Tubing Conundrum

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Kruegon

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Cardboard. Heavy-wall. Spiral wrapped. 8.875" OD x 55" L. As much as you want for free.

If this scenario was put in front of you, what would you do?
 

chris m

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I would be building a 8.8 inch rocket
 

chris m

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Or build your nose cone . Different ways of doing it
 

dhbarr

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Or build your nose cone . Different ways of doing it
With infinite free tubing, I'd be measuring up a six-segment cutcone. Another chunk cut down into coupler, make a giant tuber from scrap.
 

dhbarr

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Like a fat walrus like two foot tall
Sadly I do not have a large supply of mega tubes, but this design keeps popping into my head.

Is there a cutcone calculator out there ( e.g. feed in the OD, desired length, and number of gores )?
 

chris m

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In that picture there is a paper you can download . I will check for a calculator
 

chris m

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Do a search here for project paper has a lot
 

chris m

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Rocket shoppe building tips has a calculator
 

chris m

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Blocklayer.com has one and can print full size just cut to 1/6 th of the pattern
 

dhbarr

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Blocklayer.com has one and can print full size just cut to 1/6 th of the pattern
Yeah, I was thinking someone had a tube-to-elliptical cutcone calculator where you finish off with a disc over the star at the top and end up with much lower profile ridges.

Maybe I was misremembering blimp gore.
 

Kruegon

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Sell it. Assuming an unlimited and unchoked supply.
I have considered that. The tubes are not "perfect" but they're pretty great. Biggest issue I've seen is couplers.

My biggest obstacle is transportation from the acquisition site to home. And then there's the idea of shipping it to anyone that isn't local. That'd be an issue.
 
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Incongruent

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I have considered that. The tubes are not "perfect" but they're pretty great. Biggest issue I've seen is couplers.

My biggest obstacle is transportation from the acquisition site to home. And then there's the idea of shipping it to anyone that isn't local. That'd be an issue.
You can make a coupler by slotting part of the tube and joining the ends. John Coker has a tutorial.
 

cavecentral

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You can make a coupler by slotting part of the tube and joining the ends. John Coker has a tutorial.
Agreed. I do this for all my hand made fiberglass tubes that don't match anything that is for sale. Usually the mandrel I roll the tube on is heavy cardboard or PVC and not suitable for a coupler.
 
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