One other thing to think about, how many different tools are you going to
be using? The reason I mention that is that each time you unplug and
replug a tool into a line, you lose quite a bit of air.
You can counter this by having extra arms for each tool, but that takes
alot more air to fill in the beginning.
Just something to think about.
Inch
http://megageek.com
"Did you exchange, a walk-on part in the war, for a lead role in a cage?"
R Waters.
"Keith Kaplan" <keithka@microsoft.com>
Sent by: shop-talk-owner@autox.team.net
08/30/2002 16:24
Please respond to "Keith Kaplan"
To: <shop-talk@autox.team.net>
cc:
Subject: RE: compressors at the track
If it's a _really_ big race, there's often someone at the track who can
refill/replace the bottle, so running out is no big deal.
I also think the 3 hour run time requirement is high -- at a leisurely
10 seconds to run a fastener in and out (5 seconds each way) you could
dismantle 1080 fasteners (180 minutes * 6 fasteners per minute) in that
much time. Including head studs and main caps (assuming you run those
in with an impact wrench <g>) there aren't 1080 threaded fasteners on
most racecars. IOW, a normal size nitrogen bottle really will last a
long time.
And if you do go the nitrogen route, make sure you have some kind of
regulator/valve protector in case you ever knock the bottle over by
pulling the air hose too far, or else lash the bottle to something
sturdy.
-----Original Message-----
> For instance, let's say I go to nationals and manage to break
> something reasonably major at the Pro... Will a nitrogen bottle run
> air impacts & ratchets & blow guns for say 3 hours of usage (obviously
> the 3 hours would be spread out over a few days...)?
Hmmm, typical impact uses maybe 4 cfm @ 7 atmospheres (90 psi gage), so
3 hours would be 3*60*4*7 = 5040 scf. A little web surfing turns up
that a common "type 49" nitrogen cylinder contains 304 scf. Even
ignoring the "tare" gas left in the cylinder when it's pressure drops to
90psi, you're sure going to need a lot of them ...
Randall
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