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Another mini hybrid (R.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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Another mini hybrid (R.I.P)

Unread postAuthor: Labtecpower » Sun Aug 28, 2011 4:04 am

I want to build a piston hybrid, so to get some experience with construction and fueling, I made a small hybrid. Inspired by JSR's hybrids of course :D

I fuel it with a syringe. Uses 1,8 ML of butane per mix number.

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[youtube]http://www.youtube.com/watch?v=w12NLRHeaZQ[/youtube]

[youtube]http://www.youtube.com/watch?v=y8QWLExEQIE[/youtube]
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Last edited by Labtecpower on Sat Nov 12, 2011 11:16 am, edited 2 times in total.
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Re: Another mini hybrid

Unread postAuthor: jackssmirkingrevenge » Sun Aug 28, 2011 4:09 am

Labtecpower wrote:Inspired by JSR's hybrids of course :D


...down to the plastic electrical connector as a burst disk holder :D good stuff, moar mix numbers!
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Unread postAuthor: MrCrowley » Sun Aug 28, 2011 4:12 am

It's a hybrid, and I like hybrids so... good job! :D
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Unread postAuthor: jackssmirkingrevenge » Sun Aug 28, 2011 4:13 am

By the way, you haven't told us about calibre and projectiles? If you did, I missed it.
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Unread postAuthor: Labtecpower » Sun Aug 28, 2011 4:17 am

It's ugly as a turd, but I think i'll make something better when the schools start again.

Probably will be a pistol or something like that..


@ JSR:

Calibre is 10 mm. I'm shooting 5 gram pieces of steel, the barrel is 40 centimeters long.
HGDT says the velocity is around 150 m/s, wich I find pretty nice :)

(GGDT=HGDT
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Unread postAuthor: Labtecpower » Sun Aug 28, 2011 8:36 am

I decided too shoot the meme family :D

Image

Sadly my hybrid blew up at the first shot :D

[youtube]http://www.youtube.com/watch?v=1TcFoE6kDT4[/youtube]
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Unread postAuthor: jackssmirkingrevenge » Sun Aug 28, 2011 8:42 am

Very well drawn I have to say :)

Labtecpower wrote:Sadly my hybrid blew up at the first shot :D


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The fact that you used "blew up" and ":D" in the same sentence means that you are now a true builder of epoxy based hybrids, congratulations!
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Unread postAuthor: Labtecpower » Sun Aug 28, 2011 8:48 am

It gave a very nice bang, luckily I was wearing ear protection :roll:

jackssmirkingrevenge wrote:The fact that you used "blew up" and ":D" in the same sentence means that you are now a true builder of epoxy based hybrids, congratulations!

jackssmirkingrevenge wrote:Very well drawn I have to say :)


Thanks for both compliments :D


I'm going to reconstruct the thing with some screws through the chamber side into the back plug. Should help with containing pressure.
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Unread postAuthor: Labtecpower » Sun Aug 28, 2011 12:41 pm

Update:

Fixed the thing. I inserted some screws, so it will either have to break the screws or rip the tube to launch the back plug.

Now the front is the weakest part.... :roll:

I think i'm ordering 400 ml's of epoxy in a while :)

Image

By the way, if you turn up the volume after the bang in the video, you can hear the neighbour kids yelling :D luckily we have nice neigbours, so I won't have to expect police coming to my house....
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Unread postAuthor: jackssmirkingrevenge » Mon Aug 29, 2011 1:40 am

Labtecpower wrote:Now the front is the weakest part.... :roll:


Might as well add some screws while you're at it, learn from others' mistakes ;)
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Unread postAuthor: Labtecpower » Mon Aug 29, 2011 3:33 am

The back plug might have blown out because I forgot the epoxy while I inserted it :roll: :D

I use 1-hour epoxy, so i'm ready for some testing. I don't think sad troll and Y U No guy will survive. :)
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Unread postAuthor: jackssmirkingrevenge » Mon Aug 29, 2011 3:48 am

Labtecpower wrote:I forgot the epoxy while I inserted it


That's what.... he said? Hmmm...

:roll: :D

How did it hold pressure then? or is there an o-ring somewhere?

I use 1-hour epoxy, so i'm ready for some testing. I don't think sad troll and Y U No guy will survive. :)


1 hour epoxy needs at least 3 hours to be fully cured ;)
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Unread postAuthor: Labtecpower » Mon Aug 29, 2011 3:54 am

It had over 12 hours of curing, don't worry :D

jackssmirkingrevenge wrote:How did it hold pressure then? or is there an o-ring somewhere?


I was wondering why it was leaking so badly. I closed all the leaks with epoxy, and it held pressure just fine. Now I don't have a single leak at the first try, so it should be better.
Also made the spark gap smaller, it's 0,3 mm now.



I ran a GGDT calculation for an 8x shot.

Image

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

This shot went through the mp4 player, the 7 cm of newspapers, and almost through the one inch piece of plywood, with an energy of about 177 joules :)

More impressive than I tought :)
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Unread postAuthor: Labtecpower » Mon Aug 29, 2011 2:32 pm

I did some extra calculations, and I discovered I used twice as much fuel as I should have. I think this is why I found the power a bit sloppy.

Another vid:

[youtube]http://www.youtube.com/watch?v=LQfVaganB5U[/youtube]

I also bought a new barrel. The previous one had a 10 mm bore, and was 40 cm long. The new one has a 11 mm bore, and is 100 cm long.
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Last edited by Labtecpower on Mon Aug 29, 2011 2:38 pm, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Mon Aug 29, 2011 2:36 pm

LOL @ the mp3 player, that would have killed in high speed!

My mini was just 5.5mm/6mm bore, as you have twice that you can enjoy similarly high muzzle energies without necessarily going right up to 28 mix.

I take it the bug has been caught and we will be seeing more?

I did some extra calculations, and I discovered I used twice as much fuel as I should have. I think this is why I found the power a bit sloppy.


Feel free to publish them for scrutiny ;)
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