https://spudfiles.com/spud_wiki/api.php?action=feedcontributions&feedformat=atom&user=193.105.210.174SpudFiles Wiki - User contributions [en]2026-04-24T19:22:44ZUser contributionsMediaWiki 1.44.3https://spudfiles.com/spud_wiki/index.php?title=Talk:BB_machine_gun&diff=4247Talk:BB machine gun2010-12-08T19:48:17Z<p>193.105.210.174: /* знакомства г нижний тагил */ new section</p>
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<div>6/2/08<br />
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'''Davidvaini''', nice job on adding the airsoft data, it looks good.<br />
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Could you add the barrel type and length and the air source pressure you used for the ROF and velocities you quoted? Are those numbers for a 120PSIG compressor or a CO2 setup? Perhaps a description of the ammo as well (6mm at 0.2g or 0.25g or ?). Is there a link you can add, perhaps to a post in the spudfiles forum, describing the particular gun?<br />
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I made some changes to the hop-up portion. Feel free to nuke what I changed. I was trying to bend the discussion more towards a hop-up increasing the accuracy, which in turn increases the ''effective range''. Instead of simply saying the hop-up increases the range. My understanding is that a hop-up actually decreases range somewhat, but the increased accuracy increases the ''effective range''.<br />
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I wonder if we should add a section comparing airsoft to copper/steel bbs? You really can't compare the performance based just on the muzzle velocity for the two ammos.<br />
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'''frontal areas:'''<br />
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6mm area=28mm^2<br />
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0.177" (4.5mm) area=16mm^2<br />
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'''masses:'''<br />
<br />
6mm airsoft = 0.2g or 0.25g or ...<br />
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0.177" copper/steel bb = 0.33g<br />
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'''sectional densities:'''<br />
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0.2g or 0.25g 6mm airsoft = 0.007g/mm^2 or 0.009g/mm^2<br />
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0.177" copper/steel bb = 0.02g/mm^2<br />
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So, at the same muzzle velocities the copper/steel BB will have a higher muzzle energy and should carry farther (smaller sectional density) than the airsoft.<br />
jimmy101<br />
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