| Author |
Message
|
| jackssmirkingrevenge |
 Posted: 04/11/2012 14:58 PM Post subject: |
 |
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| King_TaTer wrote: | Aww, you should have went for the head!  But impressive nonetheless. |
Already perforated 
| Quote: | | Pic of the new suppressor? |
Nothing to see, it's a 50mm diameter tube. Same internal two chamber design as the "drainpipe".
|
|
| Back to top |
|
 |
|
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 3:18 AM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
After all the sabot/fin work I did for Petitlu here, decided to give it a go myself with this launcher. I used a mild steel shaft from a printer cartridge, not the hardest of metals and definitely not as hard as the 1/4" steel plate I was shooting at.
Shot at 18x, after the smoke cleared I was disappointed to see that not much was done to the plate. When I found the projectile though, I was very impressed - the amount of deformation is remarkable. It's also worth noting the extent to which the previously dead straight plate got bent.
This makes a point about hardness, nature always takes the path of least resistance and in this case it went to the deformation of the projectile as opposed to the penetration of the plate. I trust Petitlu will have better results with his much denser and harder tungsten carbide rod
| Description: |
|
| Filesize: |
202.74 KB |
| Viewed: |
26 Time(s) |
|
| Description: |
|
| Filesize: |
226.33 KB |
| Viewed: |
24 Time(s) |
|
| Description: |
| projectile fitted in sabot |
|
| Filesize: |
214.9 KB |
| Viewed: |
26 Time(s) |
|
| Description: |
| projectile core and what fragments of sabot and fins I was able to recover, along with the impact mark on the plate |
|
| Filesize: |
151.15 KB |
| Viewed: |
25 Time(s) |
|
| Description: |
| closeup of core and impact mark |
|
| Filesize: |
277.03 KB |
| Viewed: |
30 Time(s) |
|
| Description: |
|
| Filesize: |
168.2 KB |
| Viewed: |
25 Time(s) |
|
|
|
| Back to top |
|
|
| POLAND_SPUD |
| Posted: 04/15/2012 3:37 AM Post subject: |
|
|
Chief of Staff
Joined: 13 Oct 2007
Posts: 5036
13297.29 Spud Bux
|
| damn I am sure you forgot to put a piece of paper behind the plate to check if there was any spalling
|
|
| Back to top |
|
|
| MrCrowley |
| Posted: 04/15/2012 3:44 AM Post subject: |
|
|
Kaleun
Joined: 23 Jun 2006
Posts: 10038
12515.11 Spud Bux
|
| Did you ever put up a video of the large suppressor in action?
|
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 3:44 AM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| MrCrowley wrote: | | Did you ever put up a video of the large suppressor in action? |
The videos on the first page of this thread are all with the big suppressor.
POLAND, you can clearly see where the projectile hit on the other side of the plate, but there wasn't really any true spalling.
| Description: |
|
| Filesize: |
281.54 KB |
| Viewed: |
23 Time(s) |
|
| Description: |
|
| Filesize: |
118.78 KB |
| Viewed: |
24 Time(s) |
|
|
|
| Back to top |
|
|
| Crna Legija |
| Posted: 04/15/2012 4:04 AM Post subject: |
|
|
shots shots shots
Joined: 20 Jul 2008
Posts: 2351
2314.29 Spud Bux
|
| you should try with a drill bit or tap if you have one.
|
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 4:10 AM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| I think I'll leave the hardcore testing to Petitlu, made this shot literally behind a closed door firing the ignitor from another room, this isn't really the sort of stuff that can be done safely indoors.
|
|
| Back to top |
|
|
| DYI |
| Posted: 04/15/2012 7:26 AM Post subject: |
|
|
Rear Brigadier
Joined: 07 Jul 2007
Posts: 2845
2844.32 Spud Bux
|
| Quote: | this isn't really the sort of stuff that can be done safely indoors.
|
Oh really? 
With sufficient containment, anything in the tens of kilojoules range can be done indoors without much trouble.
Also, we've already seen what happens when you use a sharpened tap for this instead of mild steel. Not very interesting, really.
|
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 7:51 AM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| DYI wrote: | | With sufficient containment, anything in the tens of kilojoules range can be done indoors without much trouble. |
Fair enough, let's therefore rephrase it to say that I didn't want to bother setting up a temporary shielded range in my workshop
Where would this forum be if we only did things once? Never said I'm doing something radical here
|
|
| Back to top |
|
|
| DYI |
| Posted: 04/15/2012 8:23 AM Post subject: |
|
|
Rear Brigadier
Joined: 07 Jul 2007
Posts: 2845
2844.32 Spud Bux
|
| Quote: | | Fair enough, let's therefore rephrase it to say that I didn't want to bother setting up a temporary shielded range in my workshop |
What? You don't have one of those already?
| Quote: | | Where would this forum be if we only did things once? |
Moving forward
On a more serious note, I'm not, as you might have gathered, a big fan of custom made ammunition, where avoidable. Looking at the great barrels of custom sabots you've made recently, I'm guessing we don't share that sentiment.
|
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 9:35 AM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| DYI wrote: | | What? You don't have one of those already? |
Nope, hence my liberally ventilated furniture and pock-marked walls. Good thing we don't build houses out of drywall in epoxyland
| Quote: | | Moving forward |
Touché 
| Quote: | | On a more serious note, I'm not, as you might have gathered, a big fan of custom made ammunition, where avoidable. Looking at the great barrels of custom sabots you've made recently, I'm guessing we don't share that sentiment. |
Oh we do. We've all seen the "miniboy syndrome" at work. On the other hand, machining relatively simple shapes out of acetal isn't that much of a chore.
|
|
| Back to top |
|
|
| Petitlu |
| Posted: 04/15/2012 12:22 PM Post subject: |
|
|
Brigadier General
Joined: 03 Jun 2011
Posts: 807
1340.08 Spud Bux
|
Great!
Very good results at 18x, with Mix40 and tungsten ...
Why have placed the fins in a shoe?
|
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 12:32 PM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| Petitlu wrote: | | Why have placed the fins in a shoe? |
I wanted to use the same dimensions of fin that I'm sending you (12mm diameter) but since this is 0.75" I had to use a sabot.
|
|
| Back to top |
|
|
| Petitlu |
| Posted: 04/15/2012 12:49 PM Post subject: |
|
|
Brigadier General
Joined: 03 Jun 2011
Posts: 807
1340.08 Spud Bux
|
ok I understand better!
The dart arrived very straight, it's good!
|
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 04/15/2012 13:23 PM Post subject: |
|
|
aspiring machinist
Joined: 15 Mar 2007
Posts: 21755
40569.73 Spud Bux
|
| Petitlu wrote: | | The dart arrived very straight, it's good! |
Another reason why I wanted to try the same dimensions as tungsten carbide is much denser than steel, in your case the centre of gravity will move forward and make them even more stable in flight.
|
|
| Back to top |
|
|
|
|
