> 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/
