I have some scraps of the G10 material that I can use to experiment with. Does anyone have some short scraps of carbon fiber tube that they would donate to the cause of scientific advancement?
I'm not looking to build a working gun. Just some 6-8" pieces to see if the process would work. Either standard CF tube, or actual barrel sections.
3. Protect my spear shaft from injury while the shaft is in the gun. Less scratches and dings to the spear shaft "enclosed" in the CF
This is the first time I've ever heard someone say they wanted to use a carbon fiber gun... as a sacrificial buffer to protect their shaft. :laughing3:
If I'm not mistaken, Chad filled the tube with a wood dowl, and had to add the bun later to get the balance right. The whole point of a euro is to keep the profile small, yes?
You're correct - he posted that the bun was added to help balance. I was thinking of the hot dog bun as a way to use a base sturdy structure and add reinforcement, mass, and enclosed track at same time. I don't think of well-positioned mass as a negative.
The point of a euro(and railguns) is indeed to keep profile small, but that's a relative distinction and subject to an individual's preference. You have the following cross-sections:
Standard euroguns & railguns like Rob Allen (28mm)
-and-
Thicker euros, meant for more power:
Aimrite railguns, ranging from standard to the King Venom
Edge railgun (32mm)
Riffe Euros (debatable)
Sea Sniper euros
Sea Sniper ENCLOSED euros
Abellan euros
Bluetec euros
etc.
From a pure power/accuracy standpoint, I would think that any gun with band power that necessitates an enclosed track... should be made with a bigger cross-section than a standard railgun. Not huge, but slightly bigger to manage recoil.
If you're using standard power, a slightly oblique teak barrel could also be made near the same dimensions as a standard railgun barrel (with enclosed track added). At that power level, it would shoot well and resist bending.
All that being said, you both obviously have a vision in mind and whatever my personal bias is, I'm eager to see what the final product is. Jeff on a mission usually results in fun stuff. 
I have some CF tube scraps, but don't think any are standard railgun diameters. Does that matter for your tests?
I have some CF tube scraps, but don't think any are standard railgun diameters. Does that matter for your tests?
Any size will do Fuzz. I just want to see if I can machine a sample piece of the G10 into the right shape, and test how well it can be epoxied to a CF tube.
You would still need to cut away the top of the sleeves to expose the top of the track for the shark fins.
Hau, if you will supply the CF tube and pay for a stick of G10, I'll assemble and machine it for you. I know that the G10 is not tecnically carbon fiber, but I think it will accomplish what you want, with fewer avenues for things to go wrong.
I might even know where I can get a piece of black G10, but I will have to double check the size.
You would still need to cut away the top of the sleeves to expose the top of the track for the shark fins.
Hau, if you will supply the CF tube and pay for a stick of G10, I'll assemble and machine it for you. I know that the G10 is not tecnically carbon fiber, but I think it will accomplish what you want, with fewer avenues for things to go wrong.
I might even know where I can get a piece of black G10, but I will have to double check the size.
You Cajons Rock... What a neat thing for Christmas Tin man.:thumbsup2:
Cheers, Don
I have spent a whole day trying to locate a CF barrel supplier. 
Sorry to drag this out.
Obviously a supplier exists as RA, Aimrite and others offer CF barreled guns and many gun builders use CF for hybrids.
I really appreciate all the help I've received
(I promise once I get this enclosed track pipe gun in my hands I'll shut up and just post condition reports and pictures, I promise:)
Dan--Fuzz---Griswold--Don Paul---or anyone know where I can buy CF barrel tubing 1.05in ID ?
Thanks
Hau,
I doubt that you will find a CF tube that has both the 1.160" OD and the 1.05" ID of a RA tube. I guess the OD could possible be a little larger, as long as the handle and muzzle don't wrap around the outside.
For the inside, if you can find something with a slightly smaller ID (like maybe 1.00") then I can machine it to the proper 1.05" ID.
Of course, larger OD combined with smaller ID means thicker wall which would be a little heavier. And don't forget that we would also need appropriate plugs at each end.
How much would it cost to just buy the barrel from RA? I could easily machine off the existing track, and I don't think that it would adversely affect the strength since we are bonding a larger G10 track right back in the same place.
These guys list a 1" ID tube, with a 0.081" wall (1.162" OD) as one of their standard sizes. No prices listed, so you would need to call.
They say the tube has a "tape wrapped exterior finish that is easily handled and gripped." I take this to mean that it might not be perfectly smooth and shiny. That's only a cosmetic thing, but if their price was lower than others, the finish might be why.
They say that it is "roll wrapped" construction, which I think means that it is made by wrapping a sheet of woven fabric around a mandrel. It might not be the optimal construction (compared to using unidirectional fabric), but we are compensating with a thicker wall. If the price was reasonable, then I think it will work.
Also, their OD tolerance is listed as +/- 0.030", which means the OD could be as small as 1.130", or as large as 1.190". I wonder if it really varies that much normally? You might want to ask if that's normal.
How does the $157 price compare to others you found? If it's reasonable, then I say let's go for it.
What size shaft do you want to use? I think I can use a piece of 1/2" G10 if you only want to go up to a 9/32" shaft. If you want a larger track for a 5/16" shaft, then I will need to start with a 5/8" thick piece of G10. The bars are only 48" long. How long will the barrel need to be?
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