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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.


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As you say, only the barrel length info:

August 12 2011 at 11:24 AM

dan house  (Login dan_house)
Crosman Forum Member
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Response to Yup. For another example, the 2240's 7" bbl gets 80% of the ME of the 2250's 14"...

at first blush.....about 71%

but, after I posted that, it occurs to me that there are other factors in play with changes in barrel lenght. shorter barrel means less friction or drag on the pellet...

And the whole pneumatic propulsion thing can, at time (har, most of the time) be counterintuitive, which is part of why I'm hedging/waffling on the 71%.

your 2240 example indicates a shortening of 50% only reduces MV by 20%. Definelty nonlinear and counterintutive.

Flashing back to some research you did as the ramp up to the AC efforts, are we back to most of the energy given to a pellet being developed _very_ early on in its travel trhu the barrel.

dr_subsonic's pneumatic research lab
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