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 43 users online :: 5 registered, 0 hidden and 38 guests


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

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, 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: MrCrowley » Thu Sep 15, 2011 2:52 pm

ITWOST: Extremely busy with uni, probably no chance of fibre-glassing my hybrid barrel (in preparation for the miniboy projectile) until mid-November. Launch date may very well be late-November.
  • 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: Gun Freak » Thu Sep 15, 2011 4:03 pm

  • 0

Attachments
untitled.png
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: SpudBlaster15 » Thu Sep 15, 2011 4:28 pm

:lol:
  • 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: jackssmirkingrevenge » Thu Sep 15, 2011 11:31 pm

MrCrowley wrote:Launch date may very well be late-November, I'm going to keep posting these delays in the hope that you will all forget about the mini-boy and I get to keep the bestest paperweight EVAR! Yeah...


:roll: :D
  • 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: MrCrowley » Wed Sep 28, 2011 5:35 pm

ITWOST: 2" sprinkler valve going for $10USD on an NZ auction site. Need some ideas of what to make with it otherwise i'll let it slide. Keep in mind I already have a 2" sprinkler valve pneumatic for tennis balls and golf balls as well as a 1.5" porting piston valved pneumatic, among others.

Image
  • 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: mattyzip77 » Wed Sep 28, 2011 6:52 pm

Perhaps a cannon for jsefcik, to keep the forums clean???? :D However, that is a nifty valve there. You could probably remove them hoses and put a schrader valve in 1 and a small closed nipple for a blowgun in the other. Not a good spot for a blowgun, but just sayin. For 10 dollars, I would get it regardless. Def worth it!!
  • 0

Go Bruins!!!!
User avatar
mattyzip77
Donating Member
Donating Member
 
Posts: 1249
Joined: Tue Jun 28, 2011 12:22 pm
Location: Taxachusetts
Reputation: 0

Unread postAuthor: saefroch » Wed Sep 28, 2011 8:06 pm

Use it as a pilot for something bigger? Re-sell it?
  • 0

User avatar
saefroch
Major General
Major General
 
Posts: 1679
Joined: Mon Jun 08, 2009 8:47 am
Location: U.S.A.- See Map
Country: United States (us)
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Technician1002 » Wed Sep 28, 2011 8:10 pm

Hmm, that would make a nice pilot for a pumpkin cannon.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: SpudBlaster15 » Wed Sep 28, 2011 8:10 pm

Build a replica of the SWAT cannon and use the 2" sprinkler as a pilot valve?
  • 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: Lockednloaded » Wed Sep 28, 2011 9:44 pm

Modify it, sell it for profit to another so spudder down under?
Double barreled, double valved TB cannon?
Shoot it out of your hybrid? It's cheaper then what you plan on shooting in the near future :lol:
  • 0

I love lamp
User avatar
Lockednloaded
Major General
Major General
 
Posts: 1558
Joined: Thu Sep 03, 2009 9:38 pm
Location: Texas, USA
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Sep 28, 2011 11:25 pm

Lockednloaded wrote:Shoot it out of your hybrid?


:lol: :lol: :lol:

+1

... and less people will care if you lose it!
  • 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: Gun Freak » Sun Dec 11, 2011 7:07 pm

ITWOST... Learning AutoCAD... SketchUp isn't good enough :D Here is my first real drawing.
  • 0

Attachments
cad.png
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: dewey-1 » Mon Dec 12, 2011 12:41 am

No 3D yet? Are you slacking off? :D

Keep practicing! You will learn a lot of tricks.

I like to use the offset command alot.
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: Gippeto » Mon Dec 12, 2011 2:14 am

dewey-1 wrote:I like to use the offset command alot.


X2...an even split with construction line. :)

3d still hasn't "clicked" for me...but 2d is fine for construction drawings.
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2394
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: MrCrowley » Tue Dec 13, 2011 9:13 pm

ITWOST,

Did some chronographing with my small (former M480) hybrid and fishing sinkers. The fishing sinkers weigh 42g and were fired at a 7x mix and a 10x mix.

7x mix (64 layers of tin foil)
Chrony: 590fps/180ms
HGDT: 720fps/220ms

10x mix (56 layers of tin foil and 1 aluminium disk that bursts at ~300PSI)
Chrony: 730fps/222ms
HGDT: 850fps/260ms

The discrepancy could be due to two things: either the burst disk material interfered with the chrony or the burst disks weren't strong enough (probably more likely).

I think the chrony results are relatively consistent with HGDT considering I was firing through the chrono from ~2m away and the exact bursting pressure is not known but estimated.

I was really disappointed with the results until I weighed the fishing sinkers, I thought they were only about 20g, not 42g. No wonder the results are average, I'm firing something that weighs the same as a golf ball but through a 19mm diameter barrel. Not very efficient at all.

I want to try some light projectiles (<10g) as HGDT says they should be well over the speed of sound. Just need some ideas for light projectiles that fit in the barrel (using sabots would be difficult with the chrony, especially discarding sabots and not just 'pushers').

I've documented this all with video, perhaps if I can be bothered tonight I'll edit it all.
  • 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

PreviousNext

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'