Boosted Flying Dragon HPA pump

[MartyB]

Well, if someone else has done it, they haven't posted about it.

I broke down and boosted my Flying Dragon pump.
Not as simple as the Benji pump, since the intake on this is through the handle.

Drilled and tapped 1/8 NPT brass nipple into the handle.  Elbow down, 1/8-1/4 npt adapter to the air dryer (Northern Tool purchase).  I use a lightweight super flexible poly air hose and don't even notice it.

Plugged the ends of the handle with 1/2" copper pipe caps.  Drove them into the ends, slightly recessed.  And then sealed them in with thin CA glue.
Running 22 PSI, I'm not too worried about anything blasting out.  #005 o-ring on the top of each bolt for the handle  And right now, just some black tape pinched between the handle and the pump acting as a seal there.  Need to get some better seal material.

At most 1/2 as many strokes for whatever I'm doing.  The key is to pause at the top of the stroke.  Let the boosted feed finish pressurizing the 1st stage.

[caniborrowsomeammo]

Genius!!!!
I was going to go through one end of the handle. Your design is very clean.

[MartyB]

Genius!!!!
I was going to go through one end of the handle. Your design is very clean.

I made several trips to the hardware store with the bare handle trying to figure out the fittings to do just that.  Always came out with just the handle since I could never find anything that I liked well enough.

I was into my tap and die set for a different project and noticed it had a 1/8 npt tap.  BINGO!

Still working to seal the handle to the pump.  It leaked so bad initially that boosting did almost nothing.