I finished the combustion chamber of my new hybrid;
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..
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
Posted: Thu Dec 22, 2011 5:45 pm
by daniel0663
Thats awesome man, i've always wanted to see one similiar to this type of layout....
Looking forward to the vids.
Posted: Thu Dec 22, 2011 5:53 pm
by MrCrowley
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
Posted: Thu Dec 22, 2011 6:09 pm
by Labtecpower
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
Posted: Thu Dec 22, 2011 6:10 pm
by MrCrowley
Labtecpower wrote:Don't forget that the abs barrel you used held up fine
You should've gone with ABS then
Posted: Thu Dec 22, 2011 8:45 pm
by Labtecpower
MrCrowley wrote:You should've gone with ABS then
harder to glue pui without spelling mistakes
Posted: Thu Dec 22, 2011 9:18 pm
by JDP12
is this a coaxial hybrid as you said valve? What's your plans for metering, syringe?
Posted: Fri Dec 23, 2011 2:20 am
by jackssmirkingrevenge
Finally, metal threads!
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.
Posted: Fri Dec 23, 2011 6:54 am
by Labtecpower
First test shot
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
Posted: Fri Dec 23, 2011 7:02 am
by jackssmirkingrevenge
Hahaha nice!
spaaaarkkkssss!!
What did you use as a burst disk?
Posted: Fri Dec 23, 2011 8:02 am
by Labtecpower
Some messing around
[youtube][/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
Posted: Fri Dec 23, 2011 11:49 am
by warhead052
Nice! The youtube snow function really adds an effect to it
Posted: Fri Dec 23, 2011 5:38 pm
by Labtecpower
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!
Posted: Fri Dec 23, 2011 10:41 pm
by pneumaticcannons
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.
Posted: Sat Dec 24, 2011 12:32 am
by jackssmirkingrevenge
I agree with the leak hyphothesis, happens to me all the time Have you tried filling it and putting it under water?
Also, could it be that the electrode has been dislodged?
