#241  
Old 09-05-2019, 11:07 PM
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davetherocketguy davetherocketguy is online now
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Sooooo the rebuild has begun and it is going to be a complete rebuild with completely different materials. First, I got a 5' section of 38mm G12 fiberglass tubing for the center pole. This will serve as the main structural part to the whole thing so I didn't mind spending $70+ on that. This tube will not only serve as the motor mount but will also house the electronics. I am going to depart with the external hill-billy designed electronics bay and this will look much better. Today Amazon delivered a pair of 39.5" extruded carbon fiber rods. They're bigger diameter than the 1/2" oak dowels I was using as the spokes for the basket but they sure seem MUCH stronger. I also noticed my supply of dowels are starting to warp. CF will definitely NOT do that. And as an added bonus they are hollow and weigh about 55% less per foot than the dowels which is a huge plus. The oak dowels come in around 1.28 oz/ft and the CF rods are 0.7 oz/ft.

The big challenge now is the new design directive I've given myself...It needs to come apart (somehow) so that it is easier to transport. Having the bottom basket and the upper portion that holds the chains removable in some way that does not compromise the overall strength is key. I have a few ideas rolling around in my head so once I settle on how I am going to do that I can start buying the remaining materials...I would really like to see this fly at our clubs November launch.

This version should be far more stout so if someone wants to toss some plastic - as hard as they want even - this should hold up just fine. I'll still be using cheap plastic chains so those might shatter but I really don't care about that. Those are very easy and cheap to replace.
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  #242  
Old 09-06-2019, 08:58 AM
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ericb45696 ericb45696 is offline
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" This version should be far more stout so if someone wants to toss some plastic - as hard as they want even -"

/starts planning trip


(jk, I wish )

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  #243  
Old 09-06-2019, 10:14 AM
jakebake91 jakebake91 is offline
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Quote:
Originally Posted by davetherocketguy View Post

The big challenge now is the new design directive I've given myself...It needs to come apart (somehow) so that it is easier to transport. Having the bottom basket and the upper portion that holds the chains removable in some way that does not compromise the overall strength is key. I have a few ideas rolling around in my head so once I settle on how I am going to do that I can start buying the remaining materials...I would really like to see this fly at our clubs November launch.

.
What is the internal diameter of your main tube?
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  #244  
Old 09-06-2019, 10:16 AM
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davetherocketguy davetherocketguy is online now
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Originally Posted by jakebake91 View Post
What is the internal diameter of your main tube?
38mm. This is the standard for a lot of G through J rocket motors.
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  #245  
Old 09-06-2019, 11:00 AM
jakebake91 jakebake91 is offline
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Gotcha. Wasn't sure if 38mm was id or od. So... could you use some kind of a plastic plug with a male and female threaded end glued into the halves of the tube, making it able to unscrew in half? I was thinking about pool cues that break down. My 1st thought was aluminum, but I remember you had said no metal.
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  #246  
Old 09-06-2019, 11:05 AM
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davetherocketguy davetherocketguy is online now
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Quote:
Originally Posted by jakebake91 View Post
Gotcha. Wasn't sure if 38mm was id or od. So... could you use some kind of a plastic plug with a male and female threaded end glued into the halves of the tube, making it able to unscrew in half? I was thinking about pool cues that break down. My 1st thought was aluminum, but I remember you had said no metal.
They do make exceptions for metal if there is no other way to achieve structural integrity. I'm not sure I could make that argument here though just because of convenience.
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  #247  
Old 09-06-2019, 11:07 AM
jakebake91 jakebake91 is offline
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Originally Posted by davetherocketguy View Post
They do make exceptions for metal if there is no other way to achieve structural integrity. I'm not sure I could make that argument here though just because of convenience.
If something like that would work, the threads of an aluminum plug would be considerably stronger
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  #248  
Old 09-06-2019, 01:09 PM
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Dire Wolfy Dire Wolfy is offline
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you need to build a rocket disc now

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  #249  
Old 09-06-2019, 01:44 PM
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hiflyer hiflyer is online now
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Originally Posted by Dire Wolfy View Post
you need to build a rocket disc now
Just put some motors on this:
https://www.startrek.com/article/ent...flight-finally

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  #250  
Old 09-06-2019, 01:51 PM
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John Hansen John Hansen is offline
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https://youtu.be/sK0nYSz_Gus

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