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Unread postAuthor: Insomniac » Thu Sep 29, 2011 2:29 am

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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

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Unread postAuthor: jackssmirkingrevenge » Thu Sep 29, 2011 2:37 am

MrCrowley wrote:So, no, not looking like I'll be buying any haha.


Student, pfff...

:D

Dude, carbon fibre! Seriously!

Would I also need to buy different epoxy for the carbon fibre? I already have some epoxy for the fibreglass.


I believe it's chemically the same thing (assuming you weren't going to use polyester resin) but they appear to differenciate between bonding and laminating resin in terms of viscosity, which makes sense, you want something for lamination to be more runny to get in all the weave.
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Unread postAuthor: Insomniac » Thu Sep 29, 2011 3:20 am

Sorry for not contributing anything, but I can't resist...

Link!

:D
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

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Unread postAuthor: jackssmirkingrevenge » Thu Sep 29, 2011 6:26 am

Insomniac wrote:Sorry for not contributing anything, but I can't resist...


Of course you then have no money to put in it 'cause you've spent it all on your wallet :D

Shall we set up a paypal donation fund to MrC can splash out for some CF...
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Unread postAuthor: Moonbogg » Thu Sep 29, 2011 10:59 am

jackssmirkingrevenge wrote:
Insomniac wrote:Sorry for not contributing anything, but I can't resist...


Of course you then have no money to put in it 'cause you've spent it all on your wallet :D

Shall we set up a paypal donation fund to MrC can splash out for some CF...


Or how about we splash out for Mr. C so he can buy an aluminum barrel with a threaded coupling?
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Unread postAuthor: jackssmirkingrevenge » Thu Sep 29, 2011 11:04 am

Moonbogg wrote:Or how about we splash out for Mr. C so he can buy an aluminum barrel with a threaded coupling?


Only if we can reserve some of the funds to buy you some epoxy so you won't hate/fear it as much ;)
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Unread postAuthor: POLAND_SPUD » Thu Sep 29, 2011 12:15 pm

@Moonbogg
Lol fair point - getting an aluminium or steel barrel might be cheaper than reinforcing PVC/ABS with cf and epoxy
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Unread postAuthor: Gun Freak » Thu Sep 29, 2011 12:47 pm

Finding the perfect aluminum pipe might be hard considering the sabot was machined for the current barrel...
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Unread postAuthor: LeMaudit » Thu Sep 29, 2011 1:31 pm

I will not machine another sabot. Just forget it! :D
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Unread postAuthor: jackssmirkingrevenge » Thu Sep 29, 2011 2:33 pm

LeMaudit wrote:I will not machine another sabot. Just forget it! :D


What if MrC casually mentions that he fitted a new 4" barrel ;)
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Unread postAuthor: Moonbogg » Thu Sep 29, 2011 2:35 pm

jackssmirkingrevenge wrote:
Moonbogg wrote:Or how about we splash out for Mr. C so he can buy an aluminum barrel with a threaded coupling?


Only if we can reserve some of the funds to buy you some epoxy so you won't hate/fear it as much ;)


Actually, I just may use some epoxy on my new design. It just won't be holding end caps on or anything.

About the barrel, can't we just find him the same barrel he has now, but just in METAL?!
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Unread postAuthor: MrCrowley » Thu Sep 29, 2011 3:47 pm

As for an aluminium barrel:
http://www.trademe.co.nz/business-farmi ... 200893.htm

50.5mm O.D. with 1.5mm walls for an I.D. of 47.5mm. It could work although i'm not sure if the walls are thick enough and I still have to find a way of threading it somehow. I've bought from him before and he will cut lengths for me. The longest length that can be posted is 1.5m.
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Unread postAuthor: al-xg » Thu Sep 29, 2011 4:09 pm

I'm sure you could join two lengths neatly enough if needed. 3m barrel :)

You could also just find a way to get a seal on the barrel and then fasten it down by some other means.
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Unread postAuthor: jackssmirkingrevenge » Thu Sep 29, 2011 5:01 pm

Moonbogg wrote:Actually, I just may use some epoxy on my new design. It just won't be holding end caps on or anything.


Baby steps :)

As to reinforcing the barrel there is a simpler solution - strong tubing slightly bigger than the barrel sleeved over it, and simply pour epoxy in the gap.

Wrapping the barrel with wire first makes it stronger and helps to economise on epoxy.
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Unread postAuthor: MrCrowley » Thu Sep 29, 2011 5:11 pm

jackssmirkingrevenge wrote:As to reinforcing the barrel there is a simpler solution - strong tubing slightly bigger than the barrel sleeved over it, and simply pour epoxy in the gap.

Okay, we've exceeded my budget once again. Back to the fibreglass :wink:


edit: For application, I'm thinking of mixing the epoxy in a disposable cooking tray and using a paintbrush to paint the underside of the first 20cm of the fibreglass (which will be enough to complete a single wrap of the barrel), then applying more epoxy to the underside, 20cm at a time, and continuing to wrap the fibreglass as I go. After that it'll all be wrapped in plastic wrap.

Apart from gloves, a well ventilated room and a newspaper covered floor, any other precautions I should take?
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