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 59 users online :: 5 registered, 0 hidden and 54 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

EHVH Mk 1-(warning large pictures)

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Unread postAuthor: frankrede » Wed Dec 12, 2007 11:23 pm

aaron1225 wrote:you should grind down those corners
I should not.
The flat edge holds it straight and works as a base.
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Unread postAuthor: TwitchTheAussie » Thu Dec 13, 2007 12:37 am

Just to be safe I'd MIG weld everything. Just to be safe. Other than that use a remote detonator and be careful with the spark plugs.
  • 0

Raise your horns if you love metal.
spudgunning is like sex, once you've tasted, you can't wait til next time.
-
CpTn_lAw
User avatar
TwitchTheAussie
Brigadier General
Brigadier General
 
Posts: 980
Joined: Tue Feb 06, 2007 3:23 am
Reputation: 0

Unread postAuthor: DYI » Thu Dec 13, 2007 4:23 pm

Did you read the entire topic Twitch? :P
The whole thing is MIG welded.

And what mixes do you plan on taking it to frank? It looks like it could take 20x easily.
  • 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: frankrede » Thu Dec 13, 2007 10:17 pm

Thats exactly what I have in mind.
Or atleast to the highest mix I can take it too with my air compressor
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Unread postAuthor: DYI » Thu Dec 13, 2007 10:46 pm

With everything accounted for, assuming excellent fueling techniques, 20x would be about 290 psi preignition. That must be one impressive compressor. If you have a normal compressor however, you could pressurise a tank with a homemade high pressure pump for the air source. Either that, or a regged HPA tank, but I think the first option would be cheaper.
  • 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: frankrede » Thu Dec 13, 2007 10:52 pm

DYI wrote:With everything accounted for, assuming excellent fueling techniques, 20x would be about 290 psi preignition. That must be one impressive compressor. If you have a normal compressor however, you could pressurise a tank with a homemade high pressure pump for the air source. Either that, or a regged HPA tank, but I think the first option would be cheaper.
Yea. I knew it was something crazy. I would figure something out.
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Unread postAuthor: SpudBlaster15 » Sun Dec 16, 2007 1:37 am

Questions:

1. How thick are the walls of the pipe you used?
2. What is the diameter of the pipe you used?
3. What grade of steel is the pipe?
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Sponsored

Sponsor
 


Unread postAuthor: Novacastrian » Sun Dec 16, 2007 5:19 am

DYI wrote:With everything accounted for, assuming excellent fueling techniques, 20x would be about 290 psi preignition. That must be one impressive compressor. If you have a normal compressor however, you could pressurise a tank with a homemade high pressure pump for the air source. Either that, or a regged HPA tank, but I think the first option would be cheaper.


Ok, i know that propane CAN start to turn liquid at around 90psi, having said that i have fueled my mini hybrid to 90psi with no troubles.
My question is this- at 290psi what is the chance of non-liquification?

Btw, great idea with the pre-pressurised tank DYI, i was looking for a simple way to pressurise hybrids in the field.
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: spanerman » Sun Dec 16, 2007 8:42 am

would keeping the chamber warm or cold, can never remember reduce the chances of liquification?
  • 0

Image

spanerman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 438
Joined: Sun Sep 17, 2006 2:54 pm
Reputation: 0

Unread postAuthor: DYI » Sun Dec 16, 2007 9:35 am

Due to the low propane:air ratio, I'm pretty sure that partial pressure would stop the propane from liquifying at any easily achievable mix. I don't know for sure though. I do know that a 20x mix would be really impressive.
  • 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: mark.f » Sun Dec 16, 2007 9:41 am

Some say that because of partial pressures, the propane will not liquefy in a propane:air mixture past 90 PSIG. They say it will take around 2,143 PSIG to liquefy it in a 4.2% mix. Don't know that for a fact, though.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: DYI » Sun Dec 16, 2007 10:08 am

Assuming that the pressure in a propane tank is around 110 psig, the limit imposed by that is a 183x mix, which would equate to ~2790 psig.
If we also assume that the partial pressure argument is correct (which I suspect it is, due to _Fnord's 11x tests), then it seems as though about 141x is the limit. I wonder what kind of pressure a 100x mix would generate?
  • 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: spanerman » Sun Dec 16, 2007 10:12 am

more than id want to be within a mile of :shock:
  • 0

Image

spanerman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 438
Joined: Sun Sep 17, 2006 2:54 pm
Reputation: 0

Unread postAuthor: DYI » Sun Dec 16, 2007 10:15 am

I'm guessing over 10kpsi in adiabatic conditions. Dammit, now you've got me wanting to build a 20x oxy/MAPP hybrid...
  • 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: spanerman » Sun Dec 16, 2007 11:02 am

^thank god your on a different continent to me :lol:
  • 0

Image

spanerman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 438
Joined: Sun Sep 17, 2006 2:54 pm
Reputation: 0

PreviousNext

Return to Hybrid Cannon Database

Who is online

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'