So, what is the fuel economy of the average airplanes, instead of the efficient ones? I have no idea how different airplanes compare.
Speaking of emissions, what about using biodiesel in airplane engines. I know that quite a few people are excited about the new compression ignition airplane engines that can burn jet fuel instead of aviation gas, because it opens up the possibility of using biodiesel for small airplanes. So this implies that jet fuel and biodiesel are somewhat similar????? I would think that the gell point of biodiesel would be a big problem at 30,000 feet though..... On 9/22/05, Appal Energy <[EMAIL PROTECTED]> wrote: > Not yet Zeke. > > If the airline wants to tout it's highest fuel economy vehicle, so can > the ground transportation sector. > > Using you're method you'd be giving an unfair leg up to the airline by > accepting their high fuel efficiency model but handicapping ground > transport by introducing an "average" efficiency value. Best to best. > Average to average. Worst to worst. > > At least they're getting off the hook by not being scrutinized under an > emissions regimen (which is actually where this thread started, come to > think of it), where the Jetta would would cash in nicely with B-100 as > nearly carbon neutral, compared to their 100% carbon negative. > > Todd Swearingen > > Zeke Yewdall wrote: > > >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/ > > > > > > > > > > > > > > _______________________________________________ > 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/
