How many FPS and...

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Postby arsondevine » Sat Aug 16, 2003 8:42 pm

I want to know how many fps I am getting according to HALS but my computer is acting up...

My Gun is, 6" x 3" with a 1" sprinkler valve going to a 1.5" barrel that is 26" long, Shooting Golfballs which I think are 46g?

Oh and its shooting at 100 psi everytime.

All those sizes seem good? I shot a golf ball straight up and lost site of it and it took forever to come down "was a scary moment hehe"

R'
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Postby BIGGUN » Sun Aug 17, 2003 1:18 am

How are you shooting golfballs out of a 1.5" barrel?

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Postby Namor » Sun Aug 17, 2003 6:46 am

<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by BIGGUN
[br]How are you shooting golfballs out of a 1.5" barrel?

BIGGUN
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
he has sdr21?
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Postby pacogoatboy » Sun Aug 17, 2003 7:35 am

you can shoot a golfball out of a 1.5" gun and it will go far. it just won't go as far as it could. usually when people build pneumatics, they go for bigger chambers and longer barrels. i guess if you were specifically aiming to build a mini, then everything is fine. it ought to work nicely still though, and be very quick to charge.
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Postby arsondevine » Sun Aug 17, 2003 1:04 pm

Yes it is sdr-21

Well it was made to be quick charged off a c02 adapter to 100 psi.

No1 knows how to use Hals's GGDT? arg!

R'
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Postby mta » Sun Aug 17, 2003 1:53 pm

Running your gun through GGDT, assuming a Cv of a 6.3, 10ms open/close time, 1.7" bore, 26" barrel, 44 cu. in. chamber, 46 gram projectile, 1 psi friction equiv.. gives 251 fps at 100 psi.
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