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 78 users online :: 5 registered, 0 hidden and 73 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

11x burst disk

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

Unread postAuthor: DYI » Sat May 17, 2008 5:18 pm

I use 64 layer alu. foil disks in unmodified unions, but I don't think that you would have much luck trying to cut aluminum much thicker than that without sheet metal cutters, and you'd have some butt-ugly disks then. For 11x in a 2" union, you'd be looking at over 100 layers. Which would mean about 8 disks from a 100' long roll of 18" wide standard foil. Which likely isn't practical at all.

I got a high pressure rated forged steel 2" union from McMaster-Carr yesterday, and if the small tapered area was machined flat (which would be a very simple operation) you could make a copper/brass/lead gasket and use steel sheet as disks.

And I'm not planning on using flanges on any of my current projects because I haven't found any rated for more than 2500psi at the moment. If someone could direct me to a suitable 3" or 4" flange with a rating of 5000psi or more, I'd greatly appreciate it.

@Spudfarm: your hybrid is going to have a very poor reload time anyway, so it would likely be beneficial for you to just go with a flange, which would allow you to use whatever kind of disk you wanted.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: SpudFarm » Sat May 17, 2008 5:54 pm

i may make a flange if i don't get up with something else. so can you to get one high above 5000psi rated. i will cut the barrel in half near the chamber and weld on two 1/4" steel plates with bolts to make a flange
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: psycix » Sun May 18, 2008 6:43 am

I once saw a guy who used some sort of bolt action load to put burst disks in. I dont remeber how it was called, but he achieved a very high ROF for a hybrid.
Though that will probably not work with the pressures you are using unless done perfectly.
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: SpudFarm » Sun May 18, 2008 6:50 am

if anyone has seen the connection on the barrel on the hybrid that is what i think of but not with tose locks, i'll use screws
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Previous

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'