Recent content by PikeP

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    Unrelated to air gunning but has to do with FedEx poor delivery system

    Fed ex contracts their ground delivery, so consider that, its not really fed ex delivering your gold, but rather a contractor clothed in fed ex attire and driving one of their vehicles... Secondly, you should be able to contact your local fed ex office (the main distribution center) and pick it...
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    Considering another PCP

    My personal opinion is its redundant to own too many of the same caliber, unless you have more money than ya know what to do with and want to collect rifles just to collect rifles (and often times dust due to having too many guns to shoot) That said I would more drawn to a 30 cal or even .357...
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    What makes some PCPs so expensive?

    A 1500-2000$ pcp's regulator will likely (historically/statistically) creep just as much as a 500$ pcp's regulator. In some sense you get what you pay for but its far from linear in value imo. One manufacturer may have a 150% markup where another has 300% markup on parts/labor...really no...
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    I hate regulators

    Both regulated and unregulated have their places. Owning both within the same rifle, I find being regulated is far more capable for my needs than without. Someone else's needs may deem the unregulated version more capable. Simply put this is a very opinionated view, and you know what they say...
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    Where Is Our Hobby Headed?

    On one hand you have a very strong common ground that powder burners and air guns be kept separate (for legal reasons) On the other hand of the same beast, you have a majority of consumers and producers trying to close the gap to be nearly indistinguishable in performance between air guns...
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    Skout Skout / EPOCH / Who's "All In?”

    This will be a big money grabbing machine. Air heads get excited over anything new or fresh but in reality its all basically the same. Nothing ground breaking here that will force every other manufacturer to follow in their foot steps.
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    Regulator leak

    Have you tried removing it and replacing the O rings using the o rings in Captain O Ring avenger package? If not try Removing and replacing o rings once more. If you cannot solve a simple leak yourself I'd suggest sending the components to a competent gunsmith... hows that for help?
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    Tuning FX Impact Mk2/M3 - slower first shot - no reg creep - quasi-scientific analysis

    2.84 ID? x 2.62 CS Assuming so, 2.84mm / 3mm = 94.5%, which gives 5.5% stretch. 2.84+5.24*1.055 = 8.52mm when installed going into a 8mm bore? That sound right? Pretty standard fit. Glad its working for you. Maximum breakout friction occurs (supposedly) around 300 hrs, so if you get...
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    Tuning FX Impact Mk2/M3 - slower first shot - no reg creep - quasi-scientific analysis

    Have any idea how much squeeze the o-ring is under? Its installed OD and the bore OD?
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    Capacity of constant gas chamber

    Nervoustrigger summed things up fairly well, I will include a visual representation (graph) of plenum volume change and its effects. Each graph is for the same rifle (.25 cal marauder, 53 cc plenum, 19" barrel, .225" ports, 140 bar shooting 25.4 gr) all the changes in the one variable shown in...
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    Closing the valve before projectile leaves the barrel

    Because that is how the math generally works out with pneumatic air guns and efficiency with air, the difference in stroke (barrel length) and efficiency change proportionally. Ergo, there is a PEAK efficiency (2.5~ fpe/ci), where it doesn't matter HOW long the barrel is, you nip the valve...
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    Closing the valve before projectile leaves the barrel

    Any time you get over 1.0 fpe/ci you're doing around 50-60% of the barrel. 1.3~ fpe/ci is around 30% of the barrel. To calculate that use http://calc.sikes.us/1/ Although you need to make sure you stay above regulator pressure if regulated to keep that calculation accurate as it does not...
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    What airgun is only 31" long and is not a bullpup?

    31" oal as pictured 19" barrel 4.8lbs un-scoped 11 ounce trigger .25 cal doing 65 fpe while regulated at 140 bar
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    Tuning Plenum size formula/calculation ?

    Here is a simple graph with various plenum sizes ranging from 7 CC to 424 CC on my personal rifle (.25 cal with .225" ports) Another way to view it, if you can calculate pressure usage per shot in CC's, you can estimate how much pressure drop occurs in your plenum during your shot, so a...
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    It's time to define max distance to shoot.

    I'd say that depends on the kill zone of your target, shooting at something with a 3" brain/heart, or 1"? Huge difference between the two.. Killzone*.75 would be my personal opinion, to eliminate margin of error, can even go lower to killzone*.5 if its a windier day.