Huben Handpumping PCPs to 5.000 psi
- Thread starter Nomadic Pirate 66
- Start date
Not sure why mechanical advantages aren't built into any current hand pumps, similar to water pumps, maybe its the stroke length or the fact you need to stand over them to stabilize them. I certainly don't enjoy the current motions involved in a pcp hand pump! If my guns were all 2,000 psi~ than traditional hand pumps wouldn't bother me at my 140~ lb weight.
-Matt
-Matt
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It is built into them (pneumatically) - they are staged:
Also, there is no need for adding any more stuff to the basic design. Reducing the cross-sectional area of the piston(s) would make it easier to pump, and then you'd need proportionally more pump strokes to fill a fixed volume to the same pressure. People seem to optimize designs for short pumping times, by the looks of it, which is a reasonable approach.
It is all the same amount of overall energy that you have to put into it, for a fixed tank volume and final pressure, you only have a choice of how to spread that energy over time. It is easy to spread it with narrower pump pistons, and for a lower peak force, if you want to spend twice longer time pumping.
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I’ve tried hand pumping my k1 bullpup before and realized it takes too long. Especially if you wait for the pump to cool off instead of pumping it like a madman disregarding the heat building up inside. When I replaced my compressor and got a tank I did not attempt that again.
After getting the pistol I pulled out the Huben pump to try filling it from 200 bar to 300 bar. It only took around 40 strokes get there. Much more practical compared to hand pumping the bullpup.
Another thing to note is the cheap Chinese pumps I’ve owned took about the same effort as the huben pump. The huben hand pump is expensive because of the titanium tube and better build quality but for the price you can buy 7 cheap pumps.
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I've beaten the overheating and the wait for pump cool down by using several pumps at once.
this is what I do,
take -/+ 25 strokes then switch pump, and so on, that way pumps never get hot and there's no downtime waiting for cooldowns...at the moment I have 4 operational pumps if I want to.
this is what I do,
take -/+ 25 strokes then switch pump, and so on, that way pumps never get hot and there's no downtime waiting for cooldowns...at the moment I have 4 operational pumps if I want to.
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It would be cool to have a manifold that connects multiple pumps so you don’t have to degas, remove the hose, attach another hose for each pump.
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A station with multiple pumps that you just slide along jumping from pump to pump,...brilliant
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What I’d really like to see is a very lightweight/compact pump that could be easily carried in the field or taken out backpacking.
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Welp, you were right. Managed to get it from 160 to 305 bar. Didn't even take that long either ^^
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have pumped my daystate huntsman classic from zero to 220 bars once..after a rebuild..Hills Mk 3(still with me)
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any oidea where can one source the micron filter element of hills mk 3 pump..apart from hills themselves.i mean where its cheaper?
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I personally base pumping on the reservoir size. Amll bottles with the shoebox.
Tubular reservoirs with the pump.
With what I have owned of course. Evanix Benji and edgun pcps
Tubular reservoirs with the pump.
With what I have owned of course. Evanix Benji and edgun pcps
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