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  #21  
Old 05-24-2010, 10:17 PM
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Eric posted his dried glue / hot iron method a couple of years ago.

He posted a document with "general intructions" to be followed for all his rockets and that's where I saw that method.

I have tried it and it works. I have my own techniques that I use most of the time but I'm open to new ideas and this old dog doesn't mind learning a new trick here and there.
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  #22  
Old 05-25-2010, 07:42 AM
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Quote:
Originally Posted by Mark II
Putting a hot iron on a tube presupposes that you are using a material and have a substrate that can handle the heat. IOW, you have to be sure that the only thing that will be affected by the heat is the glue. You don't have that issue when you use wet glue.

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Well, cardstock is paper, and, thanks to Ray Bradbury the flash point of paper is pretty well known!

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  #23  
Old 02-08-2016, 05:39 PM
MontanaMan MontanaMan is offline
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I found this thread in a google search, and thought I'd reply. There's a good tutorial on rolling your own tubes here: https://www.apogeerockets.com/educa...wsletter330.pdf

The author says the strength-to-weight ratio of a homemade tube is better than store-bought because it is convolutely wound, instead of spiral wound.

Also ... it's just fun to make a rocket entirely from scratch. We roll our own tubes from printer paper. Motor hooks from spring stainless steel from old windshield wiper blades. Hand-carve our nose cones from balsa, parachutes from plastic bags, wadding from TP soaked in baking soda, igniters made from kanthal wire (super-glued to a trimmed match head) ... etc. It's really exciting to build it, then watch it perform beautifully.

But for safety's sake, be sure to read the "Stability" chapter in the Handbook of Model Rocketry, and test *all* components of your rocket accordingly -- especially the all-important swing test.

Anyway, I found the link above very helpful. Best of luck to all.

.

Last edited by MontanaMan : 02-08-2016 at 07:05 PM.
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  #24  
Old 02-08-2016, 05:45 PM
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Engine hooks from old wiper blades. Brilliant!! I gotta try it!
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  #25  
Old 02-08-2016, 05:48 PM
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Quote:
Originally Posted by jeffyjeep
Engine hooks from old wiper blades. Brilliant!! I gotta try it!


Thanks! ... they work beautifully. I got a bunch from the trash can in front of an auto parts store, because I wasn't willing to wait for mine to go bad.

Last edited by MontanaMan : 02-09-2016 at 10:45 PM.
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  #26  
Old 02-08-2016, 06:56 PM
stefanj stefanj is offline
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Quote:
Originally Posted by MontanaMan
Thanks! ... they work beautifully. I got a bunch from the trash can in front of an auto parts store, because I wasn't willing to wait for mine to go bad!

I get the weirdest stares when I do that!

I've been putting clips on my home-brew and kit mid-power kits that don't come with motor retention. I bend the upper tab of the hook outwards, to that it hooks over the top of the forward centering ring. This helps prevent the hook from pulling out backwards.

Those strips have all sorts of uses, outside of rocketry. Custom hooks, bands, etcetera.
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  #27  
Old 02-08-2016, 09:49 PM
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Quote:
Originally Posted by jeffyjeep
Engine hooks from old wiper blades. Brilliant!! I gotta try it!


Sorry JJ, but that one crack me up! I guess it's true that you can teach an old dog new tricks!
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  #28  
Old 02-09-2016, 05:41 AM
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Quote:
Originally Posted by jeffyjeep
Engine hooks from old wiper blades. Brilliant!! I gotta try it!


In a pinch, straightened paper clips work too.
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  #29  
Old 02-10-2016, 02:34 PM
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Default I can see right through you, Tom said transparently.

Anybody have any idea of how to roll your own transparent body tubes/payload sections?

Seriously, can it be done?
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  #30  
Old 02-10-2016, 03:54 PM
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Well it is going to have a seam, right? Generally that is undesirable in a payload section. If you are rolling your own tube for a clear fin can you can hide the seam under a fin root.

As long as you had a mandrel of the appropriate size, you can clamp the plastic down and then heat it above the glass transition temperature for the polymer. That is what I did for my BT-70 and BT-60 fin cans and it works great. Just leaves a seam is all.

Quote:
Originally Posted by GlenP
Anybody have any idea of how to roll your own transparent body tubes/payload sections?

Seriously, can it be done?
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