A new model I Dragon Fly to test?

[Nvreloader]

SB
Like wet rubber noodles in the shoulders/neck, no problems with the arms.
I am having fun ?? I think....

I am waiting for some more reamers, and a hunk of Oak wood to fit the pump arm,
I am stealing/adding Back Roads pump handle Idea, "Thanks, Back Roads",
which will work very well around here, as I am always resting the forearm on
rocks/sage brush for shooting, will save the OEM forearm from lots of abuse...

Also making a long 6" piece scope base to dovetail/fit on/between the rear sight
and front section of the action, along with a 3" section the rear section,
all Dovetailed and screw attached. Then I'll have approximately 9" to mount my
normal variable scopes, as I can't see Irons any more, old tired eyes.

Note: There is a difference between the DF 1 and 2 rear sight action/spacing,
the DF 2 is shorter distance than the DF1, by 1" approximately, in the rear sight
spacing/distance, as I found out.

And I have a WILD HAIR that growing and needs scratching, this DF 1 or 2 will
become a 20/5mm caliber, or a 177 cal, or 25 cal, as I don't have any in those
calibers that are pumpers.. Yet, Except for the 4 Dan's.
More later,
Tia

[splitbeing]

A DF 20!?!  Now that is a novel idea!

[Psipumper]

I just got mine reassembled. The chronograph says 784 on 8 pumps.

[Nvreloader]

Holy Snack Bar PSI,
What are you running in that beast, Nitro??...lol
That's better than the DF 2 results,

By any chance did you record any spec's/air passage ways holes on that valve?,
it's got to be different valve than the DF 1/2 valves, and or pump head setup..

I know you do have a longer bbl, which helps.
What caliber .177?
Tia,
Don

[Psipumper]

Nvreloader, it is.22 . 14.3 CPHP
I will check it tomorrow and list the numbers for 1 to 10 pumps.
Transfer port is .167” throughout.

I enlarged the throat hole to .196”
The stock hole is too small so this is a bottleneck to support larger transfer ports .
So I did basically the same thing the other guy did that I posted about on page 3 and a little more.
I did install a nice oil wiper on the pump head and got rid of the rubber donut.
The  pump and valve are the same as the dragonfly .

[Psipumper]

I have the numbers for 1 to 10 pumps:
1  277
2  433
3  521
4  588
5  651
6  702
7  746
8  784
9  821
10 825  (21.6 fpe)

Not sure why it only gained 4 fps on the 10 pumps? I think I counted right. Did not have any retained air.
Pretty happy with it like it is for power. I don’t want to stress or damage it from over pumping.

[Nvreloader]

PSI 
Very nice, 

Jerkin the rug out from under me Huh...lol

Well, I'll be following along behind you, 
I have my doubts about this DF 1, we'll see.....
Thanks,
Don

[Nvreloader]

Guys
Results from "G" test,
I am going backwards, and I know this short bbl is NOT helping. 

Summary of test results/ changes made during tests,
Barrel = 21.750" long: 14.3 gr Crosman pellets used in all tests,
Changes made for each test, under the FPS section.
Pumps
"A" test   "B"     "C"    "D"   "E"    "F"     "G"
1. 293--No Air--291--262--269---265--237
2. 396 --282----367---379--374--374--357
3. 446 --341----433---439--443--443--417
4. 475 --433----479---488--492--485--469
5. 511 --449----521---524--531--516--500
6. 531 --492----551---554--557--547--535
7. 541 --598----574---580--587--570--574
8. 561 --557----593---593--600--593--584
9. 567 --561----606---613--620--616--612
10. 561--531---616---629--643--636--619
11..-------587---629---643--656--652--622
12..-------590---643---646--666--669--630
No retained air left after any shot.

"G" Test=
Reamed valve throat to .191" from .170",
reamed valve exhaust exit hole to .160" from .136",
removed valve filter, valve intake hole reamed to .076",
with a long nose to fit intake hole of .076" x .200" long,
fills the intake hole from tapered end of the inside tapered valve,
has a .185" long poppet shaft at the rear of the valve,
used OEM valve spring @ 5.5#'s.
Used 11# Flat wire hammer spring.

I am checking to see if I have any leaking...

Thoughts and or suggestions...
Tia