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 60 users online :: 4 registered, 0 hidden and 56 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

Hybrid Ball Valves

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

Hybrid Ball Valves

Unread postAuthor: Grignacke » Wed Nov 10, 2010 8:34 pm

Hey guys. I'm building a hybrid, plan to take it up to 10X - 15X, and I have the fueling system inline with the chamber, as with other cannons I've seen in the showcase. Thing is, will a ball valve between chamber and fueling system have to be steam rated, or will a rating for inert gases suffice? In addition, what kind of pressures do you expect from a hybrid upon ignition?

I also have a couple of other questions, mainly so I don't die / waste oodles of money.
1) In fueling, I read the sticky on the subject, and I understand how to put propane inside and how much I need depending on chamber volume, but when filling it with air to compensate for the extra propane, since the pressure gauge I'd be going off of is either on the compressor or is the same meter that I'd be using for propane, should I take into account that the pressure of air is both chamber and brass fittings that are the fueling system?

2) Does the fact that a hybrid is essentially an artillary piece necessictate
some sort of permit / legal documents? I mean, if I go to a secluded place to fire, then no one will most likely care too much, but just to be on the safe side... :P

Phew. That's alot of q's. Thanks in advance, and have a great week, guys!
  • 0

User avatar
Grignacke
Private First Class
Private First Class
 
Posts: 33
Joined: Sun Jun 20, 2010 3:26 pm
Reputation: 0

Unread postAuthor: Zeus » Wed Nov 10, 2010 9:15 pm

Well I think downloadingHGDT might help.

Also, fire the hybrid somewhere people will think that it's a 12 gauge, the further away from non-spudders, the better.

Have fun

Lachlan
  • 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: Grignacke » Wed Nov 10, 2010 9:34 pm

Is there a HGDT for mac? I checked it out awhile ago and it said he had not porting to mac D:
  • 0

User avatar
Grignacke
Private First Class
Private First Class
 
Posts: 33
Joined: Sun Jun 20, 2010 3:26 pm
Reputation: 0

Unread postAuthor: Crna Legija » Wed Nov 10, 2010 10:25 pm

the preessure will be about 100psi per x so for 15x its 1500psi. It would be a bit less but better safe then, well dead.
  • 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: ramses » Wed Nov 10, 2010 10:35 pm

Grignacke wrote:Is there a HGDT for mac? I checked it out awhile ago and it said he had not porting to mac D:


no. you could try WINE, an emulator, virtualbox, bootcamp, etc.

sooner or later you'll see the light and go windows (or linux)

I use whatever ball valves are sold at Home Depot ($5) and ace ($10!!!)

The 1/4" ball valves at Harbor Freight are really cheap and rated to 600PSI like the rest of them. I may buy 5-10 next time I go. They're seriously that cheap. The ball valve is probably one of the least likely components to blow, as long as you use a small one. Someone blew the seal on a 1"-2" one in a hybrid, but they're still alive. :D
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Unread postAuthor: Grignacke » Thu Nov 11, 2010 6:30 am

For the record, I do have an opensuse machine that only boots in safe mode... Muhahaha
  • 0

User avatar
Grignacke
Private First Class
Private First Class
 
Posts: 33
Joined: Sun Jun 20, 2010 3:26 pm
Reputation: 0

Unread postAuthor: qwerty » Thu Nov 11, 2010 4:05 pm

the preessure will be about 100psi per x so for 15x its 1500psi. It would be a bit less but better safe then, well dead.



You sure about that?

I always thought a 1x mix was 4% gas and the normal atmosphere
2x = 8% and 14.7psi
3x = 12% and 29.4psi

I know that isn't perfectly accurate but it's along those lines i think.

so a 15x would be about 147psi not 1500.
  • 0

I visit occasionally to make unrelated posts.
User avatar
qwerty
Colonel
Colonel
 
Posts: 677
Joined: Sun Apr 12, 2009 2:16 am
Location: Evesham, Worcs
Country: United Kingdom (uk)
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: MrCrowley » Thu Nov 11, 2010 4:10 pm

He's talking about peak combustion pressure, not pre-ignition pressures.

edit: Pre-ignition pressures for a 15x mix would be over 200PSI by the way, not 147.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: ramses » Thu Nov 11, 2010 5:46 pm

147 would be an 11x mix, ignoring the pressure of propane, which is about .62 PSI per X. It makes a difference.
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'