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Dag Evert's "American Classic"

As mentioned on the forum, heres a picture I took some time back, with natural winter daylight. A 2100, and a 1377, both guns have been recrowned, and had their trigger parts shimmed for play, contact surfaces stoned, and trigger springs somewhat reduced within safe limits. The 2100 has had its barrel shimmed with tape to remove play.
Both guns give great accuracy for the money if they are given good pellets!
The combination of pellets and guns in the picture represents something close to my boyhood dreams:-)


-- Dag Evert

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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
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