Hawaiian717 From United States of America, joined May 1999, 3236 posts, RR: 7
Reply 3, posted (12 years 5 months 6 days 4 hours ago) and read 1905 times:
To give you some idea, on a flight earlier this month from DTW to SFO on a 757, our pilot told us how much fuel we would be burning. I don't remember how many pounds he said, but I do remember that he also said it would be enough to power a minivan or SUV for 8 years.
So my guess is that an Insight would get better mileage than a 747.
But compare how long it would take to get from DTW to SFO in a 757 or 747 versus an Insight, and I think it's worth it.
Ha763 From United States of America, joined Jan 2003, 3730 posts, RR: 5
Reply 7, posted (12 years 5 months 6 days 3 hours ago) and read 1883 times:
This is assuming that the Insight gets a combined 65 mpg and carries only 1 person a majority of the time and a 747-400 carries 400 pax and travels 1 mile on 5 gallons of fuel.
To travel the distance the Insight travels on 1 gallon of gas, a 747 needs 325 gallons of fuel (65 x 5 gallons per mile). Divide that by 400 pax, you get 0.8125 gallons of fuel to transport 1 pax 65 miles. So using these assumptions, the 747 wins the gallons per person comparison.
But since you asked mpg, the Insight wins with 61 city/68 highway. The 747 gets 0.2 mpg
Ybacpa From United States of America, joined Feb 2001, 1108 posts, RR: 1
Reply 10, posted (12 years 5 months 5 days 12 hours ago) and read 1820 times:
In reality, airline load factors are not 100%. So, a typical 747-400 flight probably has about 80% of its seats filled. Therefore, its miles per person is most likely about the same as a Honda Insight with one occupant (adjusting Ha763's math slightly: a 747-400 typically uses 1.015625 gallons to transport one passenger 65 miles).
On the flip side, a Honda Insight can seat 4 comfortably (or is it 5?). So it requires .25 gallons of fuel to tranport 4 seats 65 miles.
The 747-400 uses more fuel per person at typical load factors than the Honda Insight does with any load factor. The only time a 747-400 is more efficient, assuming the numbers we are working with here are accurate, is when it is close to fully loaded with passengers.
Of course, the more interesting statistic is the fuel cost per person / seat over the same distance. This is where the 747 clearly wins, even at the higher jet fuel prices today.
SkyTeam: The alliance for third rate airlines finally getting their act together!
AvObserver From United States of America, joined Apr 2002, 2479 posts, RR: 8
Reply 11, posted (12 years 5 months 5 days 3 hours ago) and read 1779 times:
"On the flip side, a Honda Insight can seat 4 comfortably (or is it 5?). So it requires .25 gallons of fuel to tranport 4 seats 65 miles."
Ybacpa, the Honda Insight is a 2-seater, you may be thinking of the 4-5 seat Civic Hybrid. That doesn't change the end result but it narrows the Insight's superiority. In any case, the Insight would be much less pleasant on a transoceanic trip than the 747, to say the least (blub, blub).