Okay, after a bit of time, and bit of money, i got myself a backpack worthy pump made up, it is more an assembling of various store bought parts, expect for the aluminum fitting i had machined up.
-I was able to land the pump assembly from the FX Indy from FX USA ($350, just for that part).
-Air Venturie high pressure gauge $15, Hill pressure relief screw $15 from Pyrmayd Air
-The hose and the adaptor fitting is off my MK2 Hill hand pump. I replaced the hose on my Hill pump with the micro bore hose from pyramyd, $30 for the replacement hose.
-And lastly, a local machine shop made up the aluminum fitting to piece them all together. Waiting to hear back on what a production price would be for that, working up the prototype ended up being $200 (ouch).
the Good: a hand pump i can use with the gun slung or holstered, no more setting the gun down on a pad or in the dirt. Lighter, i have not gotten to put the pumps on a scale to see what the weight difference is, but by feel it's quite a bit. Easy to stash into a backpack due to its shape, and more compact.
the Bad(ish): While pumping standing up is a nice change from the bike pump style, if you are filling any tank of volume its going to get tiring due to the long throw of the handle. Works great for the Marauder pistol to 3000psi, or filling my AP16 to 200bar, anything over that and the pump starts binding up (not the right word) but i believe the pump actually compresses air on both the up stroke and down stroke of the handle and when your tank pressure gets higher it becomes more difficult to work the handle. Cost, i assume now that the first fitting is figured the cost of additionals would be less, not sure by how much though.
When pumping you don't close the handle all the way, it compresses the air at the partially open stage (pictured where i am holding it), the most that happens at times is i bump my knuckles a little, but you don't have to worry about biting your hands. You can also lay it down flat and work it on a table, but that would be better if it had a flat plate to stabilize it from rocking around.
Conclusions: i will keep my Hill pump for target shooting (i don't use scuba bottles or compressors), but for anything where i plan on going out for some time i will definitely be taking this. To really be ideal it needs to have a shorter throw on the handle. So it's close but not quiet there, but its plenty good for now.
-I was able to land the pump assembly from the FX Indy from FX USA ($350, just for that part).
-Air Venturie high pressure gauge $15, Hill pressure relief screw $15 from Pyrmayd Air
-The hose and the adaptor fitting is off my MK2 Hill hand pump. I replaced the hose on my Hill pump with the micro bore hose from pyramyd, $30 for the replacement hose.
-And lastly, a local machine shop made up the aluminum fitting to piece them all together. Waiting to hear back on what a production price would be for that, working up the prototype ended up being $200 (ouch).
the Good: a hand pump i can use with the gun slung or holstered, no more setting the gun down on a pad or in the dirt. Lighter, i have not gotten to put the pumps on a scale to see what the weight difference is, but by feel it's quite a bit. Easy to stash into a backpack due to its shape, and more compact.
the Bad(ish): While pumping standing up is a nice change from the bike pump style, if you are filling any tank of volume its going to get tiring due to the long throw of the handle. Works great for the Marauder pistol to 3000psi, or filling my AP16 to 200bar, anything over that and the pump starts binding up (not the right word) but i believe the pump actually compresses air on both the up stroke and down stroke of the handle and when your tank pressure gets higher it becomes more difficult to work the handle. Cost, i assume now that the first fitting is figured the cost of additionals would be less, not sure by how much though.
When pumping you don't close the handle all the way, it compresses the air at the partially open stage (pictured where i am holding it), the most that happens at times is i bump my knuckles a little, but you don't have to worry about biting your hands. You can also lay it down flat and work it on a table, but that would be better if it had a flat plate to stabilize it from rocking around.
Conclusions: i will keep my Hill pump for target shooting (i don't use scuba bottles or compressors), but for anything where i plan on going out for some time i will definitely be taking this. To really be ideal it needs to have a shorter throw on the handle. So it's close but not quiet there, but its plenty good for now.
