first hybrid

Harness the power of precision mixtures of pressurized flammable vapor. Safety first! These are advanced potato guns - not for the beginner.
User avatar
SpudFarm
First Sergeant 3
First Sergeant 3
Posts: 2571
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area

Donating Members

Fri Dec 07, 2007 11:52 am

now I am finally got my ass up and start build a hybrid!
the chamber is going to be a 8" long 2" steelpipe and a coil for ignition.
and then to the questions: i are using a standard ball valve to fuel it with air and propane and it isn`t rated that high! and if the valve is going up in flames is it just the sealings or does the whole valve blows up?

and 2nd: i am going to use a 1/2" copper barrel on about 4.5 feet is that just silly small or silly big? i dosent wanna have a loong barrel on it bechause its hard to transport.

last: how big mix would you use it on?

thanks for all answers
User avatar
Fnord
First Sergeant 2
First Sergeant 2
Posts: 2239
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Been thanked: 1 time
Contact:

Fri Dec 07, 2007 1:10 pm

Brass or steel ball valves are fine to use for hybrids. They are normally rated for 600 psi (like 40 bar) which is probably about the most you'll generate with "sane" mixes.

I have a similar sized barrel for my hybrid, and while it is extremely small in terms of efficiency, it will work fine for power.

People typically use mixes of around 6x in steel hybrids, but if you don't drill into the chamber you should be ok firing 7 or 8x remotely.
Image
User avatar
SpudFarm
First Sergeant 3
First Sergeant 3
Posts: 2571
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area

Donating Members

Fri Dec 07, 2007 5:26 pm

ok! i am thinking of making it handheld and for most 5x mix
User avatar
bigbob12345
Staff Sergeant
Staff Sergeant
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington

Fri Dec 07, 2007 9:16 pm

I would never recomend a handheld hybrid I recomend remote ignition
User avatar
MrCrowley
Moderator
Moderator
Posts: 10078
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Been thanked: 3 times

Fri Dec 07, 2007 9:32 pm

bigbob12345 wrote:I would never recomend a handheld hybrid I recomend remote ignition
Handheld hyrbids are perfectly safe, there is at least 3 or 4 of them on spudfiles.
sjog
Specialist 4
Specialist 4
Posts: 440
Joined: Sun Oct 15, 2006 9:43 pm
Location: Marthas Vineyard

Donating Members

Fri Dec 07, 2007 9:58 pm

iare spudfuarm i doznt wan tu llung berrel
i holeinna han iare OK??
User avatar
SpudFarm
First Sergeant 3
First Sergeant 3
Posts: 2571
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area

Donating Members

Sat Dec 08, 2007 7:49 am

sjog WTF are you talking about?
and for bigbob i am going to use it at max 5x so i feel perfectly safe about that, and have you seen the sch 40 steel pipe test?


Edit: here are the "burst test"

http://www.spudfiles.com/forums/viewtop ... 09c7bc7c3b
User avatar
DYI
First Sergeant 5
First Sergeant 5
Antigua & Barbuda
Posts: 2862
Joined: Sat Jul 07, 2007 8:18 pm
Location: Here and there

Sat Dec 08, 2007 10:24 am

Sjog is poking fun at your general ignorance, as well as poor grammar and spelling. A bit of research could have answered all of your questions and more. "I are" isn't proper English by any stretch, and it makes you sound retarded.
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
Fnord
First Sergeant 2
First Sergeant 2
Posts: 2239
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Been thanked: 1 time
Contact:

Sat Dec 08, 2007 10:58 am

Did it ever occur to either of you that English might not be his first language?

He obviously did do some research or he wouldn't be asking about hybrids in one of his first posts.
Image
User avatar
SpudFarm
First Sergeant 3
First Sergeant 3
Posts: 2571
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area

Donating Members

Sat Dec 08, 2007 1:13 pm

yes i am norwegian and i am not shamed of my english! you can try speak norwegian to me and see how many words you can get out of your mouth!

and i ask bechause we haven't the same pipes as in your country we dosent have sch ratings!! and thats the reason that i am going to ask if someone can tell me the wall thickness of a 2" sch 40 steel pipe!
User avatar
MrCrowley
Moderator
Moderator
Posts: 10078
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Been thanked: 3 times

Sat Dec 08, 2007 3:21 pm

Sorry about the members making fun of your English, I had a feeling it wasn't your first language but you can speak it pretty well. I know I learn German at school but when I went there I hardly spoke a word :oops:


Anyway, if Norway is like the rest of Europe the fittings could be in Metric, so you'll need to look for 50mm instead of 2" pipe and the pressure rating will probably be in BAR. I'm not familiar with metal pipe as much as PVC but if it doesn't have the rating on it just ask someone.

It could be on a sticker on the pipe saying DN50(50mm diameter) PN25(rated to 25BAR = 362.5 PSI)

You could try PMing a member called 'Brian The Brain'.
He's Dutch but is very familiar with metal pipe in Europe and speaks perfect English, so you could ask him what to look for.
Novacastrian
Staff Sergeant 2
Staff Sergeant 2
Posts: 1603
Joined: Sat Aug 11, 2007 6:59 pm
Been thanked: 1 time

Sat Dec 08, 2007 7:30 pm

MrCrowley wrote:
bigbob12345 wrote:I would never recomend a handheld hybrid I recomend remote ignition
Handheld hyrbids are perfectly safe, there is at least 3 or 4 of them on spudfiles.
I agree MrC, i think your estimate of 3 or 4 is a tad short of the real number though, i for instance own two myself :D
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.
sjog
Specialist 4
Specialist 4
Posts: 440
Joined: Sun Oct 15, 2006 9:43 pm
Location: Marthas Vineyard

Donating Members

Sat Dec 08, 2007 9:35 pm

spud farm SORRY I forgot that this is world wide
You'sounded' like a lazy American kid
It would be interesting to see the country name on our posts
User avatar
SpudFarm
First Sergeant 3
First Sergeant 3
Posts: 2571
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area

Donating Members

Sun Dec 09, 2007 10:22 am

thanks crowely!
but the pipe i ordered on the web (norwegian site) is what called black steel pipe (direct translation) and i think it is a seam on it is that a big mistake? and is the pipe that other members use seamless?
and one last question: is a black steel pipe rated lower than galvanized?
User avatar
MrCrowley
Moderator
Moderator
Posts: 10078
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Been thanked: 3 times

Sun Dec 09, 2007 4:33 pm

I think most metal pipe people on this forum use does have a seam.
When I was in America I only found seamed galv pipe, which just means if you're making a co-axial you may have some problems with the piston and the seam.

I'm not sure on that one, i'm sure someone else is though.
Post Reply