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 59 users online :: 4 registered, 0 hidden and 55 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Administrators
Global Moderators
global_moderators.png CS

"In the world of spuds today"

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

Unread postAuthor: wannabie » Sun Mar 09, 2008 1:05 am

Yeah well... My mum wont let me use anything past its rated pressure D:
And anyway I was thinking of making a high pressure (400psi) 1/2" Pneumatic.
  • 0

In epoxy we trust.
User avatar
wannabie
Captain
Captain
 
Posts: 304
Joined: Sun Apr 15, 2007 11:44 pm
Location: Australia
Reputation: 0

Unread postAuthor: viskaren » Sun Mar 09, 2008 1:09 am

In the world of spuds today, I begin planning for the largest puclic works project since the eerie canal.

plans for my warwolf-

-Steel Combustion Chamber 8 inch diameter
-6 foot barrel (steel)
-Hairspray

I like to keep it simple.
  • 0


viskaren
Private First Class
Private First Class
 
Posts: 25
Joined: Sat Mar 08, 2008 10:56 pm
Location: GA
Reputation: 0

Unread postAuthor: SpudBlaster15 » Sun Mar 09, 2008 1:24 pm

MrCrowley wrote:
SpudBlaster15 wrote:In the world of spuds today, I finally managed to shoot a paintball through both sides of a steel coffee can.
:shock: What do you think the fps was?


It was certainly approaching the speed of sound, and the paintball used was unfrozen.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: SpudFarm » Sun Mar 09, 2008 1:38 pm

in the world of spudfarm today:
i got my chrony and did some testing.
the hybrid at a 5x was at 1075 FPS and my pneumatic at 690.
look here for results against the evbec
  • 0

User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: Ragnarok » Sun Mar 09, 2008 2:34 pm

@DYI: Well, that's quite an impressive day. Sounds like my resume (but why I'd put that on my resume, I can't think.)

I haven't done much - well, any - building or shooting lately, in spite of being away from the university. The local weather has been classified as a disagreeable jerk.

So, that means more thinking!!!
In case you've missed my topic on darts: http://www.spudfiles.com/forums/improvi ... 13477.html

... I'm hoping to hit on a design that is both accurate at hundreds of yards, and capable of penetrating quite thick plate steel at similar ranges. Then I'll try to apply the principle, with a video that will probably result in me shooting a camera into bits.

Well, if I can get it all to work that is...
  • 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 » Sun Mar 09, 2008 10:25 pm

Got a high pressure pump planned.

Working out a new design for my school cannon...

I've decided, f*ck making it small and portable. I'm making this for myself, so I want it big and powerful, even though that's the opposite of what i'm supposed to be building.

Still got a semi complete hybrid sitting on my bench, still need a barrel and 1 1/2" chamber.;

Cleaned the garage yesterday, loads of space now :)
  • 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: bigbob12345 » Sun Mar 09, 2008 10:41 pm

In the world of spuds today I went airsofting and brought the KAMG along with its new triggered burst disk setup.
lots of people throw away random junk on this large pile of junk. there were things like sheet metal, old radios, a water heater, random car parts, old electronics, broken TV's and computors, and just random garbage. I must have fired over 100 shots that day as I used an entire roll of brown tape(my favorite burst disk material). By the end of the day everything kinda looked like swiss cheese, the water heater was vaporized and mangled metal littered the ground.
besides that I got my pvc mini coax to work and am happly firing bbs at everything.
and that is about it.
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jackssmirkingrevenge » Mon Mar 10, 2008 12:13 pm

I just poured the casting of a new bolt for the latest installment of the auto-breech saga. As was rightly pointed out, since the bolt relies on momentum to open fully and return, bolt weight is an issue. The original bolt tipped the scales at a mere 2 grams, the new one should weigh at least four times that amount. I've also thrown a steel washer into the casting matrix to reinforce it in order to cope with the increased stresses.

Nothing left to do but cross appendages while the epoxy cures :roll:
  • 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: Jared Haehnel » Mon Mar 10, 2008 12:45 pm

Good luck Jack...I'm waiting for my epoxy to arrive to cast my 4" piston valves for my new cannon...

Then I'm on to buy the PVC....
8)
  • 0

My current projects....

