Estes Colossus Fins

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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?
 

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.
 

Lance Dean

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Thanks, just by looking closer at the two of them I can tell they are different dimensions.
 

astronwolf

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The fins on the Colossus are (were) the same as the ones on the Maxi Alpha 3.
Literally, the same. Not just the same size.

If you are considering cloning the Colossus, go with wood fins that have the same profile.
 

shreadvector

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Just remember to never let your Colossus talk to your Guardian.
 

Lance Dean

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Just for future reference the Executioner fins are not the same dimensions as the Colossus fins.
 

astronwolf

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Be very glad that the Colossus fins aren't Kronos fins.
 

Red7Fifty

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Executioner Fins are DIFFERENT shape than Colossus Fins. The Executioner fins are longer and more sweptback.
 

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
 

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.
 

Red7Fifty

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They looked similar, but I hadn't actually compared them....I'll get to it.....
 

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.
 

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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