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auto-piston prototype

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 18, 2008 11:02 pm

ALIHISGREAT wrote:
Naturally, but would it be as compact and, more importantly, as cheap?


no and no... but it would work :wink:


iho de puta :p

Touche ;) but I'll make this one work, promise - just as long as I can find enough time away from my latest purchase :D
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Unread postAuthor: ALIHISGREAT » Sat Jan 19, 2008 2:38 am

iho de puta :p


hmm well from my extensive knowledge of languages that looks like spanish, if it is then 'puta' means 'tramp' and as far as i can tell this is 'iho' :lol: http://www.iho.shom.fr/

but after further investigation in spanish there is a word 'ido' which is as close as i can find to 'iho' (i suppose it could be a verb) but 'ido' means; absent minded or crazy, nuts (loco) or drunk... so i think its something about a crazy drunk tramp?
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Unread postAuthor: jackssmirkingrevenge » Sat Jan 19, 2008 2:57 am

"iho" should have been spelt "hijo", alas my written Spanish is far worse that my spoken.

May I refer the honourable gentleman to this amusing exchange from Blackadder II, episode 6 - in this case, "perra" can be substituted with "puta":

Torturer: Batardo

Blackadder: Batardo... Barrister?

T: Batardo...

B: Embarrassing.

The torturer jumps off the rostrum and mimes walking with a big pregnant belly. He then mimes cradling a baby in his arms before chucking it away... Basically it's turned into a game of charades.

You're embarrassing. I'm embarrassing. Erm, rogering! Pregnant? Baby... bathwater... sounds like... bastard! Ah. (at last he's got it) I'm a bastard.

T: Si. Esterminado hijo, hijo.

B: Donkey.

T: Padre y hijo.

B: Big bastard. Little bastard.

T: Padre

The torturer mimes panting.

B: Son. I'm a bastard son.

T: Di perra.

B: I'm a bastard son. I'm a thirsty barking bastard.

T: No, perra

He barks.

B: Oh, dog, dog.

T: No...

Mimes breasts.

B: Woman

The torturer mimes woman and dog simultaneously.

No, woman dog... ah, [female doggy]. I'm a bastard son of a [female doggy].

T: Si! Si!

He shakes Blackadder's hand, happy at their mutual success. A triumph for international communication.

B: In that case, you are a fornicating baboon.

T: Que?

B: Oh, dear. You...

T: Tu... o... you.

B: Fornicating... (begins to mime) Yes, I can't really do it in this box.


On a more relevant footnore, the modified prototype is ready for testing once the epoxy cures, results to be announced within the next 24 hours.
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 20, 2008 8:09 am

HAHA! I MADE IT WORK!

[youtube]http://www.youtube.com/watch?v=zqtG9Vha1PQ[/youtube]

(make sure your sound's on)

Ok, so it broke while I was filming it, but before this clip I had it roaring *dakka dakka dakka dakka* at 110 psi, W00t!

The crack from the piston is really sharp, not really audible in the vid.

Finally, a small smattering of success in a sea of failure :D
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Unread postAuthor: Carlman » Sun Jan 20, 2008 8:18 am

yay this is a true marvel, now on to consistancy :D

but in all seriousness, this must make you feel like all the hard work and like 40 versions of an automatic piston valve payed off, now hurry up and fix it :D
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Unread postAuthor: Carlman » Sun Jan 20, 2008 9:01 am

accidental double post *ignore*
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Unread postAuthor: ALIHISGREAT » Sun Jan 20, 2008 9:42 am

bravo, i hope you can fix it and unfortunatly i can't watch the vid on this compuotr for some reason so i will have to watch it later :(
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Unread postAuthor: SPG » Sun Jan 20, 2008 9:58 am

Hmmmm, what red hands you've got, must be an epoxy allergy :wink:

Excellent to see it working (sort of) now it's just tweaking.
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Unread postAuthor: Antonio » Sun Jan 20, 2008 3:24 pm

jackssmirkingrevenge wrote:*dakka dakka dakka dakka* at 110 psi, W00t!


Damn I like this man!! The sounds it makes and all. The popping sound even sounds like a good cycle rate; not too fast. I am keen to seeing the final product, and to what improvements u made now. Awesome!
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Unread postAuthor: LikimysCrotchus5 » Sun Jan 20, 2008 3:36 pm

Well all i can say is good for you! :)

You must be really happy after all those failed attempts. But those failures lead to a success which means you have to fail before succeding.

Now just to make it work properly.
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 20, 2008 6:25 pm

Fixed it again yay :D

[youtube]http://youtube.com/watch?v=ouWuAy42kCM[/youtube]

This is at lowish (50 psi or so) pressure, it's too late to fire up my compressor, hence the lower rate of fire. Also, I'm keeping the pop-off spring compressed manually with my thumb, which is why it varies.

Thank you all for the compliments, I knew I'd make it some day :D now to give it a proper adjustable mechanism, and then hook it up to the blow forward breech and see how well it does for power :) watch this space.

what red hands you've got, must be an epoxy allergy


Yeah, it's like kryptonite to me :p that's the lighting
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Unread postAuthor: ALIHISGREAT » Sun Jan 20, 2008 6:31 pm

damn thats cool, i cn't wait to see it attached to something to see what it can do :twisted:
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Unread postAuthor: MrCrowley » Sun Jan 20, 2008 6:40 pm

JSR made something work! :shock:

Praise the lord :D

It sounds really good, can't wait to see it finished.
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Unread postAuthor: VH_man » Sun Jan 20, 2008 7:07 pm

what exactly went wrong before jsr? just wondering...

im exited for this........ VERY exited. If this works im replicating it.........
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 20, 2008 7:17 pm

MrCrowley wrote:JSR made something work! :shock:

Praise the lord :D


Oh COME ON, I've made lots of things work! I've only had a string of failures lately because I took on something a bit more complex, if I had stuck to making ordinary piston cannons like you lot I'd have had success after success :D but seriously, after this, I need to make me a nice single shot launcher, I was thinking of a suppressed 3/4" piston design, sawn-off style (yes, I really liked that movie!)

what exactly went wrong before jsr? just wondering...


The rubber disk that the pop-off valve seals against came off, I simply stuck it back on with araldite.

I made a removable cap for the pop-off, the epoxy's curing as we speak. when that's done, a simple push-fit into the breech will allow primary testing so I'll what sort of power I can expect. If that goes well, I'll make a hopper mag et voila :D
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