geometric rocket challenge - quarterly challenge - first quarter

Discussion in 'Contests' started by mbecks, Jan 9, 2017.

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  1. Feb 2, 2017 #61

    Woody's Workshop

    Woody's Workshop

    Woody's Workshop

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    Glad to see jump in John.
    Technically, there are round areas that may disqualify it.
    But I like it!
     
  2. Feb 2, 2017 #62

    JumpJet

    JumpJet

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    This is in fact a small world. Just this morning I started design work on a new Estes SciFi kit that will hopefully have all angular sides to it. It will be completely different from my Asteroid Hunter. I might not even have a plastic blow molded nose cone as well, so it will be a true builder kit, if I ever finish the design.

    John Boren
     
  3. Feb 2, 2017 #63

    blackbrandt

    blackbrandt

    blackbrandt

    That Darn College Student

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    Glad everyone is doing well! Depending on the number of entries, that will change what type of poll I use. :)
     
  4. Feb 2, 2017 #64

    neil_w

    neil_w

    neil_w

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    Enter it in the contest! ;)

    (The AH would be disqualified for the section of round BT between the nose and body, I think)
     
  5. Feb 2, 2017 #65

    Woody's Workshop

    Woody's Workshop

    Woody's Workshop

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    Unless I can secure funds for basswood strips, I won't be able to join in.
    Time is running out on me very fast.
     
  6. Feb 2, 2017 #66

    SpaceManMat

    SpaceManMat

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    looks pretty sweet. How big are planning on making it?
     
  7. Feb 3, 2017 #67

    JumpJet

    JumpJet

    JumpJet

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    That image is of the Estes Asteroid Hunter which has been out for around six years now and is now discontinued.


    John Boren
     
  8. Feb 4, 2017 #68

    Screaminhelo

    Screaminhelo

    Screaminhelo

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    Don't count on me being there at the finish line on this one. With my deadline already shifted left and Pinewood Derby fast approaching, this one will not be getting the attention that a couple of projects that I am doing with my boy. It will remain on the bench but on a low priority.
     
  9. Feb 4, 2017 #69

    TangoJuliet

    TangoJuliet

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    I won't have the time to dedicate to my idea either - too many projects going on at once. At some point I'll pursue it, but not now, in this contest. :(
     
  10. Feb 4, 2017 #70

    BuiltFromTrash

    BuiltFromTrash

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    Too cold for me to really do anything.
     
  11. Feb 4, 2017 #71

    Incongruent

    Incongruent

    Incongruent

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    Hahaha! 3 down!

    :grin:
     
  12. Feb 7, 2017 #72

    SpaceManMat

    SpaceManMat

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    no time like the present to build an upscale.
     
  13. Feb 8, 2017 #73

    mbecks

    mbecks

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    I wish I was as talented at this as you guys. Most of my rockets are much rougher.
     
  14. Feb 8, 2017 #74

    GrouchoDuke

    GrouchoDuke

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    I have my rocket done except for the recovery harness. Can't wait to fly it!
     
  15. Feb 9, 2017 #75

    SpaceManMat

    SpaceManMat

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    no time like the present to practice.

    Pics please
     
  16. Feb 9, 2017 #76

    SpaceManMat

    SpaceManMat

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    So I've got some paint on it for this weeks trial flight.
    [​IMG]

    Its put on too much weight for my liking, most of which is towards the rear. Will aim for a stability margin of 1.05 this time with a D24. Rod speed is going to be slower, making me just a bit nervous. If it works out I'll be adding decals and going for a central C6 with 4x B6 cluster.
     
  17. Feb 13, 2017 #77

    Scotty Dog

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  18. Mar 4, 2017 #78

    mbecks

    mbecks

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    I haven't forgot about this contest. I will be messaging blackbrandt to get help on setting up the thread to post your entries and then to cast your votes. stay tuned. hopefully we get a bit of participation and its worth doing another.
     
  19. Mar 5, 2017 #79

    BABAR

    BABAR

    BABAR

    Builds Rockets for NASA TRF Lifetime Supporter TRF Supporter

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  20. Mar 29, 2017 #80

    neil_w

    neil_w

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    So... did anyone other than BABAR actually complete a build?
     
