Re: Anyone got any more paper napkins?
Yes,
I can't find (or be bothered to look further) for the reference I found for a 747's fuel consumption. I've just looked and found a very different number of 18,000 gallons in 5 hours. Assuming these are the undersized US gallons that's about 16365924 cc/hr - or approximately 31,256.5393 grapefruits.
Cheers.