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 64 users online :: 5 registered, 0 hidden and 59 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

177 czech spring air rifle conversion to mini combustable

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
Sponsored 
  • Author
    Message

177 czech spring air rifle conversion to mini combustable

Unread postAuthor: Fexo180 » Wed Nov 02, 2011 1:15 am

I was gifted a couple of broken down 177 cal air rifles... the tiny little czech plinker i am considering gutting out the spring/piston assembly and making it a mini combustible.
Any design thoughts would be appreciated this is only at the 'thought' stage.
I was thinking with the compression tube just blocking the back end with a spark plug and using a spark igniter wired for ignition, place at the trigger bed so the trigger falls back onto the switch...for fuel as a quick fix i can just squirt or syringe measure tiny amounts of butane gas lighter down the air exit port... with a slug in the breech it will seal the old piston chamber.

load, squirt, close, aim, fire.

Thoughts?
  • 0

User avatar
Fexo180
Specialist
Specialist
 
Posts: 42
Joined: Wed Oct 26, 2011 8:07 am
Location: Australia
Reputation: 0

Unread postAuthor: Crna Legija » Wed Nov 02, 2011 1:19 am

Doubt it will make enough pressure to get the pellet out the barrel.
  • 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: Fexo180 » Wed Nov 02, 2011 1:25 am

8 inch long x 1 inch od chamber .. barrel 13 inch x .177 cal (4.5mm?) ?
  • 0

User avatar
Fexo180
Specialist
Specialist
 
Posts: 42
Joined: Wed Oct 26, 2011 8:07 am
Location: Australia
Reputation: 0

Unread postAuthor: Crna Legija » Wed Nov 02, 2011 1:48 am

idk how much pressure a normal springer makes but im guessing 250-350psi, a normal combustion makes around 100psi.
  • 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: Zeus » Wed Nov 02, 2011 3:39 am

A cheap springer makes around 1000PSi and up, a high end springer is more like 2000PSI and up.

It'll push the pellet out, but it won't have much power. Try to fix the springer mech on one, and diesel it. Put a drop of diesel or kerosine behind the pellet or in the chamber, and fire as normal. It only needs a drop, more won't ignite.

A link on dieseling, they don't recommend it, but it works very well. http://thefiringline.com/forums/showthread.php?t=449640
  • 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: jackssmirkingrevenge » Wed Nov 02, 2011 4:19 am

Agreed, power will be excrement... as a 1x combustion - but if you go hybrid, that's a different story ;)
  • 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: Crna Legija » Wed Nov 02, 2011 5:20 am

Zeus wrote:A cheap springer makes around 1000PSi and up, a high end springer is more like 2000PSI and up.


Wow wasn't expecting that.

Zeus wrote:and diesel it. Put a drop of diesel or kerosine behind the pellet or in the chamber, and fire as normal. It only needs a drop, more won't ignite.


Dam one guy brought a .117 to camp on the long weekend it was the first springer iv ever shot i was gonna do it but forgot now im regretting it. Probably lucky i didn't though its over 20 years old..
  • 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

Sponsored

Sponsor
 


Unread postAuthor: Fexo180 » Wed Nov 02, 2011 7:25 am

Zeus wrote:A cheap springer makes around 1000PSi and up, a high end springer is more like 2000PSI and up.


:shock: Dayem!
  • 0

User avatar
Fexo180
Specialist
Specialist
 
Posts: 42
Joined: Wed Oct 26, 2011 8:07 am
Location: Australia
Reputation: 0

Unread postAuthor: wyz2285 » Wed Nov 02, 2011 3:25 pm

After reading this, I felt interested in buy a spring pellet gun :P
From the link that Zeus gave, 1500 fps for a pellet sounds great :D
  • 0

User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: turner » Wed Nov 02, 2011 5:14 pm

do a search on davidsfarm and bb guns. he fills it with acyelene and oxygen from a cutting torch. also people put oil on the skirts of pellets to have it combust.
do you have pictures of the pellet guns? ive been looking for a slavia. if you still have any extras lol
  • 0


turner
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Fri Aug 07, 2009 11:48 pm
Reputation: 0

Unread postAuthor: Zeus » Thu Nov 03, 2011 7:11 pm

I'm sorry, but davidsfarm is terminally stupid, pants on head retarded, with the IQ of a dead lizard.

Acetylene detonates under pressure, it doesn't burn. Compressing it with oxygen puts shrapnel into your face very quickly.

Enter JSR with a blown up airgun picture, I couldn't find a picture of one where the plunger tube exploded.
  • 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: jackssmirkingrevenge » Mon Nov 07, 2011 1:22 am

Zeus wrote:Enter JSR with a blown up airgun picture, I couldn't find a picture of one where the plunger tube exploded.


I've never seen pictures or even heard of one actually turning into a grenade, but I have seen springers that have been ruined because the compression tube blew out like it had been inflated slightly.

Worth pointing out at this point that some airguns were designed to diesel.
  • 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 » Mon Nov 07, 2011 1:29 am

jackssmirkingrevenge wrote:I've never seen pictures or even heard of one actually turning into a grenade, but I have seen springers that have been ruined because the compression tube blew out like it had been inflated slightly.


I've seen a couple where the darwinian owner fueled it with oxygen and a fuel, it actually killed the owner if I recall correctly.

But I can't remember for the life of me where I saw it.
  • 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: jackssmirkingrevenge » Mon Nov 07, 2011 4:09 am

Zeus wrote:I've seen a couple where the darwinian owner fueled it with oxygen and a fuel, it actually killed the owner if I recall correctly.

But I can't remember for the life of me where I saw it.


Ah, you mean these - but they were pneumatics filled with oxygen.

Image

Image

If I recall correctly the Darwin Award candidates involved were seriously injured but survived.
  • 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 » Mon Nov 07, 2011 4:14 am

No, I've seen those, this was another set of a springer which was dieseled with oxygen. I "think" it was an airgun forum, but I can't be sure.

Would the adibatic heating from the gases compressing between the pellet and valve cause that? Including the steel oxidising rapidly and lubricant igniting naturally.
  • 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

Next

Return to BB/Airsoft/Pellet Gun Discussion

Who is online

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

Reputation System ©'