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Thread: The Fractal

  1. #1
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    The Fractal

    I couldn't figure out the proper gallery to post this pic, so I'm putting it here.

    I had this brainstorm of a concept of using a curved set of tubes to create 2 fins. My "old-timer's" intuition told me it would be stable, but I had my doubts about the structural integrity during boost. So I create a prototype to test it out.

    In that it was a prototype, I concentrated on strengthening the tube assemblies, and did not attempt to make it a really clean build.

    Well, the test flights were far better than my expectations. This bird flies as straight as an arrow, and much to my surprise, has no spin during boost. The best adjective I can come up with to describe the flights is "graceful" So, it's a keeper!

    So then I had to do what I could to remedy the messy construction, and try to put a decent finish on her.

    I named her "The Fractal" because the curves with graduated tube sizes remind me of certain fractal patterns. Besides, that is a much cooler name than "Dueling Pan Pipes"



    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


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  2. #2
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    Wow. now that is a different look. I love it. and the name is incredible. Well done. I would love to see a plan. What were your angles or did you just eye ball it.
    Steve

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  3. #3
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    Very unique and interesting. I like it

  4. #4
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    Very nice and quite clever. I was trying to get an idea of size but in your pic I couldn't see anything but the cool rocket to compare it to for scale. Are the wings, made from cardboard tubes? What size motor did you fly it on?
    Russell Westergaard
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  5. #5
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    Very, VERY, cool!

    Cheers,
    Michael

  6. #6
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    Wow! That's awesome. It must have taken a looong time to glue on all of those tubes!

  7. #7
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    Very cool looking! It does look elegant and graceful, so it's not surprising that it flies that way.

    I do suggest you reconsider the name, though. If you did a big enough upscale, you could probably get a life-size Zamfir wrap for the airframe:

    NAR, TRA L2
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  8. #8
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    Quote Originally Posted by Rrwjr View Post
    Very nice and quite clever. I was trying to get an idea of size but in your pic I couldn't see anything but the cool rocket to compare it to for scale. Are the wings, made from cardboard tubes? What size motor did you fly it on?
    It is made from all low power parts, with a 24mm MMT for C through E impulse. The airframe is 18" of BT-60. Below is a picture I took just after I finished construction, propped up on a sofa, which give you a better idea of size. At this angle, you can't tell that the fins curve, but it does give you a good view of how the fins angle upward.

    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  9. #9
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    Quote Originally Posted by apburner View Post
    Wow. now that is a different look. I love it. and the name is incredible. Well done. I would love to see a plan. What were your angles or did you just eye ball it.
    Steve
    This the closest thing I have for a plan. CAD-meister Gary Byrum, figured out what combination of tube diameters would create a 180* arc around a 4" diameter. I cut all the tubes to length and then laid them side by side around, and up the side of a 4" diameter coffee can. The run of tubes actually ended up taller than the coffee can. I had to run a collar of paper around the can to position the last 4, smallest diameter tubes.

    Click image for larger version. 

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    Last edited by LW Bercini; 8th August 2013 at 02:25 PM.
    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  10. #10
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    Bravo on a cool and unique design! I would have guessed that it would have spun in flight.
    Dick Stafford
    The member formerly known as the Pointy-Haired Moderator.
    The Original Rocket Dungeon
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  11. #11
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    WOW !! That's what I call an original and very creative design. Nicely done my friend
    Anyboby see that caboose go by----I lost my train of thought again! There's leaders and managers, those who can't lead just manage

  12. #12
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    Oh sure,that will work..nice job! on
    Does it whistle dixie on the way up?
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  13. #13
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    Quote Originally Posted by Scotty Dog View Post
    Does it whistle dixie on the way up?
    Around here, EVERYTHING whistles dixie!
    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  14. #14
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    Quote Originally Posted by LW Bercini View Post
    Around here, EVERYTHING whistles dixie!
    NAR 90998
    SAM 0322
    Give Blood!
    Everything there is to know , is to know what you don't know.
    Somedays its hard to stay centered on being eccentric.
    I like Fat-Bottomed Rockets
    Temple of the Dog

  15. #15
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    Hey, you going to fly that baby again next weekend at Commerce?

  16. #16
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    Quote Originally Posted by LW Bercini View Post
    Besides, that is a much cooler name than "Dueling Pan Pipes"
    NAR 91107, Level 2

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  17. #17
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    Quote Originally Posted by Chevis View Post
    Hey, you going to fly that baby again next weekend at Commerce?
    Sorry, I won't be able to make it to Commerce
    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  18. #18
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    This is the COOL end of the creative rainbow! I love it!

  19. #19
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    A very cool, multi-tubular two fined rocket. Paint each tube a color of the rainbow, a blue and white checkerboard body tube, a sparkly red nose cone and call it "Somewhere Over the Rainbow," the chicks will love it! And then they say two fined rockets are dynamically unstable. Toto, we ain't in Kansas anymore!
    Last edited by Daddyisabar; 7th August 2013 at 06:04 PM.

  20. #20
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    Zany. I like it.

  21. #21
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    Mucho coolo!
    It is amazing what you can do when you don't have a choice.

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  22. #22
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    Hey LW, Ya think I might need to get an up scale drawing started? And just for kicks, have a couple of small forward fracktillian fins? You could use a tomato paste can for those.
    Thinking outside the box is normal for me. Went inside the box once and got claustrophobic.
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  23. #23
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    Dueling Pan Pipes would have been plenty cool, but Fractal....that is outstanding. Very creative idea, congrats.
    John

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  24. #24
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    What an original and interesting design!
    AERO-PAC, ROC, LUNAR (TRA & NAR)
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  25. #25
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    Quote Originally Posted by jflis View Post
    This is the COOL end of the creative rainbow! I love it!
    Thanks Jim! I had considered entering it in your DOM, but thought it was too "zany" for consideration.
    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  26. #26
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    Quote Originally Posted by hornet driver View Post
    WOW !! That's what I call an original and very creative design. Nicely done my friend
    Thank you. Ever since beginning the hobby in the late 60s, I have tinkered with different ways to induce stability. Some were quite successful, such as the pyramid rocket. Others, not so much (pinwheels comes to mind).
    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  27. #27
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    Quote Originally Posted by Gary Byrum View Post
    Hey LW, Ya think I might need to get an up scale drawing started? And just for kicks, have a couple of small forward fracktillian fins? You could use a tomato paste can for those.
    Gary, you are a baaaaad influence.
    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  28. #28
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    Quote Originally Posted by LW Bercini View Post
    Thanks Jim! I had considered entering it in your DOM, but thought it was too "zany" for consideration.
    I think he will let in zany rockets. He allowed my Dornier 217 with its whack job canted motors up front.

  29. #29
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    Yes, it flies. I flew it at the Freedom Launch last weekend and Tom Binford got it on video

    LW Bercini
    TRA #00134 / NAR #18121
    Seeing "the box" from the rear view mirror since 1970


    I don't measure my enjoyment of the hobby in Newton-Seconds

    It never ceases to amaze me how so many otherwise intelligent people have such poor reading comprehension.

  30. #30
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    Excellent work, LW! The proof is in the flying.


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