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Caliburn: Mag-fed Pump-action Springer

Mag-Fed Pump-Action Springer Homemade

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#101 jwasko

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Posted 03 April 2017 - 07:31 PM

Since you're 3D printing anyway...Purple Catch?


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#102 CaptainSlug

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Posted 03 April 2017 - 08:00 PM

 

I was thinking about it over the weekend, I suspect you don't have enough spring load on the new sear.

 

Hearing that you don't, I started looking up airsoft sears. I don't think this is an airsoft sear (most were real-steel), but I don't think it's real-steel either (crossman IIRC, which should be pretty applicable actually).

I'll try this soon since I can modify the prints I have to try this. The first catch I had in the blaster worked, but didn't have enough leverage. This would allow me to add as much leverage as I want (within reason within the allowable space/travel).

 

Since you're 3D printing anyway...Purple Catch?

I modeled that into the design earlier today, but two ramped pieces sliding against each other makes for a crappy trigger feel. I have an ESLT catch thrown into the model at the moment, but in order to get the leverage needed to have the same moment angles and leverage as that design I'll have to use a cable to connect the trigger to the sear. It would make for a very very nice trigger feel at the expense of a little complexity.

 

The complications I'm running into all relate to having to do this with the catch way behind where the trigger needs to be.


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#103 laser

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Posted 04 April 2017 - 06:59 AM

couldnt you just move the handle, and by extension the trigger back? or do a longshot style pusher arm on the trigger?


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#104 CaptainSlug

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Posted 04 April 2017 - 10:32 AM

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rs3_29.jpg

rs3_30.jpg

 

Also, another video.

 


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#105 CaptainSlug

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Posted 10 April 2017 - 09:13 AM

SUCCESS. My first two molds cured fine. The mold on the left will allow me to cast Ramrod and Boltcores as a single urethane blank. I can try to do this with a center tool, or I can just drill them out on the lathe after casting them.

The mold on the right is for buttplates, which I will be castings out of a lower durometer rubber.

rs3_31.jpg

I have a 16lb tub of Smooth-Sil 95 that I can use to make more molds, and I have a plan moving forward to start producing blaster parts in bulk (two at once, among 5 molds). I'm making my own spincasting system which will allow me to make two to four whole blasters in a single weekend.

 

Now I'm just waiting on printed parts to show up so I can finalize the testing on the design.


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#106 Pineapplepies

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Posted 10 April 2017 - 06:55 PM

Do you think you could put a k14 in this? The power is great but what if we went higher fps, I know some homemade come in at like 230 fps like xellas in coops video so if you wanted to could you actually go the extra mile and use the strongest spring I know of.
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#107 CaptainSlug

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Posted 10 April 2017 - 07:05 PM

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No progress today. Didn't have time or opportunity at work to use the oven, which shares an outlet with a chiller that is tied to a vacuum weld chamber.

 

Do you think you could put a k14 in this?

No. You would have to make almost all of the blaster pats out of much higher grade materials. I'm not interested in entertaining springs that nobody can actually prime. Especially when this blaster already hits 210 fps.

 

Although, on a related note I did just find a casting epoxy that's 90% of the strength of polycarbonate when cured.


Edited by CaptainSlug, 11 April 2017 - 08:02 AM.

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#108 KaneTheMediocre

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Posted 11 April 2017 - 10:01 PM

I'll try this soon since I can modify the prints I have to try this. The first catch I had in the blaster worked, but didn't have enough leverage. This would allow me to add as much leverage as I want (within reason within the allowable space/travel).

 

I modeled that into the design earlier today, but two ramped pieces sliding against each other makes for a crappy trigger feel. I have an ESLT catch thrown into the model at the moment, but in order to get the leverage needed to have the same moment angles and leverage as that design I'll have to use a cable to connect the trigger to the sear. It would make for a very very nice trigger feel at the expense of a little complexity.

 

The complications I'm running into all relate to having to do this with the catch way behind where the trigger needs to be.

I've actually been hoping you would MACHINE a purple catch, and have much nicer sliding than what a 3d printed purple catch will usually do, and the full strength of whatever you cut it out of.  It doesn't make the most sense here in the sense that the point of the purple catch was to put everything into the handle for compactness, which isn't possible anyways because you have a relocated trigger.
 


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#109 Snoop Doggy doge

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Posted 12 April 2017 - 12:51 AM

No. You would have to make almost all of the blaster pats out of much higher grade materials. I'm not interested in entertaining springs that nobody can actually prime. Especially when this blaster already hits 210 fps.


speak for yourself, *flexes* My rainbow has more than a K14 and definitely is spammed. 
A better response would have been you are going to sacrifice the fire rate it gives you that makes it key, and considering most of this hobby can't effectively prime those springs, it isn't worth it. This blaster is supposed to be spammy, meaning get close. 210 FPS is not a joke, it's going to be a higher dart output.


However I would be a bit interested in a 30 kg+ springload Caliburn, would need a really long barrel though. 


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#110 CaptainSlug

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Posted 12 April 2017 - 07:10 AM

I've actually been hoping you would MACHINE a purple catch

I have not yet gotten around to making a design that would utilize one.

 

If you are really interested in a machined purple catch (and maybe a mold for duplicating it) maybe we could discuss that through PMs.

 

 

However I would be a bit interested in a 30 kg+ springload Caliburn, would need a really long barrel though.

It could probably be done, but would require that some of the parts be cast out of epoxy, or machined from thick sheets of polycarbonate. So obviously that would cost more.


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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?



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