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 76 users online :: 4 registered, 0 hidden and 72 guests


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

Registered users: Bing [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

weighted gun and accuracy

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

weighted gun and accuracy

Unread postAuthor: Sticky_Tape » Mon Jan 05, 2009 6:36 pm

I had a thought and tested it on my new gun. The gun I used was a copper barrel sealer that is piloted by a ballvalve. Ballvalves that are used on a light gun throw off accuracy an annoying ammount.My gun is very front light. I thought why not add weight 1/4 way back from the front of the gun. This would add more inertia near the front of the gun making the gun less susceptable to the heavy jerking movement of ballvalve pilots. I tried this. The gun without the weight was very unaccurate and probably couldn't hit a 2L pop bottle from 30' with a barrel full of steel bb's. With a wieght the gun could land 30 steel bb's on 4''x7'' cardboard box at about 30'. I really suggest wieghting the end of your gun if it is very front light. Tell me what you think.
  • 0

You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
User avatar
Sticky_Tape
Brigadier General
Brigadier General
 
Posts: 1175
Joined: Thu Jan 31, 2008 6:35 pm
Location: Sydney, Nova Scotia, Canada.
Reputation: 0

Unread postAuthor: CasinoVanart » Mon Jan 05, 2009 6:55 pm

They use the same idea on compound bows to balance it out. All i do is rest the tip of the barrel against something solid (my .50 cal piston rifle is nearly 6 feet long and only weighs 1024grms) :wink: The only other way is to use a blow gun trigger i spose.
  • 0

User avatar
CasinoVanart
1st Lieutenant
1st Lieutenant
 
Posts: 281
Joined: Wed Jul 30, 2008 1:10 am
Reputation: 0

Unread postAuthor: Sticky_Tape » Mon Jan 05, 2009 7:36 pm

Yeah but ballvalves have higher flow and if you wanted to use high pressures or a compressor to fill your gun you would most probably have to use quick connects. You would have to use a quick connect ballvalve and a blowgun on the pilot assembly of you gun making you spend more mulla.
  • 0

You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
User avatar
Sticky_Tape
Brigadier General
Brigadier General
 
Posts: 1175
Joined: Thu Jan 31, 2008 6:35 pm
Location: Sydney, Nova Scotia, Canada.
Reputation: 0

Unread postAuthor: Hotwired » Mon Jan 05, 2009 7:48 pm

CasinoVanart wrote:(my .50 cal piston rifle is nearly 6 feet long and only weighs 1024grms) :wink:


Numbers numbers. My cannon is just over 1m long and clocks in at 2kg.

What it's made of makes a big difference ^^


Still, mine is also quite back heavy, the QEV, most of the chamber and the pilot tubing is situated well behind the grip.


Whatever the cannon design, the more secure its position the more accurate it will be simply through reducing unwanted movement on firing. More mass is one way but using a bipod or even attaching it to a larger object to fire from would work too.
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Jan 06, 2009 12:30 am

Unless you're shooting from an unsupported position, you ideally want a rifle that's as heavy as possible in terms of accuracy - take unlimited class benchrest riflesas an example.
  • 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: CasinoVanart » Tue Jan 06, 2009 8:33 pm

I like the scope Jack, is that the kind of thing manufactures of ammo would use to test their stuff?

I would like to see someone shoot it from the hip!
  • 0

User avatar
CasinoVanart
1st Lieutenant
1st Lieutenant
 
Posts: 281
Joined: Wed Jul 30, 2008 1:10 am
Reputation: 0

Unread postAuthor: Daltonultra » Tue Jan 06, 2009 9:54 pm

Why not skip the BV altogether and get a levered globe valve.

http://www.mcmaster.com part number 4625K83
  • 0

User avatar
Daltonultra
1st Lieutenant
1st Lieutenant
 
Posts: 282
Joined: Mon Nov 24, 2008 8:17 pm
Location: Columbus, Ohio, U.S.A.
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: pizlo » Tue Jan 06, 2009 10:25 pm

You could have a blowgun piloted qev piloting the piston for cheaper than those valves you posted.
  • 0

User avatar
pizlo
Brigadier General
Brigadier General
 
Posts: 783
Joined: Fri Dec 22, 2006 7:27 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Jan 07, 2009 12:33 am

CasinoVanart wrote:I like the scope Jack, is that the kind of thing manufactures of ammo would use to test their stuff?


Not quite, it's more the kind of thing enthusiasts with deep pockets use to knock off a gnat's knacker from 2,000 yards :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: D_Hall » Wed Jan 07, 2009 9:34 am

jackssmirkingrevenge wrote:Unless you're shooting from an unsupported position, you ideally want a rifle that's as heavy as possible in terms of accuracy - take unlimited class benchrest riflesas an example.


Meh....

I should find a way to bring in pics of our .50 BMG at work.

Gun weighs in at just over 600 pounds.... And its held to a 3,000 pound table using 1" bolts. :D
  • 0

Last edited by D_Hall on Wed Jan 07, 2009 9:36 am, edited 1 time in total.
Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1759
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Unread postAuthor: D_Hall » Wed Jan 07, 2009 9:35 am

[damnit, double post again... WTF!]
  • 0

Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1759
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Unread postAuthor: jackssmirkingrevenge » Wed Jan 07, 2009 1:57 pm

D_Hall wrote:Gun weighs in at just over 600 pounds.... And its held to a 3,000 pound table using 1" bolts. :D


All this for a 50 cal? I've guessing it doesn't quite need a recoil absorbtion system :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

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'