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 :: 3 registered, 0 hidden and 56 guests


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

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

how to prevent ammo to fall when you shoot in down direction

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

Unread postAuthor: The Hellforger » Tue Nov 08, 2011 1:48 am

Ah so painful go read
  • 0


The Hellforger
Private First Class
Private First Class
 
Posts: 26
Joined: Tue Oct 11, 2011 1:59 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Nov 08, 2011 2:00 am

some other ways of making a detent: http://www.spudfiles.com/forums/viewtop ... tml#329096
  • 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: Zeus » Tue Nov 08, 2011 5:03 am

CooperJS wrote:maybe your magnet isn't strong enough?


There is some truth in that, aluminium is slightly paramagnetic, I don't recall the unit which is used for magnetism (I know, I should know, but it's the evening), anyway the figure is 1.008. So if aluminium is paramagnetic, then austenite should be, though minutely so.

So if the magnet is big enough, then it will work. But I dont think you fancy installing a MRI machine in the breech of the launcher.
  • 0

/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1422
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 2

Unread postAuthor: victorjung » Tue Nov 08, 2011 6:41 am

yes i would liked to use a regular magnet not a 2000 000 volt coil :) !!! :P
  • 0


victorjung
Private
Private
 
Posts: 20
Joined: Sun Nov 06, 2011 5:31 am
Reputation: 0

Unread postAuthor: jimmy101 » Tue Nov 08, 2011 7:37 pm

A magnet is a cheap and easy way to test the quality of an unknown "steel". If a magnet stick likes crazy the steel is fairly low grade and probably not homogeneous. A high quality steel won't hardly be attracted by a magnet at all. A shiny part that is strongly attracted to a magnet is probably an iron core (or a low grade steel) covered with chrome plating.

But, even high grade steels are attracted somewhat to a magnet. Strong enough magnet will usually hold on to it. Are you using crappy soft "refrigerator" magnets or decent rare earth magnets? Crappy magnets barely stick to raw iron let alone a decent steel.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3128
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: lklaussen » Wed Nov 09, 2011 9:15 pm

What I did for a pvc paintball gun was used an O ring that the paintball could sit in, but could be pushed through with small force. I put the O ring in a coupler, at the retaining ring to keep the pipe from sliding in. Then, I slid the barrel in which held the O ring between the pipe and coupler ring which allows the paintballs behind the O ring to not roll out of the barrel but easily push through with the air pressure.
  • 0


lklaussen
Corporal
Corporal
 
Posts: 61
Joined: Sat Nov 05, 2011 7:45 pm
Reputation: 0

Unread postAuthor: victorjung » Fri Nov 11, 2011 5:35 am

i used rare earth magnet... i gonna try a detent thanks
  • 0


victorjung
Private
Private
 
Posts: 20
Joined: Sun Nov 06, 2011 5:31 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: david » Tue Nov 15, 2011 12:39 am

I have used these magnets:

http://www.ebay.com.au/itm/350500863888 ... 1439.l2649

To hold this ammo:

http://www.ebay.com.au/itm/Replacement- ... 415e8e1f5c


The hard part is distancing the magnet so that it holds the bearing with enough strength to prevent it falling out, but doesnt hold it too strongly in its field as to impair its leaving velocity.
  • 0


david
Private
Private
 
Posts: 3
Joined: Tue Jun 21, 2011 4:27 am
Reputation: 0

Unread postAuthor: MrCrowley » Tue Nov 15, 2011 1:17 am

david wrote:I have used these magnets:

http://www.ebay.com.au/itm/350500863888 ... 1439.l2649

I thought we have already established magnets wont stick to his barrel?
  • 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: Zeus » Tue Nov 15, 2011 4:03 am

And yet people still use them.

Again...


Fu­cking magnets, how do they work?
  • 0

/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1422
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 2

Unread postAuthor: Crna Legija » Tue Nov 15, 2011 4:21 am

david wrote:The hard part is distancing the magnet so that it holds the bearing with enough strength to prevent it falling out, but doesnt hold it too strongly in its field as to impair its leaving velocity.


lol its wont have a effect on it that any human could notice i doubt crony would too.
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: victorjung » Sat Nov 19, 2011 3:22 am

MrCrowley wrote:
david wrote:I have used these magnets:

http://www.ebay.com.au/itm/350500863888 ... 1439.l2649

I thought we have already established magnets wont stick to his barrel?

Yeah, but there is some of those balls wich are simple steel and other wich are stainless steel !
I screwed up when i bought stainless balls :)
  • 0


victorjung
Private
Private
 
Posts: 20
Joined: Sun Nov 06, 2011 5:31 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Nov 21, 2011 2:34 am

david wrote:The hard part is distancing the magnet so that it holds the bearing with enough strength to prevent it falling out, but doesnt hold it too strongly in its field as to impair its leaving velocity.


If the projectile is a reasonable fit in the barrel, the delay between valve opening and projectile motion should actually boost velocity.
  • 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: pneumaticcannons » Mon Nov 21, 2011 10:17 am

The hard part is distancing the magnet so that it holds the bearing with enough strength to prevent it falling out, but doesnt hold it too strongly in its field as to impair its leaving velocity.

LOL, unless you are using 2 psi, it will boost velocity like jack said...
the magnet is holding the projectile very lightly and the magnet's pull only extends to maybe 2cm of you're barrel length.
  • 0

ramicaza <- My Youtube Channel
User avatar
pneumaticcannons
Major
Major
 
Posts: 392
Joined: Sat Oct 30, 2010 9:45 am
Location: shite country in asia
Reputation: 0

Previous

Return to Construction Materials/Ammo Discussion

Who is online

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

Reputation System ©'