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The Build File.

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.
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The Build File.

Unread postAuthor: rna_duelers » Sat Sep 01, 2007 9:50 pm

I have been designing and comtemplating this hybrid build for a long time,I finally got off my lazy ass and started the build!

2nd Sep- These are early days and I have just prepped the chamber and added the threads for the fuel/air injection.There is alot of work to do on it yet and this picture is just a rough outline of what it could look like,the fuel system was just thrown together but hey atleast it's something.

This is going to be a Diary to say of the build hopefully with updates on the build every week or so.
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Tadah!This was taken with a camera phone,so sorry fi the quality is poor.
Last edited by rna_duelers on Sun Sep 02, 2007 11:43 pm, edited 1 time in total.
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Unread postAuthor: experament-u2 » Sun Sep 02, 2007 12:57 am

its looking great so far rna
i know ill be watching its progress
good luck with the projects
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Unread postAuthor: wannabie » Sun Sep 02, 2007 1:19 am

Lookin' good so far :P

What kinds of mixes do you think you'll be using?

Where did you get your chamber from? And where did you get your reg from and how much.
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Unread postAuthor: MrCrowley » Sun Sep 02, 2007 2:44 am

Wouldn't that rounded end on the chamber be a [female doggy] to calculate for the fuel meter?
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Unread postAuthor: rna_duelers » Sun Sep 02, 2007 4:43 am

@Crow-I'm going to do it the manual way,with water and some measuring instruments.

@wunnabie-I made it myself,its mainly parts that I have had lying around from other cannons and air compressor fittings etc.
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Unread postAuthor: noname » Sun Sep 02, 2007 11:03 am

MrCrowley, when making a hybrid, you pretty much need to fill the chamber with water, or do other kind of measurement that's accurate to the milliliter. If you just go on SpudTool and say your chamber is something like 2" x 10," the gun will never work.
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Unread postAuthor: sergeantspud2 » Sun Sep 02, 2007 5:18 pm

I have a hybrid made from a SCBA tank (a fireman tank) and just roughly measured it with a ruler, then used the spudtool. I took it out a few weeks ago and it instantly fired every time. I measured the curve at the top then halved the volume formula and added it to the volume of the cylinder, also guesstimating that the chamber wall was at least 1/2" thick. Maybe I was just lucky.
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Unread postAuthor: rna_duelers » Sun Sep 02, 2007 11:41 pm

Thats lucky with the rough measurements to get it right first time.The wall thickness on this tank is 20mm if memory serves correct.

I'm going to get the fittings I need to finish the chamber this afternoon maybe,if I'm not to sick then its time to measure the chamber volume and get the correct meter size.
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Unread postAuthor: rna_duelers » Tue Sep 18, 2007 12:41 am

I've got the last bit of the chamber ready to go!It's a connector to BSP threads it's 40mm and made from Aluminium (yes it's a fitting for a cam lock)so it can be welded into the chamber with out any fuss.

Were there is machined bit of the fitting is were I plan to lathe cut off to make it shorter eand easyer to weld into the chamber.
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The fitting which will be welded into the chamber.
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Unread postAuthor: rna_duelers » Sun Sep 23, 2007 10:19 pm

The fitting cut and the chamber about to be machined ready for the welding of the fittings into the top of it.

Were the fitting will be welded,the fitting will be sitting flush against the chamber.
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Chamber and fitting.
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Unread postAuthor: Novacastrian » Mon Sep 24, 2007 3:25 am

Can we please have dimensions or capacities?
Looks awesome :P
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Unread postAuthor: rna_duelers » Mon Sep 24, 2007 6:09 am

You can have all of them soon,I most probably going to have the chamber welded and done in the next 3 days which is cool then I will be able to tell you chamber volumes etc.

But it is going to be 40mm porting,for golfballs and going to be used at many X mixtures and with oxidisers.Ohh and the chamber walls are 20mm Aluminium.

Just some info off the top of my head.
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Unread postAuthor: rna_duelers » Mon Oct 01, 2007 3:08 am

The build of this cannon ha been put on hold for a while,I have had a few things happen just recently that has FUKED the build.I got really drunk and fell in a water fountain screwed my phone,wallet,lighter and was pulled out just alive by a friend,got in three fights and was locked up by the police now some Kiwi's want revenge.Now I have to get all new sh!t like a phone and Bank Cards and what not,I also had a close family member die so I will not be on the forums for a while due to all of the reasons above and also halting the build of my Hybrid.

Always look for the good side of things.....Yeh right....
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Unread postAuthor: Killjoy » Tue Oct 02, 2007 12:47 am

now some Kiwi's want revenge

After readin this I suddenly had a craving for kiwis (the fruit).

I am really sorry to hear about you losing a close person in the family and the rest of the crap going on.
Good luck and I hope evrythign turns out reasonably well.
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Unread postAuthor: Modderxtrordanare » Sun Oct 07, 2007 9:56 am

Sell the hybrid?

I know I'd want that chamber. :twisted:
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