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 75 users online :: 5 registered, 0 hidden and 70 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

"In the world of spuds today"

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

Re: "In the world of spuds today"

Unread postAuthor: Gippeto » Wed Dec 18, 2013 12:01 am

9mm 22xx running on a hipac can be done...do not expect it to be cheap. :wink: You might find a DAQ 9mm upper (receiver, bolt and barrel) for a few hundred...if you're lucky...I believe they are no longer in production.

Performance with a bore that large would be better if you secured the valve and bulked the tube rather than used the Hipac ... due to potential for increased volume available at the valve face. You have to actually utilize that potential of course. :wink:

More $$$ :shock:

Unless....you can do it yourself. :)

.308" rifle based (somewhat :wink: ) on a QB78.

Image

.310" pistol based (somewhat :wink: ) on a 22xx.

Image
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Re: "In the world of spuds today"

Unread postAuthor: tigerblues28 » Wed Dec 18, 2013 12:13 am

I bet both of them pack a serious punch. I was thinking of building something like a 9mm with a Lothar Walther barrel (28'' for $178 I think..) :shock: , a big old' 1 inch brass coaxial valve with a co2 12g adapter until I move up to HPA.
Or a hammer valve of sorts, with a good sized amount of flow. I don't have any machining equipment and custom parts like a receiver and a hammer w/ trigger is a boat load of money, and takes the fun out of the build, IMHO. 8)

For now, ideas.... along with a .22 full auto hammer valve blow back gun, similar to the all mighty Caselman, a 9mm bore Hybrid with onboard metering propane.

I'm working on a coaxial slide valve combo, with a 6.03mm tight bore and a hop-up for airsoft sniping.

Its good to keep the mind busy :D


EDIT: Lets see a pistol grip on that "rifle based" QB78...
  • 0

User avatar
tigerblues28
Staff Sergeant
Staff Sergeant
 
Posts: 104
Joined: Mon Apr 01, 2013 12:56 pm
Country: United States (us)
Reputation: 3

Re: "In the world of spuds today"

Unread postAuthor: Gippeto » Wed Dec 18, 2013 12:50 am

You could also contact Mike at TJ's Enterprises for a barrel....will likely cost you less than the LW, but will require you to do some bore polishing to get the best accuracy. Can also get greater lengths than from LW....Mike does charge a premium for 30"+ but it's still affordable.

Price is by the inch and I don't have my price sheet handy.

How good can these barrels be when everything is in harmony?

https://www.youtube.com/watch?v=wd9GXcrnZrM

Google will provide a phone number for TJ's.

Trigger groups for Crosman or QB products run around the $30 mark....hardly a boat load. :)

Edit: Thinking thumbhole stock for the QB...black walnut or zebra wood...haven't decided yet.
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Wed Dec 18, 2013 8:55 am

Nice... need to get my hands on one of these and "breath on it" :)
  • 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

Re: "In the world of spuds today"

Unread postAuthor: mark.f » Wed Dec 18, 2013 11:02 pm

jackssmirkingrevenge wrote:Nice... need to get my hands on one of these and "breath on it" :)


I "breathed" on a 1377, although without machine tools and pretty much plug-n-play parts.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Wed Dec 18, 2013 11:14 pm

Do you know if the 1377 valves are different from the 1322, the latter doesn't seem as easy to find.

edit: nevermind, found it online. OMG I am close to purchasing my first legal airgun without the need for a license!

Edit: Gippeto, 2240 posts lol!
  • 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

Re: "In the world of spuds today"

Unread postAuthor: mobile chernobyl » Tue Dec 31, 2013 11:14 am

ITWOST

Bought a 3D printer.

Amongst many other things, I will be printing some discarding sabot's (The front portion, the pusher plate will be a harder material of course haha) to hopefully put this guy down range some day sooner then never!

Image
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Re: "In the world of spuds today"

Sponsored

Sponsor
 


Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Wed Jan 01, 2014 6:47 pm

Nice, good luck with it!

