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Scot Laughlin's Custom All Weather 2260

2260 with short crosman receiver atop a mini riser made from aluminum tube. Barrel is a 2200 soda straw
tensioned inside a titanium golf club shaft. Three screw mod to the trigger, bulk co2, SSP 250 rear cocking
striker assembly. Factory stock, reshaped, bedliner finish and stick on cheek piece. The idea was a weather
resistant light hunter for rainy days.
I've got a Cothran stainless receiver and gas tube waiting for me to get back to this one.

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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
from IP address 153.90.162.47


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
[linked image]
the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic

 
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