| Author |
Message
|
| jackssmirkingrevenge |
 Posted: 12/28/2009 0:36 AM Post subject: |
 |
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21741
40532.97 Spud Bux
|
Great stuff!
| Insomniac wrote: | | I wonder how a large funnel on the inlet of the barrel would affect feeding? Seems it would increase the ROF but promote jamming. |
Since the BBs are constantly being agitated, I don't think jamming would be an issue.
| Quote: | | I've got a better question... how a detent or an oring would affect feeding... |
Definitely worth checking out 
| Quote: | | I tried attaching a pressure gauge to one of the unused ports but it didnt move. |
I remember attaching a gauge to this project, it hovered at around 20 psi from a 110 psi feed.
Again, keep up the good work! |
|
| Back to top |
|
 |
|
|
|
| jor2daje |
| Posted: 12/28/2009 2:39 AM Post subject: |
|
|
Lieutenant Colonel
Joined: 05 Oct 2008
Posts: 419
796.68 Spud Bux
|
Ill throw a cone and a detent on tomorrow before I scrap this pill container and start the vortex block, still looking for a solid block of something clear to machine it out of, any ideas? I was thinking a clear epoxy casting then acrylic skirts. Bought pack of clear bic pens for barrels today because I couldnt find any acrylic tubing.
Last edited by jor2daje on 12/28/2009 2:55 AM; edited 1 time in total |
|
| Back to top |
|
|
| SpudBlaster15 |
| Posted: 12/28/2009 2:39 AM Post subject: Re: The unofficial high-speed camera thread |
|
|
Major General
Joined: 18 Oct 2006
Posts: 2401
1549.30 Spud Bux
|
| Insomniac wrote: | | If you have videos of the fabled 'magic dust' or anything else that breaches forum rules, it might be a good idea to not directly link them here. |
Aw damn. 
Nobody on YouTube has high speed video of *good* magic dust, and I know some members here have access to the 'proper' chemicals. I for one would love to see a good video of such posted here. |
|
| Back to top |
|
|
| jor2daje |
| Posted: 12/28/2009 2:46 AM Post subject: |
|
|
Lieutenant Colonel
Joined: 05 Oct 2008
Posts: 419
796.68 Spud Bux
|
@insomniac
heres the acrylic box I made it works out really good, I tapped a hole in the back so I can use a remote release, I should have a long airpowered one coming from ebay soon.
@spudblaster
I just may have some magic dust you make with iodine crystals and a certain household cleaning material, Ill do some filming of, may be a little too fast though. |
|
| Back to top |
|
|
| inonickname |
| Posted: 12/28/2009 3:50 AM Post subject: |
|
|
Lieutenant General
Joined: 07 Dec 2008
Posts: 2641
6943.87 Spud Bux
|
| Quote: | I just may have some magic dust you make with iodine crystals and a certain household cleaning material, Ill do some filming of, may be a little too fast though.
|
It would be great to see some NI3 go off in slow-mo. Should be interesting to see |
|
| Back to top |
|
|
| CS |
| Posted: 12/28/2009 4:05 AM Post subject: |
|
|
Donating Moderator
Joined: 18 Feb 2005
Posts: 1875
5918.19 Spud Bux
|
jor2daje, to make funnel/cone could you flare the clear pen tubes with hot oil over a metal cone? Alike how the PVC rockets are made. Couldn't use a metal funnel, but I'm sure a metal cone could be found for the job.
edit:
Of course this would make the barrel shorter, so besides coupling the tubes together it might not be much of an option.
Another issue of such a short barrel is your not getting the back pressure you'd find in a typical longer barrel launcher adding variables. So perhaps a way to couple several tubes together? Sure I'm making the ownership of a high speed camera more of a plague... Sorry.
Last edited by CS on 12/28/2009 4:16 AM; edited 1 time in total |
|
| Back to top |
|
|
| Insomniac |
| Posted: 12/28/2009 4:05 AM Post subject: Re: The unofficial high-speed camera thread |
|
|
Major General
Joined: 18 Dec 2006
Posts: 1296
49.78 Spud Bux
|
| SpudBlaster15 wrote: | | Insomniac wrote: | | If you have videos of the fabled 'magic dust' or anything else that breaches forum rules, it might be a good idea to not directly link them here. |
Aw damn.
Nobody on YouTube has high speed video of *good* magic dust, and I know some members here have access to the 'proper' chemicals. I for one would love to see a good video of such posted here. |
What I meant was that people performing said experiments could leave them on their channel without actually embedding the videos here. I suppose it might be acceptable, depending on the chemical and the purpose it's being used for. Ask PCGUY.
| jor2daje wrote: | @insomniac
heres the acrylic box I made it works out really good, I tapped a hole in the back so I can use a remote release, I should have a long airpowered one coming from ebay soon.
