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speedometer replacement - Printable Version +- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com) +-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61) +--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63) +--- Thread: speedometer replacement (/showthread.php?tid=9478) Pages: 1 2 |
speedometer replacement - Ralph L. Fullenwider - 08-27-2011 17:03 Don Your right there was an error on my part, it is called a typo, my bad. My math is for my tires which are 502 RPM not the 501 that I put into the first post, thank you for catching that and your right it does affect 5 of the 6 digits, I am fortunate that I got the right answer in the first place for my application. I guess I may have to sharpen my calculator with SO many digits, I ran out of room using fingers and toes. This ends my participation to this thread and will not make any further posts because heaven forbid I might make a mistake being human. Ever make a mistake? Yep, happened to me once. Safe travels, Ralph and Charolette Fullenwider "84FC35 "Ruff Diamond" Duncan, Oklahoma At 09:18 PM 8/27/2011 -0700, you wrote: >I always try to simplify formulas where possible. I suspect it was the >sheer number of decimals used that lead to your making the math error in >that top line - when you make an error that affects 5 of the 6 digits you >are fortunate that rounding got you to the right answer. > >The teleflex document is of necessity a complex one, because of the many >different speedometers involved. It just happens that OUR 85MPH >speedometer is the one where the .0236 and 23.61 can be cancelled into a >simple 1/1000. > >Thanks for the info on the pickup - I had thought that it might be coming >from the DDEC on mine; internally my DDEC II stopped recording miles (but >still has MPH) a few years ago. > >Don Bradner >90 PT40 "Blue Thunder" >My location: http://www.bbirdmaps.com/user2.cfm?user=1 > >On 8/27/2011 at 10:17 PM Ralph L. Fullenwider wrote: > > >Don: > > > >The last magnetic pick up or Proximity switch, same thing, that I replaced > >was on a '95 Bird, so I know it was there up to that year model and I do > >not know about further years. > > > >Another thing that I know, the math that I reported on to set the simple > >binary switches up for the divide number and the Hertz rate worked. So why > >confuse with mumbo jumbo of equation changes from a known good formula > >written for the Teleflex gauge. My install and use of the programming from > >the web site I published to anyone needing it, worked very well without > >your change. > > > >Safe travels, > > > >Ralph and Charolette Fullenwider > >"84FC35 "Ruff Diamond" > >Duncan, Oklahoma > > > >At 04:21 PM 8/27/2011 -0700, you wrote: > >>Do all Birds use wheel mounted vs transmission mounted generators? > >> > >>Note that there is a math error in the top line below, but it does not > >>affect the rounded end result. > >> > >>However, multiplying by 0.0236 and dividing by 23.61 is funtionally the > >>same as dividing by 1000, so > >>501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using > >>.0236 and 23.61 would give. > >> > >>On 8/27/2011 at 4:39 AM Ralph wrote: > >> > >> >501 x 60 x 0.0236 = 710.832 > >> >This number is the HZ rate > >> > > >> >Now we take the HZ rate number and divide it by 23.61, which is the > >> >constant for the divide number and will give the binary number that is > >set > >> >up on the program switches in the unit. > >> > >> > |