Date: Mon, 4 Dec 1995 15:45:38 +0000 () From: Michael Smith <msmith@atrad.adelaide.edu.au> To: dgy@rtd.com (Don Yuniskis) Cc: msmith@atrad.adelaide.edu.au, freebsd-hackers@freefall.FreeBSD.org Subject: Re: No Thumbs??? (lack of concensus) Message-ID: <199512041545.PAA26637@genesis.atrad.adelaide.edu.au> In-Reply-To: <199512040435.VAA07145@seagull.rtd.com> from "Don Yuniskis" at Dec 3, 95 09:35:54 pm
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Don Yuniskis stands accused of saying: > > Powerup or tape start. > > Actually, I'd imagine it was highest during "spacing" operations. The tape > really flies, then. I'll have to do some more detailed measurements prior > to fully qualifying the tape for the application. But, it's a good ballpark > power estimate (I suspect *much* better than an Exabyte or QIC tape, etc.) Acceleration takes more power than maintaining a steady state, so it'll almost definitely be tape start. > > Bear in mind that the 1991 has _much_ more surface area than the 'cuda, so > > it can dissipate more power for the same dT. > > Granted. But I wonder if it really has 2.5 times the surface area... and, > if all that extra surface area is really *useful* for Pd. I guess if you > had $$$$ to "burn", you could really cook up a neat little experiment... 5.25FH is approx 150x80x200 = 116000mm^2 3.5HH is approx 100x40x140 = 47200mm^2 Casings on both are aluminium, so you can assume that the entire chamber will radiate _reasonably_ uniformly; I'd be inclined to expect similar dT on both. -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 041-122-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] "Who does BSD?" "We do Chucky, we do." [[
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