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Carl Quick's LiteWieght 2240

So for about the last 24 months, I've had her on a serious diet. Now I am happy to report that she lost nearly 13 ounces and is feeling so much better. And let me say one thing, when I pick her up with one hand now she is light as a feather. Well, almost a feather.

Things I have done so far:

OEM main tube was lightened by me.
Barrel is OEM and trimmed down by me.
Main tube plug is made of Delrin by me.
Gas cap is aluminum, comes from HPA and bored out by me.
Hammer is made from Delrin by me with a modified 1701P striker.
Valve is an aluminum Disco rear end with a brass Pro-Top by Anthony.
Trigger grip frame is aluminum by Bluefork Design and then hogged out by Gregg.
Front barrel band is aluminum, made by Anthony, drilled by Rich and milled by me.

Quickster47



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Final setting

June 27 2012 at 7:58 PM
robert  (Login gubb33ps)
Crosman Forum Member
from IP address 68.105.50.68


Response to Transfer port restrictions

OK...with a goal of 12 foot pounds and a tiny air volume of an estimated 44ccs, kept playing with the transfer port. Striker hit was running the carbine at 160-110BAR (or about 2350 to 1600psi.

Changed the tension UP a little bit (one pre
tension turn of the screw), swapped for a striker that was 10gr. Lighter, and changed the transfer port to .072 ( 5/64ths).
[IMGhttp://i157.photobucket.com/albums/t50/ribbonstone/Hip Ac/DSCF1899.jpg[/IMG]

14.3gr. Benjamin Cylindrical

581
597
601

606
613
620
623
628
628
625
624
618
614
606
608
607
610

596
597
579

Which works out to:
25 feet per second = 628 603= 14 shots

So... 2350-1600 fps...44cc....20 shots...601fps average...call it a BAR/CC-FPE of about 10.

Just saying.

Is not a great long shot count, but it has a dinky air volume.
Efficiency of 10 is pretty good for a 12 foot pound gun (OK..call it 11.5 to 12.5 gun).

Suggestions:

1. Restrictive transferor port is USELESS if looking for maximum velocity.
2. The increase in shot count with a strangled down transfer port is VERY CLOSE to the same energy x shot count of a wide open transfer port...it just doles out the energy over a long time frame.



 
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