  21. Mar 29, 2017 #81

    GrouchoDuke

    GrouchoDuke

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    I finished one about a month ago, but I haven't flown it yet. It's a 3d printed rocket made with PETG. It's an 18mm min-diameter design that stands 15" tall and weighs about 2.5oz (motor not included). I planned on flying it on a C6-5, but smaller motors should work too. The motor's friction fit with a little bit of tape. Recovery is a streamer & rubber band style shock cord.

    I made it in three main parts: the fins & lower body, upper body, and nosecone. It has 7 fins and they're all portions of heptagons. The outer cross section of the body is a heptagon. I first made a 7-sided Von Karman nosecone, but after reviewing the rules, I remade it as a 7-sided conical so that it'd stay flat sided. The lower body was printed with the fins attached. The lower & upper body were glued together with a 3d printed coupler and epoxy. To get a good separation of the nosecone, I sanded the inside of the body tube and the outside of another 3d printed coupler. There's a 3d printed motor thrust ring that's epoxied in place inside the lower body. The launch rod guide is 3d printed on the lower body.

    Here are time lapse videos of each of the main parts being printed:







    Here's the lower body & fins right off the printer:

    IMG_7669-2.jpg

    Here's the finished rocket:

    IMG_8297-crop.jpg

    I planned on flying it at our club's last high power launch, but I kept busy with my bigger rockets instead. :) I'll try to fly it in about 3 weeks at the next high power launch day.

    EDIT: Here's the ork file: View attachment Heptagon Rocket.ork
     
  22. Mar 29, 2017 #82

    neil_w

    neil_w

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    Well golly that's pretty cool. :cool:
     
  23. Mar 29, 2017 #83

    GrouchoDuke

    GrouchoDuke

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    :) It was fun to design & make!
     
  24. Mar 30, 2017 #84

    dhbarr

    dhbarr

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    Design and parts yes, a bit. Build & fly, sadly no. I think I'll stick to the summer build off, just not enough rocket time until my shop situation improves.
     
  25. Mar 30, 2017 #85

    SpaceManMat

    SpaceManMat

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    My X Wing was flown again for the 3rd time at the QRS 10th Anniversary Open Day Launch .


    This time it flew with a cluster of 5 SCR motors, a central C6-5 with 4 outboard B6-4.
    That's the equivalent of a 28E14 with a peak thrust of 56N resulting in about 18Gs of acceleration.
    unfortunately my decals were not ready due to the arrival of a baby girl for my decal guy.
    All 5 motors light at launch and again it flew extremely straight even with a bit of wind.


    Enjoy the video, watch for the 4 outboard ejection charges going off just before apogee.


    This is a mockup of some of the decals to see what it will look like.
    [​IMG]
     
  26. Mar 30, 2017 #86

    GrouchoDuke

    GrouchoDuke

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    That X-Wing launch is one of the coolest things ever. Awesome!!
     
  27. Apr 1, 2017 #87

    BuiltFromTrash

    BuiltFromTrash

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    Here is my entry: The Cheez-It Rocket!

    The first flight was a success!
    Using 2x B4-4 1x D12-0.
    Old build thread: http://www.rocketryforum.com/showthread.php?128038-The-Cheese-It-Thread

    Pictures or it didn't happen!
    IMG_20170330_143043.jpg
    IMG_20170330_143142.jpg
    IMG_20170330_143207.jpg
    IMG_20170330_163822.jpg

    You Tube video:
    [video]https://youtu.be/25_WuEn1kEY[/video]

    Sorry I could not capture the whole flight, it flew straight then did a loop that ended in the parachute being ejected by the engines. It would totally make it past the RSO at a club launch (I am not a member of one yet), right???

    I have a Toblerone rocket in the works... ;D
     
  28. Apr 1, 2017 #88

    neil_w

    neil_w

    neil_w

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    Awesome. That thread was one of the first ones I remember when I became a BAR, glad to see it finally come to fruition!
     
  29. Apr 1, 2017 #89

    GrouchoDuke

    GrouchoDuke

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    Dude, that Cheez-It rocket is awesome!
     
  30. Apr 1, 2017 #90

    BuiltFromTrash

    BuiltFromTrash

    BuiltFromTrash

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    Wow neil_w that's cool! Thanks it has been awhile in the making. I need to post to the build thread still, I fixed a bunch of things to make it fly.
     

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