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Gallery, Projects and General => The Design Shop => Topic started by: NeoTech on December 12, 2012, 04:12:13 PM

Title: Making a HPA stirrpump.
Post by: NeoTech on December 12, 2012, 04:12:13 PM
So, well ever since i joined this forum i have struggled with making an airgun.

And one of the major parts of that is to make a HPA stirrpump (bicycle pump) that can produce 3000-4500psi.

And i have been tinkering with single stage pumps and can quite easily reach 1800-2000psi. Buts its not really enought get any performance at all out of anything.
So anyone got an idea for how a 3 stage stirrpump would work?! Why i want it in the stirrpump model is because of portability. =)
Title: Re: Making a HPA stirrpump.
Post by: Kinkajou on December 14, 2012, 08:44:40 PM
It would be interesting to dissasemble a Crosman Benjamin pump, but I understand that it will only reach about 3000psi. Maybe a Hill pump could serve this purpose better.
I found a exploded parts list for the Benjamin pump that could give an idea of how it is made. I got this from Crosman site.
Good luck
Title: Re: Making a HPA stirrpump.
Post by: NeoTech on December 15, 2012, 06:24:44 AM
yeah i have studied exploded parts diagrams from different manufacturers. But i cant really tell how the air travels through the pump. I need to get me one of those and take it apart i guess.
Title: Re: Making a HPA stirrpump.
Post by: Rob.Wilson on December 15, 2012, 05:34:12 PM
Hi Andreas
have a look at this http://www.shoeboxcompressor.com/   

Rob
Title: Re: Making a HPA stirrpump.
Post by: NeoTech on December 16, 2012, 10:40:42 AM
yeah that looks like a neat little device..  nothing you carry with you in the field though. but it gives you a hint of what its all about compressing into smaller and smaller diameter and so on. =)