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Short question topic

A place to ask general spud cannon related questions.
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Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Fri Apr 05, 2019 2:14 pm

Our Stratasys Dimension is still running... bit out of your price range though.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: Short question topic

Unread postAuthor: wyz2285 » Fri Apr 05, 2019 2:24 pm

I'd rather have this matter solved within 1k, but if something around the 3k range that is a true work horse I'd take it.
currently looking at the cr-10 pro then have a custom build enclosure and temperature control.
Or Just order a 500x500x500 ball screw structure...
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Re: Short question topic

Unread postAuthor: farcticox1 » Tue Apr 09, 2019 6:29 pm

Would a piece of O ring material work as a hop up ? or would it be too hard ? I need it more to stop the BB's rolling down the barrel as well.

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Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Wed Apr 10, 2019 7:21 am

It should work, this design is used in several airsoft models.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: Short question topic

Unread postAuthor: jimmy101 » Wed Apr 10, 2019 4:07 pm

You could also just use a neodymium magnet if you are just trying to keep the BBs from rolling out'a the barrel.
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Re: Short question topic

Unread postAuthor: farcticox1 » Wed Apr 10, 2019 5:45 pm

Airsoft BBs
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Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Thu Apr 11, 2019 6:43 am

farcticox1 wrote:Airsoft BBs


Then use a plastic magnet duh

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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: Short question topic

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Re: Short question topic

Unread postAuthor: farcticox1 » Thu Apr 11, 2019 5:39 pm

got it. :o
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Re: Short question topic

Unread postAuthor: farcticox1 » Fri Apr 12, 2019 7:06 pm

Anybody tried this air bleed idea as a hop up ? downside is it bleeds of some air but there is nothing to wear, a rubber sleeve covering the hole could be used as adjustment :idea:

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Re: Short question topic

Unread postAuthor: wyz2285 » Sat Apr 13, 2019 10:11 am

Oh boy if you start digging into hop up that amount of bullshit you're gonna find...
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Re: Short question topic

Unread postAuthor: farcticox1 » Sat Apr 13, 2019 12:17 pm

Tried the rubber hop up thing, it seems to work, at about 120 feet using the scope I can see the BB dip slightly then climb :D


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Re: Short question topic

Unread postAuthor: wyz2285 » Sat Apr 13, 2019 3:27 pm

Considering the power output of homemade airsoft gun you should be getting considerable more range than before. Depending on BB weight 70m plus range should be well within your capabilities.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Re: Short question topic

Unread postAuthor: farcticox1 » Sat Apr 13, 2019 4:06 pm

That was only at 90psi, I have my eye on a 200psi compressor with 150psi constant output :lol:
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Re: Short question topic

Unread postAuthor: wyz2285 » Sat Apr 13, 2019 4:15 pm

90 psi is more than enough.
I got 650 fps with 75 psi with a QEV+3 way combo. 650mm barrel.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Sun Apr 14, 2019 5:36 am

wyz2285 wrote:Considering the power output of homemade airsoft gun you should be getting considerable more range than before. Depending on BB weight 70m plus range should be well within your capabilities.


Agreed, the point of hop-up is to compensate for low projectile density and velocity by providing lift. If you're not limited by safety considerations for skirmishing, pushing heavyweight (0.45g+) BBs at higher velocity should give you longer useful range regardless.

Tippmann actually use a curved barrel in their "flatline" modification to generate backspin in their paintball markers:

Image

I believe some early airsoft guns also used this system.

For "our" purposes however, I believe that using denser projectiles fired at higher velocities is a better path to longer range.

farcticox1 wrote:That was only at 90psi, I have my eye on a 200psi compressor with 150psi constant output :lol:


Image

Imagine what you could do with 30 times the pressure...

Image

Don't take GGDT as gospel at the extremes but a Mach 2+ 100 ft lbs+ air"soft" launcher is more than feasible with higher pressures...
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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