Re: How to get better MPG when towing???
Like I said - it depends on what you want to consider "massive". I would call that large, but not massive - and it also provides enough mileage for about 90% of the automobile trips taken in the United States.
You also seem to want to ignore hydrogen fuel cells which can get the same amount of energy into a significantly smaller area - yet again increasing the volumetric energy density. They aren't feasible yet, but there is certainly a possibility they could surpass gasoline in volumetric energy density. After all - gasoline is just a hydrogen storage mechanism itself.
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Aaron
To see how ridiculous the BMW car is:
http://www.spiegel.de/international/spiegel/0,1518,448648,00.html
"BMW's thermo-tank, specially designed to hold liquid hydrogen as well as regular gasoline, has the same diameter as the drum of a washing machine. It has a volume of 170 liters (45 gallons) and takes up half the trunk. But it can only hold eight kilograms (17.6 lbs) of the extremely light hydrogen fuel -- barely enough for a 200 kilometer (124 mile) trip. What's more, some of the tank's contents have to be released as they heat up and evaporate -- even the best insulation system can't keep temperatures down forever. After nine days, half the tank load has gone bad."
Like I said - it depends on what you want to consider "massive". I would call that large, but not massive - and it also provides enough mileage for about 90% of the automobile trips taken in the United States.
You also seem to want to ignore hydrogen fuel cells which can get the same amount of energy into a significantly smaller area - yet again increasing the volumetric energy density. They aren't feasible yet, but there is certainly a possibility they could surpass gasoline in volumetric energy density. After all - gasoline is just a hydrogen storage mechanism itself.
--
Aaron