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New hybrid (w.i.p.)

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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New hybrid (w.i.p.)

Unread postAuthor: Labtecpower » Thu Dec 22, 2011 5:20 pm

I finished the combustion chamber of my new hybrid;

Image

Image

25 mm ID, 2.5 mm wall thickness. the chamber has a length of 20 cm, so I have plenty of volume :)
I wonder how well the supressor is going to work.. :roll:
This will be used at a 12x mix.

This feels quite strong when compared to my previous hybrid, I hope it will prove to be strong enough.
It will be shoulder fired after extensive testing, I'll probably keep the mixes low when doing so.

The epoxy has to cure now, so I can test it tomorrow. Vids will be uploaded :)
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Unread postAuthor: daniel0663 » Thu Dec 22, 2011 5:45 pm

:D

Thats awesome man, i've always wanted to see one similiar to this type of layout....

Looking forward to the vids.
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Unread postAuthor: MrCrowley » Thu Dec 22, 2011 5:53 pm

Is there any reason you went with the PVC plug over something a little more safe? I'm sure the plug will be fine but, personally, I would want something made of metal to ease my mind. If you couldn't get something machined, you could always weld some threads on to it.

Apart from that, looking good. I shall eagerly await for a video of it in action :)
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Unread postAuthor: Labtecpower » Thu Dec 22, 2011 6:09 pm

MrCrowley wrote:Is there any reason you went with the PVC plug over something a little more safe? I'm sure the plug will be fine but, personally, I would want something made of metal to ease my mind. If you couldn't get something machined, you could always weld some threads on to it


Electrical insulation :)

I use the valve as the spark plug.
The pvc has a thickness of 25 mm, so it should be totally save :)
Don't forget that the abs barrel you used held up fine :wink:
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Unread postAuthor: MrCrowley » Thu Dec 22, 2011 6:10 pm

Labtecpower wrote:Don't forget that the abs barrel you used held up fine :wink:
You should've gone with ABS then :D
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Unread postAuthor: Labtecpower » Thu Dec 22, 2011 8:45 pm

MrCrowley wrote:You should've gone with ABS then :D


harder to glue :wink:
pui without spelling mistakes
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Last edited by Labtecpower on Fri Dec 23, 2011 6:52 am, edited 1 time in total.
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Unread postAuthor: JDP12 » Thu Dec 22, 2011 9:18 pm

is this a coaxial hybrid as you said valve? What's your plans for metering, syringe?
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Unread postAuthor: jackssmirkingrevenge » Fri Dec 23, 2011 2:20 am

Finally, metal threads!

:D

Looking very good, this will be quite a mini power house!

MrC, nowt wrong with synthetic plugs as long as they're thick enough and properly glued.
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Unread postAuthor: Labtecpower » Fri Dec 23, 2011 6:54 am

First test shot :)

Image

We need to shoot a video worth uploading.
This was at a 3x mix, the bang was deafening even tough I wore earplugs.
Not nice for my headache :D
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Unread postAuthor: jackssmirkingrevenge » Fri Dec 23, 2011 7:02 am

Hahaha nice!

spaaaarkkkssss!!

What did you use as a burst disk?
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Unread postAuthor: Labtecpower » Fri Dec 23, 2011 8:02 am

Some messing around :D

[youtube]http://www.youtube.com/watch?v=wO_tSokKeYM[/youtube]

first shot 3x mix, second shot 4x, third 5x.
I use masking tape as a burst disk.

Now I just have to put one the barrel :)
it will be 12mm bore, I couldn't find anything larger that would fit in the connector :?
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Unread postAuthor: warhead052 » Fri Dec 23, 2011 11:49 am

Nice! The youtube snow function really adds an effect to it :D
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Unread postAuthor: Labtecpower » Fri Dec 23, 2011 5:38 pm

I epoxied on the barrel, but the damned thing doesn't work anymore :?

Mix is right (worked this morning), spark gap is right, ignition system is okay too..
cant figure it out!
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Unread postAuthor: pneumaticcannons » Fri Dec 23, 2011 10:41 pm

How long do you wait between the fill and the shot? I have an extremly small leak on mine that I haven't fixed yet and before I discovered it, I filled it, set up my target+camera (maybe took 2 minutes) and It didn't fire. Bugged the crap out of me for 3 more fills until I realized the problem. I highly suggest checking for leaks everywhere.
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 24, 2011 12:32 am

I agree with the leak hyphothesis, happens to me all the time :roll: Have you tried filling it and putting it under water?

Also, could it be that the electrode has been dislodged?
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