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 45 users online :: 5 registered, 0 hidden and 40 guests


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

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], jimmy101, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

ball bearings

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

ball bearings

Unread postAuthor: POLAND_SPUD » Mon Nov 19, 2007 1:47 pm

I am planing to use 1/2" or 12mm ball bearings as ammo. I know one place that have them in almost any posible size and quite cheap as well.

1.My question is... Has any one tried using them as ammo, with what results?

2.Does the magnus effect noticably affects their accuracy?

3.Would a few cm's of insultion tape placed inside the upper part of the barrel would be enought to induce spin on balls ?
( also post if you have ever made a hop-up on spudgun )

feel free to write anything you think is important/relevant/interesting
  • 0

User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: Ragnarok » Mon Nov 19, 2007 2:22 pm

1) Yes, many people have use steel ball bearings as ammo, and the 12.7mm or 1/2" size is probably the most popular.

I usually use 3/4" size - they make big holes, fly quite well, but won't perform as well as a dart at either.

2) The magnus effect should have a very noticeable effect on range, and should improve accuracy as well, but to what extent depends on spin rates.

3) I don't think so, I don't think it would have the right grip.
I created a very brutal hop for my last cannon that gave a very pronounced spin to the projectiles, and if I ever got the chance to use it on HEAL, it would probably put a ball bearing a mile - well, that's an exaggeration, but it should go at least half that.
That was only a mixed of "sculpted" copper and rubber sheet that sat at the muzzle, although I'm not sure I have a photo of 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: mega_swordman » Mon Nov 19, 2007 2:26 pm

1. Yes, people have indeed used them before and they work great for the use of puncturing objects.

2. I'm not sure.

3. I don't think so; if anything I think it would slow down the ball bearing, thus causing a loss of power and possibly a drop in accuracy.

EDIT: Drat! I've been out-drawn.
  • 0

"Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity." George S. Patton
User avatar
mega_swordman
Colonel
Colonel
 
Posts: 527
Joined: Wed Nov 29, 2006 2:37 pm
Location: Bay Area, California
Reputation: 0

Unread postAuthor: POLAND_SPUD » Mon Nov 19, 2007 3:17 pm

I was planing to put my hop-up in the breech (not in the muzzle part of the barrel) - so that it would start spinning form the very begining.

I am just guessing - if my barrel has ID of 12.7 mm, balls have 12 mm, a 0.1 - 0.3 mm thick and 10 cm long piece of insulation tape placed on the upper inside surface of the barrel should induce spin on balls... well, at least theoreticly right ?
the only problem would be the consistency or am I missing something else ?

Ragnarok - I've just found something... 3/4" balls weight about 28 gramms - that's ~ 3.5 times more than 1/2" ones (8.5 gramm) :shock: - what muzzle velocity do you get with them...?

http://www.gewa.com.pl/page.php?d=kulki1wymiary <-- you might find it usefull - a page in polish showing weight and size of steel ball bearings (before u ask.. no... you don't need to speak polish at all to read the table :D )
  • 0

User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: jackssmirkingrevenge » Mon Nov 19, 2007 3:36 pm

Ball bearings rock, here's what a 0.5" ball bearing did when fired from my 3/4" piston launcher :D

I still want to make a pneumatic big enough to fire this one :)
  • 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: Los Frijoles » Mon Nov 19, 2007 4:27 pm

jackssmirkingrevenge wrote:I still want to make a pneumatic big enough to fire this one :)

Is that a bowling ball or its smaller, heavier cousin?
  • 0

User avatar
Los Frijoles
Private First Class
Private First Class
 
Posts: 38
Joined: Mon Dec 12, 2005 7:22 pm
Reputation: 0

Unread postAuthor: Maniac » Mon Nov 19, 2007 4:27 pm

:shock: :shock: what the crap jack where did that thing come from is it even a ball bearing looks more ike acannon ball :shock: :shock:
  • 0

Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
Maniac
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: DYI » Mon Nov 19, 2007 4:48 pm

Jack, how much does that thing weigh? It looks like a shotput ball, but bigger. I could fire something that size from the SCTBDC, but it probably wouldn't go much over 200 fps by the looks of it.
  • 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: Ragnarok » Mon Nov 19, 2007 4:53 pm

It's part of a crane's summat or other, and weighs in at 1.4 kg if I remember right from the last time JSR lamented his lack of a 3" pneumatic.
  • 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: DYI » Mon Nov 19, 2007 4:57 pm

It seems as though the SCTBDC could get that going about 340 fps. I should try to get some of those. I'd ask JSR to send it to me, but I don't know how the overseas shipping on it would be. Of course, 1.4kg isn't that heavy.
  • 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: Maniac » Mon Nov 19, 2007 4:59 pm

yea that thing would be a beast to fire would do some extreme damage
  • 0

Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
Maniac
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you
Reputation: 0

Unread postAuthor: psycix » Mon Nov 19, 2007 5:10 pm

1.4 kgs going 340 fps!?
Man that cannonball will go through everything!
just insane!
I mean like.... everything! cars, trees, walls, tanks, concrete bunkers, it just bashes through! :P
  • 0

User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: windshrike » Mon Nov 19, 2007 5:45 pm

I officially prohibit JSR or DYI from shooting that cannonball without videotaping it. At 1.4 kgs, the energy retention would be amazing, it would fly for a LONG time. In my opinion, it should be shot at a solid block of ice.
  • 0

User avatar
windshrike
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Thu Jun 28, 2007 4:23 pm
Reputation: 0

Unread postAuthor: DYI » Mon Nov 19, 2007 6:01 pm

The only problem is that JSR doesn't have a big enough gun, and I don't have the ball bearing. That would need to be a really big chunk of ice to stop it though.
  • 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: windshrike » Mon Nov 19, 2007 6:14 pm

JSR hasn't said that he wouldn't send it to you, DYI. I don't think that he will, but, on second thought, perhaps FEAR would be a more appropriate solution to the massive ball-bearing problem. And I never said anything about the ice stopping it. :shock:
  • 0

User avatar
windshrike
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Thu Jun 28, 2007 4:23 pm
Reputation: 0

Next

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], jimmy101, Yahoo [Bot]

Reputation System ©'