Which one did you go for?
  • 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

Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Wed Jan 29, 2014 1:03 pm

Something that I've been playing it over the past couple of days, converting a Milsig K-series paintball marker to take RAP4 DMAG 20 round magazines, worked out pretty well.



some photos of the mods done:

milk1.jpg


On the marker body itself, lower rails next to the paintball port milled off to allow the DMAG to enter the magwell enough to click against the catch.

milk2.jpg


Bottom view of modified magwell showing white delrin spacer and tab to open feed lip

milk3.jpg


Top view of modified magwell showing area milled out to allow mag entry

milk4.jpg


External view of feed lip tab bolted on.

milk5.jpg


Magazine follower modification (modified follower on the left) showing steel pin to limit travel

milk6.jpg


Comparison of modified magazine on the right and unmodified magazine on the left showing travel limit in order to stop the last ball being chopped by the bolt.
  • 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

Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Sat Feb 01, 2014 12:39 pm

This monstrosity just came into the shop for repairs :roll:

tshirtlauncherwithspecialneeds.jpg


edit: looks like it was made by these guys: https://aircannons.com/cannons.php
  • 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

Re: "In the world of spuds today"

Unread postAuthor: Ragnarok » Sun Mar 09, 2014 12:44 pm

I decided I really wanted to blow something up today.

So, I took some scrap 1.5mm steel (from some computer cases I recently threw out) and cut it up so I could bolt four layers of the stuff together:
CIMG0394_800.jpg
I know it's not that impressive a target - it's only mild steel and it'd be a lot stronger if it weren't in layers, but I'd guess it's probably still capable of catching many pistol rounds.

The full arrangement was as follows, with some water jugs behind and some concrete as a final backstop:
CIMG0393_800.jpg

And, of course, there's a video:

And so, one hole through some steel plates:
CIMG0397_800.jpg

And some holes through the water jugs too:
CIMG0398_800.jpg

Watched closely, the video shows the penetrator bounce off the rear backstop, bounce again off the concrete to the left side pieces, then again off the water jugs before landing in the grass. With that in mind, I'm fairly sure it would have had the energy left to go through more water jugs if I had more spare - I don't know how many though, as it was starting to turn sideways in the third jug. (However, treating water as an injury analogue, a three inch long penetrator going sideways would certainly have some interesting effects.)
  • 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

Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Sun Mar 09, 2014 7:17 pm

Impressive! what did the projectile look like?
  • 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

Re: "In the world of spuds today"

Unread postAuthor: Ragnarok » Sun Mar 09, 2014 8:46 pm

A marginally modified version of this design that I've shown before.

The primary difference was angled fin edges and a rounded base to the penetrator - which was mostly to see if it was easier to make fins for that design (turns out it is, as I can just drill a hole in the plastic sheet, rather than faffing around trying to cut square holes).

Basically, if you take the long range darts I was trying to design years ago, this is a baby version that I'm using to experiment with the overall design; It's tamed down by using masonry nails as the penetrator - they're (mostly) ready shaped and hardened, which saves on experimentation effort, but it does reduce the diameter to 3.5mm rather than the full-fat 6mm (although the sectional density and velocity have been kept the same for testing).

The original had the fins slot into the penetrator (rather than vice versa) which was good for aerodynamics, as the fins didn't need to take the forces of passing several thousand Gs of acceleration to the penetrator and could therefore be thinner to reduce cross section.
However, it's more effort to make it that way and the returns of a small decrease in drag (as most of the drag on these is actually friction based, not pressure based) are irrelevant at the distances I can actually use this at. So I'm redesigning a bit.
  • 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

Re: "In the world of spuds today"

Unread postAuthor: jakethebeast » Sun Apr 06, 2014 4:18 pm

Started on a new particle accelerator today!

Old but rust and dent free fire extinguisher tank was welded (by my welder) to a 200mm long 1" pipe nipple, and has an Y-piston valve, followed with 3" barrel.

https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-prn2/t1.0-9/1375989_10202610780182762_5649680333134277519_n.jpg

Just a mockup for a pic, the valve will be switched around to work as a chamber sealing one, and needs a separate fill for pilot/airchamber.. Will work pretty much like a piston hybrid, but this valve has some serious flow...
  • 0

Est Sularus Oth Mithas
User avatar
jakethebeast
Brigadier General
Brigadier General
 
Posts: 934
Joined: Sat Jul 03, 2010 4:20 pm
Location: Jakes cave
Country: Finland (fi)
Reputation: 11

Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Mon Apr 07, 2014 6:27 am

Image

hahaha sweet. Hey where did all your snow go?!
  • 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

PreviousNext

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'