On Sun, Jun 26, 2011 at 4:48 AM, Ron Stone <[email protected]> wrote:
> many of us may still be wondering how might MPGe be represented in SI > (metric) terms. > > > On Sun, Jun 26, 2011 at 4:26 AM, John M. Steele < > [email protected]> wrote: > >> I must call foul, but I am unclear whether I am calling foul on: >> *EPA's methodology >> *Tesla's honesty >> *Andrew's investigative reporting and numeracy >> Quoting from the article, >> ## >> Now Tesla has raised the stakes again by introducing the Tesla Roadster >> 2.5 that boasts an MPGe rating of 112 MPGe on the highway and 124 MPGe in >> the city. This combined rating puts the overall MPGe for the Roadster 2.5 at >> 119 MPGe. >> >> When the new 2.5 Tesla Roadsters will become available is anyone's guess. >> However, with the original Roadster boasting an overall MPGe rating of 111 >> the improved 2.5 model is undoubtedly going to be a success. One interesting >> thing to point out is that other than the more efficient MPGe rating the >> rest of the Tesla Roadster 2.5 statistics *remain unchanged* from its >> predecessor; i.e. annual fuel costs, approximate range, and *kW-hrs per >> 100 miles*. >> >> ## >> >> >> >> 119 MPGe and 111 MPGe can not BOTH be represented by 30 kW·h/100 mi. >> Using a DoE data sheet (and some conversion) reformulated gasoline (would >> EPA use any other kind) is 119.87 MJ/gallon. Using this figure, I confirm >> that 111 MPGe is 30 kW·h/100 mi, but 119 MPGe is 28 kW·h/100 mi. Obviously >> the useful, meaningful expression of fuel economy for an electric vehicle is >> just some decoration the EPA makes them throw on the label. >> >> >> >> It is not simple reporting error. The labels have been previously >> reported with graphics. Only fake gallons are real! >> >> http://green.autoblog.com/2011/05/26/epa-rates-tesla-roadster-at-111-mpge/ >> >> >> http://news.consumerreports.org/cars/2011/05/extreme-epa-window-sticker-tesla-roadster-rated-111-mpge.html >> >> >> >> Pat and I challenge each other on conversion. I am going to offer a new >> defense of conversion: >> >> "He who can't convert in a 'dual' society gets hoodwinked." >> >> I agree with Pat that we need to get past conversion and truly metricate, >> but we have a Congress that currently guarentees that can't happen because >> they will pass (and demonstrably have passed) laws to prevent it. I blame >> Congress, not centimeters. >> ------------------------------ >> *From:* Pat Naughtin <[email protected]> >> *To:* U.S. Metric Association <[email protected]> >> *Sent:* Sat, June 25, 2011 11:39:40 PM >> *Subject:* [USMA:50743] MPGe = miles per gallon equivalent? >> >> Dear All, >> >> You will be interested in this reference from Reuters: >> http://www.reuters.com/article/2011/06/24/idUS27637249720110624 where >> they write: >> >> So, the EPA had to come up with a new unit of measurement in order to >> help the public understand all those crazy and complicated numbers. >> Essentially, the EPA had to dumb stuff down so people could understand what >> they were talking about- if the EPA has to make up a new system of >> measurement to replace an existing system of measurement that is deemed to >> tricky by the masses,* I guess this sort of puts the final nail in the >> coffin for the metric system ever being adopted in the U.S.* >> I emphasised the last sentence of the quote. Better still, I will repeat >> it here: >> >> *I guess this sort of puts the final nail in the coffin for the metric >> system ever being adopted in the U.S.* >> >> Cheers, >> >> Pat Naughtin LCAMS >> Author of the ebook, *Metrication Leaders Guide,* see >> http://metricationmatters.com/MetricationLeadersGuideInfo.html >> Hear Pat speak at: http://www.youtube.com/watch?v=_lshRAPvPZY >> PO Box 305 Belmont 3216, >> Geelong, Australia >> Phone: 61 3 5241 2008 >> >> Metric system consultant, writer, and speaker, Pat Naughtin, has helped >> thousands of people and hundreds of companies upgrade to the modern metric >> system smoothly, quickly, and so economically that they now save thousands >> each year when buying, processing, or selling for their businesses. Pat >> provides services and resources for many different trades, crafts, and >> professions for commercial, industrial and government metrication leaders in >> Asia, Europe, and in the USA. Pat's clients include the Australian >> Government, Google, NASA, NIST, and the metric associations of Canada, the >> UK, and the USA. See http://www.metricationmatters.com/ to subscribe. >> >> > > > -- > > ----------------- > Ron Stone > ---------------------------- > on Twitter (at) photonron > --------------------------------------------------------- > disclaimers or other restrictions may apply to this message. > > -------------------------------------------------------------------------------------------- > > > -- ----------------- Ron Stone ---------------------------- on Twitter (at) photonron --------------------------------------------------------- disclaimers or other restrictions may apply to this message. --------------------------------------------------------------------------------------------
