Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 38 users online :: 3 registered, 0 hidden and 35 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Epoxy questions (aka JSR's field day)

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Epoxy questions (aka JSR's field day)

Unread postAuthor: sandman » Mon Nov 19, 2007 8:50 pm

right now im designing a bb gun for a friend cause he asked :roll:
but i will get his battery powered airsoft gun as payment :)

anyway i think i can meet most of the requirements he gave me:
600 fps: GGDT says i can with some rough numbers i used
semi auto: see below
CO2 powered: Easy enough
250+ feet range: Range Calc says maybe

So far ive come up with a coaxial design (i can make models if you require visual aids), but i am having trouble thinking of how i will make it semi auto.

But, before i post my idea i need to know if you can dremel part of a piston cast with epoxy out. Or will it crack and crumble?
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Mon Nov 19, 2007 9:41 pm

I don't see why you couldn't dremel epoxy. What were you planning on doing? O-ring grooves?
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: Ragnarok » Mon Nov 19, 2007 10:27 pm

I've dremelled epoxy before, but it has a nasty way of clogging tools. And I needn't remind you to wait until it's hardened...

And semi-auto sounds like it could be a challenge. Did you have any plans for the feed mechanism?
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Unread postAuthor: Zen/// » Mon Nov 19, 2007 10:35 pm

Mon canard est en feu!!!
"My duck is on fire!!!"
Lol I go to french immersion school.

On topic: Maybe make a high powered vortex gun? And make the vortex block out of epoxy and drill various sized holes?

edit: http://www.spudfiles.com/forums/unregul ... 11684.html

or like that
  • 0

User avatar
Zen///
1st Lieutenant
1st Lieutenant
 
Posts: 278
Joined: Sat Oct 27, 2007 3:49 pm
Location: In a foxhole sniping,Calgary, Canada
Reputation: 0

Unread postAuthor: Ragnarok » Mon Nov 19, 2007 10:46 pm

Why exactly would a lathe be needed for a vortex BBMG?

You brought it up - How many people can recognise the source of "Mon canard est en feu!" WITHOUT googling it?
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Unread postAuthor: MrCrowley » Mon Nov 19, 2007 11:16 pm

Full metal BBMG? Maybe some awesome lathe aluminium vortext block which you didn't want to blunt all your drill pieces on?



I learn German, not French. German is way better, just ask JSR :wink:
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: ShowNoMercy » Mon Nov 19, 2007 11:18 pm

But a lathe could turn out a vortex block, you would need a mill.
  • 0

Jesus saves, no need to pray
The gates of pearl have turned to gold
It seems you've lost your way
User avatar
ShowNoMercy
Brigadier General
Brigadier General
 
Posts: 1094
Joined: Mon Mar 19, 2007 8:08 am
Location: Jersey Bitches!
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Ragnarok » Mon Nov 19, 2007 11:47 pm

Well, the original quote was in French (although from an English source). It's not my choice which language the author used.
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Unread postAuthor: jackssmirkingrevenge » Mon Nov 19, 2007 11:58 pm

So far ive come up with a coaxial design (i can make models if you require visual aids), but i am having trouble thinking of how i will make it semi auto.


The blow-forward breech is a good idea and relatively simple to make.

But, before i post my idea i need to know if you can dremel part of a piston cast with epoxy out. Or will it crack and crumble?


Depends on the epoxy you're using - the marine epoxy I use can be cut, drilled, sanded and polished easily, butfor example you cannot do that with araldite.

Lol I go to french immersion school.


sounds hairy :roll:

Image
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: f.c » Tue Nov 20, 2007 4:04 pm

yes you can do this with epoxy. when epoxy dries its just like a plastic such as acrylic and can be treated accordingly.
  • 0

can i be a sasquatch ?
User avatar
f.c
Captain
Captain
 
Posts: 340
Joined: Sun Jul 08, 2007 2:40 am
Reputation: 0

Unread postAuthor: sandman » Tue Nov 20, 2007 5:50 pm

well, i will not be showing my idea cause jacks gun puts it to shame so ill be using the blow-forward breech design, i was afraid at first of using it cause of the small size of the gun but JSR proved u can do it so i shall try it.

btw,i didnt read the whole topic but i thing that if you decrease the filling fitting diameter you could get closer to fully auto with the design
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: DYI » Tue Nov 20, 2007 5:57 pm

I understood the "Mon canard est en feu" bit, but I'm Canadian in Grade 10 French, so I probably should.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: mark.f » Wed Nov 21, 2007 7:39 am

The blow-forward design is definitely your best bet. I have tried the paddle design for automatic fire, and it plagued me with feeding troubles never fully resolved.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3465
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: sandman » Fri Nov 23, 2007 8:40 pm

JSR can you tell me what the part of the valve that slides into the barrel is made of? Like if it is a common household object.
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sat Nov 24, 2007 4:32 am

Here's a breakdown of the parts. All the tubing was purchased in one metre lengths from a hobby store, but you can find it online too.
  • 0

Attachments
blowforward.jpg
blowforward.jpg (19.87 KiB) Viewed 385 times
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Next

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'