Dear John,

You're right. Once again I became confused by that stupid unit construction L/100 km!

My note should have read:

Average Boeing 747
34 megajoules per litre (34 MJ/L) for aircraft fuel, and
1 600 litres per 100 kilometres (1 600 L/100 km) fuel consumption, then
an average Boeing 747 consumes 544 000 joules of energy for each metre it travels (544 000 J/m).

Summary
Car                         3 200 J/m
School bus        13 510 J/m
Truck             15 440 J/m
Boeing 747      544 000 J/m

These figures are now easily comparable.

Cheers and thanks for your help,

Pat Naughtin
Author of the ebook, Metrication Leaders Guide, that you can obtain from http://metricationmatters.com/MetricationLeadersGuideInfo.html
PO Box 305 Belmont 3216,
Geelong, Australia
Phone: 61 3 5241 2008

Metric system consultant, writer, and speaker, Pat Naughtin, has helped thousands of people and hundreds of companies upgrade to the modern metric system smoothly, quickly, and so economically that they now save thousands each year when buying, processing, or selling for their businesses. Pat provides services and resources for many different trades, crafts, and professions for commercial, industrial and government metrication leaders in Asia, Europe, and in the USA. Pat's clients include the Australian Government, Google, NASA, NIST, and the metric associations of Canada, the UK, and the USA. See http://www.metricationmatters.com for more metrication information, contact Pat at [email protected] or to get the free 'Metrication matters' newsletter go to: http://www.metricationmatters.com/newsletter to subscribe.

On 2009/09/19, at 09:02 , John M. Steele wrote:

Average Boeing 747
34 megajoules per litre (34 MJ/L) for diesel fuel, and
16 litres per 100 kilometres (16 L/100 km) fuel consumption, then
an average truck consumes 5 440 joules of energy for each metre it travels (5 440 J/m).

Summary
Car    3 200 J/m
Boeing 747   5 440 J/m
School bus 13 510 J/m
Truck 15 440 J/m

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