attached Files:

  21. Jan 12, 2019 #21

    jmuck78

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    Here's the unboxing from the LOC VII Arrival today:

    IMG_7434.jpg IMG_7435.jpg IMG_7437.jpg IMG_7439.jpg
     
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  22. Jan 12, 2019 #22

    Ez2cDave

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    I'm "old school" and don't use Rocksim, etc.

    If I can get accurate lengths, I won't need a fin tracing.

    If you can, please measure the fin and provide the lengths on this sketch.

    Thanks ,

    Dave F.

    LOC VII FIN -01.jpg
     
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  23. Jan 12, 2019 #23

    Ez2cDave

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    Very nice . . . Kit quality looks excellent !

    Dave F.
     
  24. Jan 12, 2019 #24

    dhbarr

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  25. Jan 12, 2019 #25

    jmuck78

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    Dave, no problem:
    R: 13.75 in
    L: 13.125 in
    T: 5.75 in
    W: 8.25 in
    B: 5.75 in
    C: 2.5 in
    S: 10.2
    A: 2.25 in (the measurement perpendicular to "C")
    D: 3.375 (hypotenuse of A and C)
     
  26. Jan 12, 2019 #26

    Rainmaker

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    I'll state up front that I'm a LOC fan boy, and I think they do incredible work and will go to extremes for their customers. I also know this is a "standard" design.

    But sharing measurements on kits that are readily available should be bad mojo in our hobby. We have so very few vendors that are willing to take the risk to satisfy our lust for speed and altitude that we should do whatever we can to support them.

    I'm sure the LOC guys can make any size you want.

    And maybe I'm speaking out of school and no one cares, I just got back into this game a year ago.
     
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  27. Jan 12, 2019 #27

    jmuck78

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    I didn't see an issue with sharing measurements for two reasons. One, LOC posts the Rocksim file for the LOC VII on their website, so anyone can retrieve the measurements from that if they wanted to. We also regularly and openly share sim files, which have the dimensions embedded. Two, the goal was to scale the fins to a size that LOC doesn't currently make (essentially a LOC-V), and while I'm sure LOC would custom make those fins if you ask them to, I don't know that they would object to allowing someone else to custom make scaled versions of their fins. If the goal here was to create a commercial enterprise around the 5 inch version, I would agree.
     
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  28. Jan 12, 2019 #28

    Ez2cDave

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  29. Jan 12, 2019 #29

    Ez2cDave

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    Jason,

    Excellent !

    How thick are they ? 3/8" ?

    Dave F.
     
  30. Jan 12, 2019 #30

    jmuck78

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    Yes, 3/8'' +/- 1/16".
     

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