Huben Charging GK1 with Hand Pump

[Jeekay29]

Forgive me if the following newbie questions have already been asked and answered:

Approximately how many pumps from a quality hand pump will it take to bring the GK1’s 85cc cylinder from 0 to 4500 psi?

And about how many pumps to top it off from about 2000 psi to 4500?

Thanks folks!

 

[Stubbers]

2...
Many.

Depends on the hand pump, not all are the same, and some may be more efficient than others so it won't be a one size fits all here depending on each pumps seal conditions and the volumes between each stage. Maybe some will chime in with empirical data but I'll throw out an estimate.

200-250~ from empty
100~ from 2,000 psi

-Matt

 

[MikeVV]

Yeah, I use a hand pump in filling all of my PCP pistols.

How many pumps, like was said above..."many" ! It really doesn't matter does it ? When you get to your desired pressure...you stop pumping, simple as that.

Mike

 

[Felinis]

Yeah, I use a hand pump in filling all of my PCP pistols.

How many pumps, like was said above..."many" ! It really doesn't matter does it ? When you get to your desired pressure...you stop pumping, simple as that.

Mike

Until you buy a hand pump and discover that the number of pumps to achieve your desired pressure is too many.

Reminds me of the guy here who balked when he was told that a modded Crosman 1322 would require twenty pumps per shot.

 

[Nomadic Pirate 66]

If you target shoot and you de-tune your gun to the lower- mid teens FPE you can probably get close to one shot per 2 pumps,

if you hunt and run your pistol hot you aren't gonna do a lot of shooting but for zero, check zero and shoot critters at that point pumping is super minor

 

[weevil]

First, it should come with some air and you should not try to go from zero with a hand pump because a jolt of air from a tank is sometimes needed to get things sealed and to reset the magazine rotation. The rest is what it is, as others have said. Going beyond 3000psi with my (Hill) hand pump is a workout.

 

[beerthief]

If you are serious about hand pumping : 1) it is a small reservoir 2) you only have to pump from 0 psi one time , 3) you do not have to shoot down to 2000 , you can top off any time .
Still hand pumping above 3000 is a workout . But if that is what it takes for what you want .............

 

[Nomadic Pirate 66]

I am ready,

pumps are ready,

....not a worry in the world

 

[Jeekay29]

Hahahaha… Are the multiple pumps a strategy for not over-stressing a single pump?

 

[beerthief]

pump till one get hot , then switch pumps ?

 

[weevil]

pump till one get hot , then switch pumps ?

I was imagining the use of two pistols in each hand.

 

[Nomadic Pirate 66]

Hahahaha… Are the multiple pumps a strategy for not over-stressing a single pump?

Exactly, that was my technique back in the day when I was shooting/testing a lot,.....rotate pumps, 25 or so strokes then switch that way they never get warm so less stress and you don't need to take breaks....just keep on pumping

 

[Jeekay29]

As a newly-minted retiree, I plan to do a lot more shooting, and am especially excited about transitioning from firearms to HPA guns.

I get my cardio in with brisk walks and stair-taking, both of which I enjoy. But since I’m lazy about upper body exercise, I’m thinking that air pumping sessions might motivate me to pump up my saggy “guns.”

 

[beerthief]

I was imagining the use of two pistols in each hand.

maybe gang all 4 handles together and attach to a windmill or water wheel ?

 

[willy]

Well if ya over 70 i would think one day to pump and and the next day rest the next day shoot"

 

[Nomadic Pirate 66]

As a newly-minted retiree, I plan to do a lot more shooting, and am especially excited about transitioning from firearms to HPA guns.

I get my cardio in with brisk walks and stair-taking, both of which I enjoy. But since I’m lazy about upper body exercise, I’m thinking that air pumping sessions might motivate me to pump up my saggy “guns.”

Great thinking there,....good exercise and fill guns in the same time, win, win

 

[bluemoon_wulf]

Well if ya over 70 i would think one day to pump and and the next day rest the next day shoot"

yeah. i am not 70. but after handpumping i am not in tiptop shape to shoot. to control breathing and heartrate definitely my out of shape body needs a break before attempting accurate aiming.

 

[Nomadic Pirate 66]

yeah. i am not 70. but after handpumping i am not in tiptop shape to shoot. to control breathing and heartrate definitely my out of shape body needs a break before attempting accurate aiming.

Key is.....to get in shape

 

[BackStop]

Key is.....to get in shape

I am only 63 and until recently, hand pumping was the only thing I did for the airguns I use.

However, my health has taken a turn for the worse, so, although I never even considered buying a compressor, I did buy a GX-cs4.

Considering I have no tanks or even high volume bottled airguns, I guess it is over-kill and the fact that my health is declining relatively fast, I guess longevity of the pump may not be an issue.

And I haven't even shot enough to use the pump for filling my guns except for once each from ~2500-3000psi...

I have to admit that it was nice to not be out of breath and exhausted by hand pumping. And NP66, you should know I have been an advocate of hand pumping for a long time. I think I can still do it, but a lifetime of smoking, drinking and treating my body like a toilet has caught up with me.

All my best!

Kerry

p.s.

Don't Smoke or Vape!

 

[Stubbers]

p.s.

Don't Smoke or Vape!

+1

I don't drink, and I quit smoking cigarettes 8 years ago. quit vaping 2 years ago, and quit marijuana 38 days ago.

To add to that, it's not about GETTING IN shape (easier said than done once out of shape) it is about STAYING IN shape. Sedentary lifestyle is awful for ones body.

So if you're already in shape, hand pumping is a relatively easy task, where as if you're out of it, simply saying to get back into shape is...easier said than done.


-Matt