Currently buying part for...
http://www.spudfiles.com/forums/my-new- ... rt,15.html
Still on the drawing board...
C02 tank hybrid
Screen doors for submarines...
User avatar
Jared Haehnel
Colonel
Colonel
 
Posts: 611
Joined: Tue Feb 19, 2008 4:15 pm
Location: White River Jct, Vermont
Reputation: 0

Unread postAuthor: BigGrib » Mon Mar 10, 2008 3:10 pm

In the world of spuds today...I've been working on my camera flash circuit for a little bit now and am almost ready to strap it on my old trusty advanced combustion. The weather here in EWA (Eastern Washington) is now in the mid 50's so spudding in upon us. I've got my new bolt action tennis ball barrel that I haven't gotten to test that I might actually take out today.
  • 0

Yea, that's definitely going to get you at least a tazer.

<a href="http://www.youtube.com/watch?v=AkMkGOpAF4s">DONT TAZE ME BRO.. DONT TAZE ME... AHHHH</a>
facebook.com/biggrib
User avatar
BigGrib
Colonel
Colonel
 
Posts: 652
Joined: Mon Oct 01, 2007 11:43 pm
Location: TriCities, WA
Reputation: 0

Unread postAuthor: daberno123 » Mon Mar 10, 2008 3:20 pm

Jared, do you know that a 3" cap fits perfectly in 4" pipe?

Just a heads up because that would be a lot of epoxy :shock:
  • 0

User avatar
daberno123
Colonel
Colonel
 
Posts: 594
Joined: Mon Nov 19, 2007 5:56 pm
Location: Ohio
Reputation: 0

Unread postAuthor: DYI » Mon Mar 10, 2008 8:22 pm

In the world of spuds today, I did quite a bit of design work on the final version of the [redacted] project that's ongoing at the moment (and it will continue to be that way for several months, probably all summer).

Also, I was inspired by the "fire extinguisher flamethrower" thread to make my own. Not nearly as ghetto though, and I have so many parts lying around from failed and impractical projects that I only needed so spend $30 at the hardware store. The total cost of parts would have been well over $200 if I hadn't used nearly 90% recycled components. The fuel storage chamber is 150 ci of 4" steel pipe, a bit more with the hose and 2" nipple added, and the pressure source is my Type 16 Industrial nitrogen tank. Right now it's just a water gun, as I haven't got the go-ahead to use fuel (read: gasoline or methylated spirits) yet.

Here it is, in about half its glory :D :

Image

And with its proud creator:

Image

Planned upgrades include:
-proper fuel line hose, to allow use at 300+ psi
-better nozzle. Right now, the flow is forked up, and it sprays a bit, only shooting around 40 feet
-backpack size nitrogen tank, so that the whole thing is contained in the pack (which already weighs 25 pounds)
-new tank, the current one is part of the hybrid in my sig and weighs twice as much as it needs to because of the rather thick endcaps
-equalisation valve so that I'm not pouring fuel in through the same hole that the air is coming out of. The current setup is annoying, slow, and absurdly dangerous
-replacing tape with hose clamps to avoid the ghetto look
-replacing the 1" solid teflon rod that I'm using as a spacer. I'll be right pissed if it melts, and I can use something that's not as expensive or rare in its place
-probably a lot more that I can't think of right now...


I'll make a thread about it when it looks decent and I have some shooting videos.
  • 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: Novacastrian » Mon Mar 10, 2008 8:40 pm

Looks like it will be very nice when you finish DYI, what kind of range do you expect? The teflon will turn clear at about 300celcius before it starts to melt at around 320celcius (virgin ptfe)

"Today in the world of spuds" I started making a 4" (well just under) piston co-ax. The chamber is S/S,around 1.3litres and i plan on making it so i can have interchangable barrels, the biggest will be 34mm and the smallest 12.7mm.
The piston weighs 150grms and will have around 8mm travel.
It will be the biggest piston cannon i have made, should be done by the end of the week.

There you go, get some metric up ya's! :D
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Mar 10, 2008 8:46 pm

daberno123 wrote:Just a heads up because that would be a lot of epoxy :shock:


Not necessarily ;)

And with its proud creator:


omG DYI, you never told us you had a supermodel at home!
  • 0

Attachments
katemoss.GIF
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: iknowmy3tables » Mon Mar 10, 2008 8:51 pm

its cool but how could you use up 4" pipe like that, it could be a high pressure pneumatic that could archive supersonic, only use an fire extinguisher or a used tank or a pvc tank which is fairly safe
  • 0


iknowmy3tables
Major General
Major General
 
Posts: 1558
Joined: Fri Dec 15, 2006 3:57 pm
Location: maryland
Country: United States (us)
Reputation: 0

PreviousNext

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'