Hi: There was a recent incident when a passenger aircraft (maybe Canada) had to make an emergency landing because of a wrong metric - English conversion resulted in not enough fuel to get to the destination.
Are there metric equivalents to different series of English threads. For example I recently purchased a tap for 8-40 threads after mistakenly purchasing a 6-40 tap. Most good hardware stores in the US have 4-40 taps, dies, various lengths screws and nuts. Although 6-40 and 8-40 are standard sizes they are not commonly stocked. Are there a a number of alternative combinations of root diameter and pitch in the metric system? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Magnus Danielson wrote: >From: Hal Murray <[EMAIL PROTECTED]> >Subject: Re: [time-nuts] Standards for units >Date: Tue, 03 Apr 2007 17:14:50 -0700 >Message-ID: <[EMAIL PROTECTED]> > > > >>>The US has been metric since 1988, however the continued use of >>>customary units during the indefinitely long transition time is the >>>problem. Fundamentally it seems there is a lack of political will to >>>place a definite cutoff date on the use of customary units. >>> >>> >>I have friends who work in the auto industry. They reported (over 10 years >>ago?) that all new designs are metric. >> >>I wonder how much it would help if GSA gave a serious preference to things >>that were metric? >> >>What's 8.5x11 in metric? >> >> > >An odd-shaped A4ish paper for which there is no propper envelope. > >This fact I had to learn from an American professor that was enligthened when >he came to Sweden. Since then he converted to A4 even in his NYC flat where his >wife mostly lives (there is a downside to being professors at different >universities divided by the atlantic). > > > >>Do we have to convert to A4 too? >> >> > >Preferably. :) > > > >>For real fun, look at bicycle parts. I remember seeing one part that had >>25.4 threads per inch. >> >> > >:) > > > >>What fraction of the military is metric? Do they buy potatoes in kilos or >>pounds? >> >> > >The aviation side certainly have alot of imperial measures. Figures. > >Look at GPS. Certainly metric all the way as far as I have seen. Like all >aviation stuff that part may ofcourse use a mixture. Wonder what nice orbit >errors they would have if they used metric and survey inches as basis. >Hmm.... 2 ppm would be some 50 m or so. > > > >>>One would have thought that with the advent of computers using the >>>"survey inch" and related units for new surveys would have vanished by >>>now. >>> >>> >>There is probably a lot of legal baggage there. I'll bet they will be one of >>the last holdouts. >> >> > >I wonder just how many metric related laws they would have to write before >all things is metric. There is already a few to go around you know. > >Cheers, >Magnus > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
