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. More so, the BBC did not do as claimed, "present[ing] information for shock value, without putting it into perspective." Were they to have conducted the rest of the exercise and presented it in its entire perspective, the facts would have proven shockingly more in disfavor of air travel. That said, even the rudimentary "apples to apples" comparison above can't be deemed "virtually" accurate. Passenger mile fuel economy would be even lower on maximum range trips if the Boeing model with optional tanks were used, as it takes fuel to transport fuel. And, of course, it takes fuel to transport fuel to refueling stations on the ground as well. Including this type of cradle-to-grave energy variable would make the Jetta's passenger mile fuel economy less as well. Transportation fuel economy is best, first by rail, second by bus, third by fuel efficient sedan and fourth by air. Motocyclettas fit in there somewhere. But I'll let those with well paraffined slide rules calculate the "minutia" on this one. Todd Swearingen >hope everyone understands > >Thompson, Mark L. (PNB R&D) wrote: > > >>So again the BBC presents information for shock value, without putting >>it in perspective. >> >>Looking at a Boeing 777-200LR the fuel consumption is: >> Fuel consumption in 800 miles is about 24,000lb of fuel >> 300Lb/Fuel/Seat/3000 Miles. (Boeing spec) >> That is 10 miles/pound/seat of fuel >> Or 68 mile/gallon/seat. >> >> Compare that to your average car you don't even get close. >> >>Mark >> >> >>-----Original Message----- >>From: [EMAIL PROTECTED] >>[mailto:[EMAIL PROTECTED] On Behalf Of Chris lloyd >>Sent: Thursday, September 22, 2005 12:41 AM >>To: Biofuel@sustainablelists.org >>Subject: Re: [Biofuel] Dear Bob Allen was Re: There's no proof >>ofglobalwarming >> >> >>Just seen this on our BBC TV channel " every 800 miles travelled by a >>jumbo >>jet dumps 28 tons of CO2 into the atmosphere." Chris >> >> >>Wessex Ferret Club >>www.wessexferretclub.co.uk >> >> >> >>_______________________________________________ >>Biofuel mailing list >>Biofuel@sustainablelists.org >>http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.or >>g >> >>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/
