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semiauto MK III - vids

Built a pneumatic 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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Unread postAuthor: jackssmirkingrevenge » Sat Feb 06, 2010 2:15 am

Brian the brain wrote:Could you do a max ROF vid?


Hear hear, a couple of close range "mag dump" videos would be nice :)
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Unread postAuthor: POLAND_SPUD » Wed Feb 10, 2010 8:48 am

The scope is almost zeroed... I say almost as I still have to adjust it a little bit but I just didn't have time (right now at 20m it hits about 15cm too low and to the left). Well at least it isn't as horrible as it was before

I also added a vertical grip to the gun. Well I am not a big fun of vertical grips but the increased mass helped to reduce recoil.

[youtube]http://www.youtube.com/watch?v=cVRpAHVTlD0[/youtube]

EDIT
There is no double fed at the very beginning. Youtube does it
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Ohh BTW about that concrete columns... it seems I must have also hit them earlier but I didn't notice that.. I know it's not [i]military grade concrete [/i] (I guess I would have to ask MrCrowley as he has experience with that kind of stuff :wink: ) but it's still pretty cool that it can pell off small fragments of it.

I didn't have my cam there but you can probably see where it in in this zoomed it pic
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Unread postAuthor: POLAND_SPUD » Wed Feb 24, 2010 9:23 am

a couple of days ago I attached a 1/8" QEV to assist piloting (it wasn't on in this video) and as you can guess shots were much more consistent... anyway in the current configuration (the chamber acts as the stock) I fell that the triggering valve is exactly where it should be and the QEV would kind of ruin that...

so I think I'll try a bullpup design... which basically means that I have to move the scope anyway so I didn't bother to zero it the way it should be

BTW I forgot to add that this thing still has just a gravity mag... I ordered some springs but once they arrived I realized they are 35mm long not 35cm long FAIL :D




http://www.youtube.com/watch?v=TgGItPYCn6U
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Unread postAuthor: jackssmirkingrevenge » Wed Feb 24, 2010 3:17 pm

I like how the *thump* of each shot seems firmer now, good stuff :)

Can we have a video at closer range on say plywood with the camera close to the target? More impressive than flying snow ;)

I ordered some springs but once they arrived I realized they are 35mm long not 35cm long FAIL


If you ordered 10 of them you're fine :D
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Unread postAuthor: POLAND_SPUD » Wed Feb 24, 2010 7:47 pm

yeah I might.... I've been thinking of moving the compressor and my shooting range somewhere where I wouldn't have to worry that much about ricochets and onlookers for quite a long time...

now that I added polyamid tubing rated to 50 BAR to my filling station that should be much easier...

If you ordered 10 of them you're fine
nope even if I had ordered them it wouldn't help as the springs are muc too strong... oh well I might order custom made springs

no gun is 100% finished.. luckily the way it is built allows to improve it easily
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Unread postAuthor: jackssmirkingrevenge » Thu Feb 25, 2010 2:05 am

POLAND_SPUD wrote:I might order custom made springs


Have you considered making your own? I have a tutorial somewhere, I'll try and dig it up.
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Unread postAuthor: inonickname » Thu Feb 25, 2010 5:09 am

jackssmirkingrevenge wrote:
POLAND_SPUD wrote:I might order custom made springs


Have you considered making your own? I have a tutorial somewhere, I'll try and dig it up.


Yeah, but they generally require things like an oven to relieve/harden the spring in, special coiling equipment for alrger springs (read: lathe) and are not particularly safe.
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Unread postAuthor: budabob07 » Sun Nov 14, 2010 8:21 am

POLAND_SPUD wrote: oh well I might order custom made springs

you could just buy an airsoft spring mag for about 10 bucks on airsplat. you could then take it apart and get the spring (it should be pretty long, depending on the capacity of the mag you buy. btw nice gun
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Unread postAuthor: budabob07 » Mon Nov 15, 2010 8:56 am

i like the reloading mechanism. what size is the aluminum it's housed in. i might want to build one in an airsoft gun, and they sell solid blocks on ebay for around 2 bucks. i just want to know what size. thanks
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Unread postAuthor: POLAND_SPUD » Mon Nov 15, 2010 11:18 am

You've got the dimensions right here.Image
Of course, you can make your own for airsoft. You just have to take some measurments like air cylinder stroke, calibre, etc.

You can build something that works exactly like the block from threaded fittings. Just like this guy ->
http://www.spudfiles.com/forums/semi-au ... 21799.html
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Unread postAuthor: budabob07 » Mon Nov 15, 2010 3:21 pm

o wow fail i didnt notice the dimensions. sry!
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Unread postAuthor: Fnord » Mon Nov 15, 2010 3:56 pm

Why did you remove all the videos? I don't think I've seen this gun before.
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Unread postAuthor: POLAND_SPUD » Mon Nov 15, 2010 4:07 pm

ohh you must have seen it
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