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 74 users online :: 4 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], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Sprinkler Pneumatic Valve in Hybrid ?

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Sprinkler Pneumatic Valve in Hybrid ?

Unread postAuthor: sigmounte » Thu Aug 24, 2006 9:15 am

Hi !

I'm french excuse my english if it is not perfect , i'm planning on making an hybrid gun , i got some questions about it :

i don't want to use burst disc so i'm thinking about this : eletric valve sending air pressure to a pneumatic sprinkler valve and synchronised with the stun gun

Do you think this is possible ? (also i will use detector to allow the stun gun to shot only if the sprinkler valve have started to open )
  • 0


sigmounte
Private
Private
 
Posts: 8
Joined: Thu Aug 24, 2006 8:10 am
Reputation: 0

Unread postAuthor: Velocity » Thu Aug 24, 2006 9:38 am

It has been done (DR used a sprinkler valve on his first hybrid, right?), but honestly, its a pretty bad idea. A SCH 80 union is able to hold much, much more pressure than a sprinker valve, and gives greater flow too. Also, not only is there the possibility that the sprinkler valve will explode, the diaphragm may easily pop as well.

For simplicity, cost (in the long run, I suppose), performance, and safety's sake, just use the union (or cam-locks). The only thing you gain with a sprinkler valve is the ability to fire quicker (due to not having to reload a burst disk)
  • 0

User avatar
Velocity
Brigadier General
Brigadier General
 
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm
Reputation: 0

Unread postAuthor: drac » Thu Aug 24, 2006 10:04 am

Faster unless you tear the diaphragm out.. then you're forked.

It would be simpler to have a popoff valve on the sprinkler to actuate at a certain pressure, but the sprinklers still aren't rated to more than 125 (i took mine up to 160 once, but I'm lucky it didn't fail).

Go with a union or cam locks as rmich said.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: LucyInTheSky » Thu Aug 24, 2006 10:04 am

Wpuld the pressure not just push the diaphram up and fire it without you having to use electrics.
  • 0

If your getting chased off a police dog, try not to run through a tunnel then onto a small see-saw then through a ring of fire. They are trained for that!
User avatar
LucyInTheSky
1st Lieutenant
1st Lieutenant
 
Posts: 293
Joined: Fri Apr 21, 2006 11:46 am
Reputation: 0

Unread postAuthor: sigmounte » Thu Aug 24, 2006 3:45 pm

Ok , you convince me , i will use burst disc , my chamber will be in metal , so i'll use the stainless steel coupling cam lever , so it will allow me an higher pressure than the PVC one ?
  • 0


sigmounte
Private
Private
 
Posts: 8
Joined: Thu Aug 24, 2006 8:10 am
Reputation: 0

Unread postAuthor: sigmounte » Thu Aug 24, 2006 3:54 pm

is their a rapid way to make burst disc ?
  • 0


sigmounte
Private
Private
 
Posts: 8
Joined: Thu Aug 24, 2006 8:10 am
Reputation: 0

Unread postAuthor: Velocity » Thu Aug 24, 2006 5:02 pm

to make them or to reload them? Either way, no. You could probably easily come up with a way to make burst disks quickly, but to reload them quickly is another story...
  • 0

User avatar
Velocity
Brigadier General
Brigadier General
 
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: sigmounte » Thu Aug 24, 2006 5:10 pm

My question is about making them , what do you use ?
  • 0


sigmounte
Private
Private
 
Posts: 8
Joined: Thu Aug 24, 2006 8:10 am
Reputation: 0

Unread postAuthor: drac » Thu Aug 24, 2006 8:25 pm

Paper plates are cheap and can be made at a reasonable rate. That or aluminum foil would be my best bet
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: M3NT4L » Thu Aug 24, 2006 8:45 pm

Depends on your barrel or wherever the disk is going to go diameter. Pressures are aswell a factor, low pressure paper then alluminium foil and then my favorite for hybrids alluminium can.
  • 0

Image
User avatar
M3NT4L
2nd Lieutenant
2nd Lieutenant
 
Posts: 239
Joined: Wed Jul 05, 2006 7:40 pm
Reputation: 0

Unread postAuthor: Velocity » Thu Aug 24, 2006 8:45 pm

HDPE is what makes the soda bottles, and a circle of HDPE has a bursting pressure of around 150 PSI I think
  • 0

User avatar
Velocity
Brigadier General
Brigadier General
 
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm
Reputation: 0

Unread postAuthor: huse_spud » Thu Aug 24, 2006 8:46 pm

i bet if you could get ur hands on a butterfly valve it would work great with a hybrid. i saw a 6" butterfly valve on mythbusters. shot a steel ball like 1/2 a mile using steam power,
  • 0

User avatar
huse_spud
1st Lieutenant
1st Lieutenant
 
Posts: 269
Joined: Sat Apr 15, 2006 6:52 pm
Location: Center Junction, IA
Reputation: 0

Unread postAuthor: M3NT4L » Thu Aug 24, 2006 8:54 pm

I know. That was the sickest sht EVER. I convinced my dad to help me with a supersonic all metal (large diameter) helium filled golfball barrel. Why the gb barrel? because i found copper balls that fit perfectly.
  • 0

Image
User avatar
M3NT4L
2nd Lieutenant
2nd Lieutenant
 
Posts: 239
Joined: Wed Jul 05, 2006 7:40 pm
Reputation: 0

Unread postAuthor: sigmounte » Fri Aug 25, 2006 9:05 am

Ok after a night without sleeping i think i've found a way to make an Hybrid without burst disc and with instant opening time ( < 1 ms) , with easy loading also

i have to test the method and if i'm still alive in 2-3 day this mean the method is working and i will give the plan here
  • 0


sigmounte
Private
Private
 
Posts: 8
Joined: Thu Aug 24, 2006 8:10 am
Reputation: 0

Unread postAuthor: Jolly Roger » Fri Aug 25, 2006 9:58 am

I'm currently in the early stages of designing my own hybrid. I'm building mine just like a piston pneumatic cannon except instead of placing the solenoid valve (sprinkler vlave) at the back of the cannon, I hope to use three 100psi saftey "pop" valves used on steamers etc. Everything else would be the same as a normal hybrid (if I can call any hyrbid normal). This way I won't have to worry about replacing burst disks every round or worry about the safety of the sprinkler valve.
  • 0

User avatar
Jolly Roger
Donating Member
Donating Member
 
Posts: 210
Joined: Fri Aug 25, 2006 4:20 am
Reputation: 0

Next

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'