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 51 users online :: 7 registered, 0 hidden and 44 guests


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

Registered users: Baldyforks, Bing [Bot], Exabot [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

safety question 1 1/4 brass

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

safety question 1 1/4 brass

Unread postAuthor: jean » Sun Oct 27, 2013 7:20 pm

hi my question is how much x i can go with 1 1/4 brass? it was ratet to ~240psi water pressure. is it safe go up to 5x. it is for a riflr like gun. it will be the chamber and next to my head.
jean
  • 0

Attachments
2751x_700.jpeg

jean
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Thu Dec 13, 2007 12:23 pm
Reputation: 0

Re: safety question 1 1/4 brass

Unread postAuthor: dart guy » Sun Oct 27, 2013 7:33 pm

Few ideas, go to the hddt thread and input important info and see if it will over do the rating or fill one with air until it explodes and check the psi. Yay I feel useful :D
  • 0

when life gives you lemons... make root beer and leave the world wondering how you did that :D
User avatar
dart guy
Major
Major
 
Posts: 397
Joined: Mon May 13, 2013 7:54 pm
Location: not telling you
Reputation: 5

Re: safety question 1 1/4 brass

Unread postAuthor: jean » Sun Oct 27, 2013 7:43 pm

sorry dartguy but pressure tests arent usefull i think and i like it as a closed chamber wwhen it comes to safety so hggdt isnt need. dartguy it seems you have to learn a lot more before answer safety questions...
jean
  • 0


jean
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Thu Dec 13, 2007 12:23 pm
Reputation: 0

Re: safety question 1 1/4 brass

Unread postAuthor: Gun Freak » Sun Oct 27, 2013 9:36 pm

Some manufacturers are higher quality than others, and they differ in design and thus strength. Steel fittings are more popular in hybrids and are available in that size, why not use steel?
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Re: safety question 1 1/4 brass

Unread postAuthor: jean » Mon Oct 28, 2013 2:14 am

hi gun freak the t joint was a german fitting. it means it was dvgw rated with a safety factor of 4. i forget to ask how much x are the highest you like to go with this. steel is an option but for an musket like rifle it would be cool it is in brass. and may it is an option to go with copper like this below.
  • 0

Attachments
kupfer_Loetfitting_T_Stueck_ebay.jpeg

jean
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Thu Dec 13, 2007 12:23 pm
Reputation: 0

Re: safety question 1 1/4 brass

Unread postAuthor: jackssmirkingrevenge » Mon Oct 28, 2013 6:02 am

Brass is a better idea than copper.

The old rule of thumb with hybrids is 100 psi per x number, so you can estimate 500 psi in your case. A safety factor of 4 would mean that it would be reasonable to use the fitting you showed, though I would do some detailed modelling in HGDT to get a more realistic estimate.

What caliber do you you have in mind for your musket? If you go for something like 0.5" - 0.75", I can tell you that 5-10x will be insanely loud and all you will need in terms of power.

This was 0.75" at 9x for example:



Like pneumatics, it's the smaller calibers that need the extra boost for impressive penetration.
  • 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: safety question 1 1/4 brass

Unread postAuthor: jean » Mon Oct 28, 2013 6:46 am

hi jack i like to go for 20mm/1m for decent power. i know the 100psi rule but i am scare because it is just next to my head... tomorrow i am back at home and show the concept. its based on the .54 pistol i made but just hybrid. the copper t is rated to ~380psi for gas/water. the joints will be soldered.
jean
  • 0


jean
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Thu Dec 13, 2007 12:23 pm
Reputation: 0

Re: safety question 1 1/4 brass

Sponsored

Sponsor
 


Re: safety question 1 1/4 brass

Unread postAuthor: jean » Mon Oct 28, 2013 7:10 am

ok sorry for double post. here is the concept. i belive you understanding it. because of the 1 1/4 pump tube i think i cant go higher than 5x. jean

edit forgot to say the o-ring near the check valve is floating and works like a pump head.
  • 0

Attachments
2013-10-28 14.13.00.jpg

jean
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Thu Dec 13, 2007 12:23 pm
Reputation: 0

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'