Estes Colossus Fins

Discussion in 'Low Power Rocketry (LPR)' started by Lance Dean, Sep 18, 2019.

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  1. Sep 18, 2019 #1

    Lance Dean

    Lance Dean

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    Does anyone know if the fins on the Estes Colossus the same dimensions as the fins on the Estes Executioner?
     
  2. Sep 18, 2019 #2

    kuririn

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    The fins on the Colossus are (were) the same as the ones on the Maxi Alpha 3.
    The Executioner fins were through the wall plywood.
    The Colossus/Maxi Alpha 3 fins were plastic.
    Don't know if the dimensions were the same but templates for the Executioner are here:
    https://web.archive.org/web/2011112...rg/JimZ/estes/est1951_Executioner/est1951.pdf
    And templates for the Maxi Alpha 3 are here:
    https://www.oldrocketplans.com/estes/est1321/est1321.pdf
    You can print both out and compare.
    Related thread here:
    https://www.rocketryforum.com/threads/estes-colossus-1326-fin-drawing.149852/
    Laters.
     
  3. Sep 18, 2019 #3

    Lance Dean

    Lance Dean

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    Thanks, just by looking closer at the two of them I can tell they are different dimensions.
     
  4. Sep 19, 2019 #4

    astronwolf

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    Literally, the same. Not just the same size.

    If you are considering cloning the Colossus, go with wood fins that have the same profile.
     
  5. Sep 20, 2019 #5

    shreadvector

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    Just remember to never let your Colossus talk to your Guardian.
     
  6. Sep 22, 2019 #6

    DMC12

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    And the sound of crickets...........
     
  7. Sep 23, 2019 #7

    shreadvector

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    Lynell got it instantly when I told her verbally after the launch on Saturday.
     
  8. Sep 26, 2019 #8

    Lance Dean

    Lance Dean

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    Just for future reference the Executioner fins are not the same dimensions as the Colossus fins.
     
  9. Sep 26, 2019 #9

    astronwolf

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    Be very glad that the Colossus fins aren't Kronos fins.
     
  10. Oct 5, 2019 #10

    Red7Fifty

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    Executioner Fins are DIFFERENT shape than Colossus Fins. The Executioner fins are longer and more sweptback.
     
  11. Dec 24, 2019 #11

    ROCKETDAWG

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    After alot of research seems to me that maxi alpha3 are exactly correct for Colossus. Here's my take in ttw ply. IMG_20191223_175054816.jpg
     
  12. Dec 24, 2019 #12

    Red7Fifty

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    That is correct. I had one in the 1980's, and a NIB one now. Plus, I've had the Maxi-Alpha 3. Currently, you can grab Black Versions from the "Red Flare" kit #1954, currently available from Estes, but I suspect it will be out of production soon....so I nabbed a dozen kits to make some Colossus Clones.
     
  13. Dec 24, 2019 #13

    ROCKETDAWG

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    IMG_20191223_185112083.jpg
    Redflare fins are different. Shorter at root and edge.
     
    Last edited: Dec 24, 2019
  14. Dec 24, 2019 #14

    Red7Fifty

    Red7Fifty

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    They looked similar, but I hadn't actually compared them....I'll get to it.....
     
  15. Dec 24, 2019 #15

    Red7Fifty

    Red7Fifty

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    I'm RIGHT, they ARE Identical. Shown overlaid onto Vintage NIB Colossus Fins, and again next to a Clone with Balsa Fins that I build several years ago.
    (So, you were wrong).
    :)
    TRUMP 2020!
     

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  16. Dec 24, 2019 #16

    ROCKETDAWG

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    So the Maxi Alph3 are incorrect?
     
  17. Dec 24, 2019 #17

    samb

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    kuririn answered the question on September 18th. The Colossus was a stretched Maxi Alpha III. Exact same fin can, part number 33210 (https://estesrockets.com/instructions/). While the Red Flare fins have a different part number, 33389, the pictures posted by Red7fifty sure look the same. It's not unheard of for Estes to change part numbers for the same part over the years.
     
  18. Dec 24, 2019 #18

    ROCKETDAWG

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    The scans from the Maxi Alpha 3 do not match the current red flare. So everybody is correct if +/- 1/4" is a match.
     
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  19. Dec 24, 2019 #19

    Alan15578

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    So which set has the higher flutter speed?
     

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