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 67 users online :: 5 registered, 0 hidden and 62 guests


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

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

piston probs :(

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Unread postAuthor: mopherman » Sun Jun 03, 2007 9:28 pm

Is it possible that those skrews are protruding too far into the inside of the tee? That would restrict piston movement.
  • 0

User avatar
mopherman
Brigadier General
Brigadier General
 
Posts: 788
Joined: Sat Feb 03, 2007 8:20 pm
Reputation: 0

Unread postAuthor: experament-u2 » Mon Jun 04, 2007 8:54 am

mopherman wrote:Is it possible that those skrews are protruding too far into the inside of the tee? That would restrict piston movement.


i never thought of that being the problem il open her up soon and take a look and do some measuring but here's a concept iv being working on

(the dark green tube not labeled in the diagram is 1/4 300psi bit of air hose)
  • 0

Attachments
piston2.JPG
User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Unread postAuthor: spudthug » Mon Jun 04, 2007 9:15 am

there u go that should work...how r u keeping the air hose firm? hope uget it working!
  • 0

4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
User avatar
spudthug
Brigadier General
Brigadier General
 
Posts: 936
Joined: Mon Feb 26, 2007 9:02 pm
Location: johnsonburg, Pa USA
Reputation: 0

Unread postAuthor: Spuddin » Mon Jun 04, 2007 9:15 am

hey thx for all the pics experament-u2 they helped me understand how a piston works. now i can try to make one but i think mine will have a trigger release in the back. it will lock forward in the sealed position and spring loaded to open. maybe. anyway thx.
_______________________
www.freewebs.com/spuddin
  • 0

User avatar
Spuddin
Donating Member
Donating Member
 
Posts: 262
Joined: Wed May 16, 2007 1:28 pm
Location: Oklahoma
Country: United States (us)
Reputation: 0

Unread postAuthor: experament-u2 » Mon Jun 04, 2007 9:29 am

Spuddin wrote:hey thx for all the pics experament-u2 they helped me understand how a piston works. now i can try to make one but i think mine will have a trigger release in the back. it will lock forward in the sealed position and spring loaded to open. maybe. anyway thx.


im glade my work has done some good 8)
i like your idea i would like to see a diagram of your desgin

spudthug wrote:there u go that should work...how r u keeping the air hose firm? hope uget it working!


the air hose is pretty thick and in a short length stays pretty straight and firm
  • 0

User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Unread postAuthor: spudthug » Mon Jun 04, 2007 9:34 am

did u try it yet? if u have everything u should try it...if this is ur first piston gun then u will be surprised on how much power they ahve and how fun they are...
  • 0

4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
User avatar
spudthug
Brigadier General
Brigadier General
 
Posts: 936
Joined: Mon Feb 26, 2007 9:02 pm
Location: johnsonburg, Pa USA
Reputation: 0

Unread postAuthor: experament-u2 » Mon Jun 04, 2007 9:40 am

spudthug wrote:did u try it yet? if u have everything u should try it...if this is ur first piston gun then u will be surprised on how much power they ahve and how fun they are...


well its 12 pm here now so i think il do it tomorrow
this is my second piston gun, my first was a little bb gun that rocked until the oring on my piston broke and iv being unable to find another one the same size (oh and yes that is 2 tee's epoxied together)

heres a pik of it without the trigger system on
Image
  • 0

User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jrrdw » Mon Jun 04, 2007 7:53 pm

Open question --

How much pressure do you think the epoxie will hold?
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: mopherman » Mon Jun 04, 2007 8:36 pm

jrrdw wrote:Open question --

How much pressure do you think the epoxie will hold?

well, jack has successfuly taken epoxie to 400 psi. but that was an itsy bitsy glob. i would guess you should be good around 80.
  • 0

User avatar
mopherman
Brigadier General
Brigadier General
 
Posts: 788
Joined: Sat Feb 03, 2007 8:20 pm
Reputation: 0

Unread postAuthor: experament-u2 » Tue Jun 05, 2007 12:39 am

iv takeen it past 100 heaps of times and its shown no stress marks or cracking and still looks perfectly fine
  • 0

User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Unread postAuthor: chaos » Tue Jun 05, 2007 5:31 am

That BB is sweet U2, man i hope ya get ya piston problem solved mate it will be another great aussie piece (as always :lol: ) when its done :D

to bad ya o-ring broke on ya bb that is a great little gun ya got there i hope you fix it soon 8)

peace
chaos
  • 0

User avatar
chaos
Brigadier General
Brigadier General
 
Posts: 1205
Joined: Wed Jan 17, 2007 8:31 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Jun 05, 2007 5:54 am

Nice to see someone else veering away from standard parts and getting their hands dirty with epoxy, looking good U2 :)

If I could make a suggestion though, this is how I put the seal on the barrel of my small 3/4" pistons (making another one at the moment ;) )

The diagram should be pretty much self explanatory.
  • 0

Attachments
untitled.jpg
untitled.jpg (19 KiB) Viewed 218 times
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: experament-u2 » Tue Jun 05, 2007 6:38 am

jackssmirkingrevenge wrote:Nice to see someone else veering away from standard parts and getting their hands dirty with epoxy, looking good U2 :)

If I could make a suggestion though, this is how I put the seal on the barrel of my small 3/4" pistons (making another one at the moment ;) )

The diagram should be pretty much self explanatory.


so the sealing face is on the barrel not the piston?
or is there one on both?

oh and off topic what is your display picture jack?
EDIT: i just noticed its a tablet of some kind
  • 0

User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Jun 05, 2007 7:02 am

the sealing face is on the barrel only, a bit like my pengun project.

My display picture is a pistol cartridge in a pill packet, made it from a photo entitled "sleeping pill".
  • 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: experament-u2 » Tue Jun 05, 2007 8:22 am

jackssmirkingrevenge wrote:the sealing face is on the barrel only, a bit like my pengun project.

My display picture is a pistol cartridge in a pill packet, made it from a photo entitled "sleeping pill".


kool 8)
  • 0

User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'