@spudblaster
I just may have some magic dust you make with iodine crystals and a certain household cleaning material, Ill do some filming of, may be a little too fast though. |
Nice work on the box, looks like it would be perfect for filming stuff like water bombs which tend to spray everywhere. (I always have to just keep my distance and use the zoom).
Funnily enough I also have some elemental iodine for the very same purpose... I asked one of the science teachers at school about how to obtain it, to which he replied 'Ah, you want to make *name of said substance*?' and gave me some. Still haven't gotten around to trying it though, but I'll be sure to get it on high-speed when I do. |
|
| Back to top |
|
|
| CpTn_lAw |
| Posted: 12/28/2009 4:40 AM Post subject: |
|
|
Your friendly scientist
Joined: 11 Sep 2005
Posts: 980
569.21 Spud Bux
|
|
| Back to top |
|
|
| jrrdw |
| Posted: 12/28/2009 5:32 AM Post subject: |
|
|
Donating Moderator
Joined: 16 Nov 2005
Posts: 5957
9925.89 Spud Bux
|
Exploding orange.....NICE!  |
|
| Back to top |
|
|
| psycix |
| Posted: 12/28/2009 6:08 AM Post subject: |
|
|
Donating Member
Joined: 25 Jun 2007
Posts: 3701
59332.61 Spud Bux
|
It seems like all port placements have their moments of repeated successful feeding and moments of no successful feeds.
I wonder what the cone and vortex block will do.
I'd also like to see a longer barrel, ridiculously long if you can (over 1 meter) so we can see the effects of a BB being in the barrel (does it choke flow, cause a pressure buildup and prevents other BB's to be sucked in?)
@Cptn_law
Cool.
I like the first orange most. It looks like the pressure wave causes the shell to tear on the sides. |
|
| Back to top |
|
|
| CS |
| Posted: 12/28/2009 6:27 AM Post subject: |
|
|
Donating Moderator
Joined: 18 Feb 2005
Posts: 1875
5918.19 Spud Bux
|
Wild-card line: Might I suggest Giorgio Moroder - Chase for acquisition of 8:24 of pristine high speed footage?
Proper respect if you know where this theme song comes from, other than Midnight Express of course. |
|
| Back to top |
|
|
| CpTn_lAw |
| Posted: 12/28/2009 6:30 AM Post subject: |
|
|
Your friendly scientist
Joined: 11 Sep 2005
Posts: 980
569.21 Spud Bux
|
No, in fact the sinkers do this, it's where they went through. they are really fast, you can see them if you look closely, from right to left.
The exploding orange on a side note...it all appears within one frame at 1200 fps. |
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 12/28/2009 7:33 AM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21741
40532.97 Spud Bux
|
| psycix wrote: | | I'd also like to see a longer barrel, ridiculously long if you can (over 1 meter) so we can see the effects of a BB being in the barrel (does it choke flow, cause a pressure buildup and prevents other BB's to be sucked in?) |
Judging by my bulged copper barrels (about one metre long), it seems that two BBs in a long barrel is possible, certainly with a detent. My guess is that a BB is fired from the breech but airflow is immediately blocked by the next BB, trapping the first one in the barrel until the next one hits it, causing the barrel deformation. |
|
| Back to top |
|
|
| jor2daje |
| Posted: 12/28/2009 10:14 AM Post subject: Re: The unofficial high-speed camera thread |
|
|
Lieutenant Colonel
Joined: 05 Oct 2008
Posts: 419
796.68 Spud Bux
|
| Insomniac wrote: |
Funnily enough I also have some elemental iodine for the very same purpose... I asked one of the science teachers at school about how to obtain it, to which he replied 'Ah, you want to make *name of said substance*?' and gave me some. Still haven't gotten around to trying it though, but I'll be sure to get it on high-speed when I do. |
haha before I made it I did the exact same thing but my science teacher said it was way to unstable and I shouldnt try it, so I used the internet  |
|
| Back to top |
|
|
| Ragnarok |
| Posted: 12/28/2009 12:34 PM Post subject: |
|
|
Lord of Karma
Joined: 19 Dec 2006
Posts: 5158
16113.53 Spud Bux
|
| jackssmirkingrevenge wrote: | | My guess is that a BB is fired from the breech but airflow is immediately blocked by the next BB, trapping the first one in the barrel until the next one hits it, causing the barrel deformation. |
Unlikely to happen with a tightbore barrel though - you'll get something like happens with springers, with the air between the two BBs compressing - and obviously, that'll speed up the first, and slow the second.
I'd wager that with a good barrel, it's near impossible to result in such a jam.
Actually, on the note of BBMGs, I keep meaning to finish the "Cyclone" design I came up with a couple of years back. |
|
| Back to top |
|
|
|
|
