Agreed Ross. One standard atmosphere equals 14.73psi or 29.92 " Hg or 1013.2mB (HPa) or 101.56kPa and gauges can be calibrated to any of these.....aircraft generally use "Hg but try to explain the difference to some ignorant young salesman when you're chasing such a gauge. I encounter this problem with electronic salesmen, AN bolt size versus wire gauge etc etc, weber jets, ...I could go on and on.... it's very exasperating knowing everything about everything ...sic...:-) Ever tried to explain to a pilot why an aircraft cannot stall at 0G!!!
John The Martindale Family 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA phone: 61 2 66584767 email: johnj...@chc.net.au ----- Original Message ----- From: "Ross Youngblood" <ross...@operamail.com> To: "KRnet" <kr...@mylist.net> Sent: Tuesday, February 10, 2004 8:04 PM Subject: Re: KR>Vacuum gauge vs manifold pressure gauge > I'm thinking that vacuum gauges are calibrated in inches of mercury, > and pressure gauges are in PSI, which are two different things. > > But the principal is similar I think. > > On Mon, 9 Feb 2004 19:53:10 +1100, Martindale Family <johnj...@chc.net.au> > wrote: > > > OK folks this might be the dummest question but... > > > > Is a vacuum gauge going from 30" of vacuum down to 0" the same as a > > manifold pressure gauge going from 0" of pressure up to 30". If so, and > > it's just a dial face change, why are the latter so much more expensive. > > See, for example, in the Aircraft Spruce catalog (mine is old at > > 1998-1999): > > > > Mitchell vacuum gauge PN 10-25125 for $35-50 and manifold gauge PN > > 10-25145 for $71-50. > > > > Why couldn't I just remove the dial face and mirror image it? Does > > anyone know of a supplier of 2 1/4" manifold gauges that are cheaper. > > Egauges have an ISSPRO but it's calibrated in psi and I don't like its > > look. VDO don't seem to make a MP but do have a vacuum and this might be > > what I get since it matches my other gauges. > > > > Awaiting the dunce's hat in the corner!! > > > > John > > > > The Martindale Family > > 29 Jane Circuit > > TOORMINA NSW 2452 > > AUSTRALIA > > > > phone: 61 2 66584767 > > email: johnj...@chc.net.au_______________________________________ > > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > > please see other KRnet info at http://www.krnet.org/info.html > > > > -- > Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
