Okay, in this case I take your point that with average occupancy rate the jetta is more efficient. But it is also roughtly twice the mpg as the average car in the US. So, I still think that 30 PMPG is more realistic an average for car travel.... about the same as the efficient airplane.
On 9/22/05, Appal Energy <[EMAIL PROTECTED]> wrote: > > I think it's actually more accurate to compare > > each vehical in it's most commonly filled state. > > Perhaps, to achieve "real world" passenger mile fuel economy averages, > presuming an average occupancy rate per vehicle could be achieved. No doubt > someone has done that somewhere. At least you can bank on the fact that the > airlines have. > > Still, even if 50% occupancy was considered the average, that particular > airliner would only net a 31-34 PMPG, whereas the Jetta would net 100 PMPG. > Seventy percent occupancy versus thirty-three percent? That would be > approximately 43-47 PMPG vs 66 PMPG for the Jetta. > > Almost no matter how you slice it, air transportation at the industrial scale > remains the least fuel efficient method. > > Todd Swearingen > > > >I think it's actually more accurate to compare each vehical in it's > >most commonly filled state. At least the airplane usually has more > >than one person in it... whereas most the cars I see here have one > >person in them most of the time. All the people who I see driving to > >work each morning, alone, in their suburbans, are getting about 14 > >PMPG..... woo hoo. I figure I get about 210 PMPG when I take the > >bus. > > > >On 9/22/05, Appal Energy <[EMAIL PROTECTED]> wrote: > > > > > >>Mark, > >> > >>Your conclusion below is inaccurate. > >> > >>It compares a fully loaded vehicle (airliner) and the extrapolated fuel > >>economy per passenger to the fuel economy of a car with but one passenger. > >> > >>Apples to apples, both vehicles need to be fully loaded when compared. > >> > >>A fully loaded, 301 seat, Boeing 777-200LR nets an equivalent fuel > >>economy of approximately 68 passenger miles per gallon (PMPG not MPG). > >>(62.6 PMPG using http://www.flug-revue.rotor.com/FRTypen/FR77720L.htm , > >>premised upon standard tanks and a specific gravity of 0.81 for Jet A fuel.) > >> > >>In comparison, a fully loaded, 4 seat,Volkswagen Jetta or Golf, nets an > >>equivalent fuel economy of approximately 200 PMPG. > >> > >> > >> > > > >_______________________________________________ > >Biofuel mailing list > >Biofuel@sustainablelists.org > >http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > > >Biofuel at Journey to Forever: > >http://journeytoforever.org/biofuel.html > > > >Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): > >http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > > > > > > > > > > _______________________________________________ > Biofuel mailing list > Biofuel@sustainablelists.org > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
