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| Zeus |
 Posted: 07/01/2010 23:49 PM Post subject: $37AUD Hybrid |
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Colonel
Joined: 27 Oct 2009
Posts: 748
1862.08 Spud Bux
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Yesterday I designed a hybrid (in my head). I ended up in a hardware
store 4 1/2 hours ago. This is the result.
It still needs the spark gap, cable gland & one way valve.
I want to install a 1/4 inch NPT shrader, instead of binary adhesives.
And the specs
15mm bore (at the moment)
45cm barrel
45cc chamber
20mm burst disc
1-5X mix
That's about the sum of it, so let me know if I've missed anything
or if you want to know something.
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| Sorry, the photo is terrible |
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| The chamber, handle & union |
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| A closeup of the union. Anyone seen one like it? |
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Last edited by Zeus on 10/27/2010 15:44 PM; edited 2 times in total |
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| jackssmirkingrevenge |
| Posted: 07/02/2010 0:43 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18051
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| Does the barrel have a seam through it? How do you plan on installing the ignition?
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| Zeus |
| Posted: 07/02/2010 0:49 AM Post subject: |
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Colonel
Joined: 27 Oct 2009
Posts: 748
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The barrel is seamed, but I plan to wad the projectiles. Also, ignition
will be machined HDPE with a M3 25mm bolt.
It's low voltage ignition, so insulation isn't much of a problem.
Thanks for replying.
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| jackssmirkingrevenge |
| Posted: 07/02/2010 0:51 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18051
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Ah, a couple of firings and the seam will probably wear smooth anyway  good luck with making it happen. Is it going to be hand-held or mounted?
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| chinnerz |
| Posted: 07/02/2010 0:53 AM Post subject: |
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Lieutenant Colonel
Joined: 28 Dec 2009
Posts: 469
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Nice work mate!
Can't wait to see it shoot
It's always nice to see a fellow Aussies creations.
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| Zeus |
| Posted: 07/02/2010 0:55 AM Post subject: |
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Colonel
Joined: 27 Oct 2009
Posts: 748
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Handheld, the damn barrel was the most expensive part, I couldn't get the 7.5mm 100cm aluminium tube that I wanted, couldn't find the 12mm
150cm copper either.
[Edit: thanks chinnerz, I should have it going by Monday]
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| ilovefire |
| Posted: 07/02/2010 3:36 AM Post subject: |
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Colonel
Joined: 22 May 2010
Posts: 518
882.18 Spud Bux
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hey looks good, you going to make a stock for it? love to see it when its finished
and if you dont mind me asking how much was the chamber and end caps?
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| Zeus |
| Posted: 07/02/2010 20:50 PM Post subject: |
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Colonel
Joined: 27 Oct 2009
Posts: 748
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Thanks, I might make a wire frame stock, the end caps were $1.69 &
the chamber was $7.80.
If you (or anyone else) is in Aus, let me know and I'll PM you the hardware store name.
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| Crna Legija |
| Posted: 07/02/2010 21:51 PM Post subject: |
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shots shots shots
Joined: 20 Jul 2008
Posts: 1912
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| its probly bunnings, im from aus
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| chinnerz |
| Posted: 07/02/2010 21:54 PM Post subject: |
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Lieutenant Colonel
Joined: 28 Dec 2009
Posts: 469
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| I think that's cheaper than my bunnings.
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| Crna Legija |
| Posted: 07/02/2010 22:01 PM Post subject: |
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shots shots shots
Joined: 20 Jul 2008
Posts: 1912
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idk the excact price but its about that for me, im from melbourne tho. i also work there so i get 10% discount 
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| Zeus |
| Posted: 07/03/2010 0:53 AM Post subject: |
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Colonel
Joined: 27 Oct 2009
Posts: 748
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Nope, Home Hardware all the way (sorry -_-). I'm from Central Vic
so I went to Bendigo.
The union was $5.80, and there was 25mm unions as well, so I've got
a source for my light gas gun build.
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| auspud |
| Posted: 01/30/2011 3:48 AM Post subject: |
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Private
Joined: 22 Jan 2011
Posts: 4
19.26 Spud Bux
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| you could use a old 12g or 20g shot gun barrel weld it to a nut . that way you could have a really smooth inside & use shotgun wads as your sabot . + then use solid slugs or shot . i have been told 20g is the same as .577 - 58 cal & paint balls .
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| linuxexorcist |
| Posted: 01/30/2011 5:11 AM Post subject: |
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Corporal
Joined: 30 Mar 2008
Posts: 62
190.02 Spud Bux
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| Zeus wrote: | | I want to install a 1/4 inch NPT shrader, instead of binary adhesives. |
Really JSR? nothing to say on that?
less than $50 for a hybrid? I think that's awesome, might look into it
I probably would use copper pipe for the barrel, as this handy guide shows, it can take hybrid pressures.
How do you intend to meter your fuel and pressurize the cannon?
From the copper tube handbook in the link
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| jackssmirkingrevenge |
| Posted: 01/30/2011 5:20 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18051
32498.46 Spud Bux
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| linuxexorcist wrote: | Really JSR? nothing to say on that?
less than $50 for a hybrid? I think that's awesome, might look into it |
All I can say is that there is probably less than $10 of material in any of the hybrids I've built so far
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