I would like to thank all of the BPL forum users that have contributed to this debate.
I never thought for a second that BPL would go metric only and that all forum users would use SI that would be too simple, to quote a former Australian Prime Minister “Life is not meant to be easy”. The best that I could have hoped for is for forum users to use the correct terminology and state what standard is being used that at least would allow for correct conversions, it is not difficult to put US fl oz or US cup, but in reality this will not happen either.
I get the feeling that consensus is “yes” BPL and the US should go metric but it is all too hard. Unless the US government makes it compulsory to go metric then it will not happen.
I am very disappointed with this weeks BPL .com news, the “Should BPL go metric?” thread was not mentioned, actually Forum Heat was not even there, is this a message or an oversight from the BPL Editors.
It could be argued that if BPL accepts International members and their money then it is an International magazine not only a US domestic magazine; therefore I believe that it should cater to its readers as if it is an international magazine and use metric as its standard. It is not illegal for BPL to go metric if you read the NIST site it is encouraged. In a world population of about 6.6 Billion the non-metric population make up a less than 350 million. The US measurement system is too messy and archaic.
Below are some paragraphs extracted from the US Metric conversion law.
Title 15 U.S.C. Chapter 6 § (204) 205a - 205l
METRIC CONVERSION LAW
(Pub. L. 94-168, §2, Metric Conversion Act, Dec. 23, 1975)
§ 204. Metric system authorized. - It shall be lawful throughout the United States of America to employ the weights and measures of the metric system; and no contract or dealing, or pleading in any court, shall be deemed invalid or liable to objection because the weights or measures expressed or referred to therein are weights or measures of the metric system. (14 Stat. 339, Adopted July 28,1866)
This law goes on to mention: (2) Although the use of metric measurement standards in the United States has been authorized by law since 1866 this Nation today is the only industrially developed nation which has not established a national policy of committing itself and taking steps to facilitate conversion to the metric system.
4) Industry in the United States is often at a competitive disadvantage when dealing in international markets because of its nonstandard measurement system, and is sometimes excluded when it is unable to deliver goods which are measured in metric terms.
Has anything changed since 1975 ????
I would also like to comment on this statement: "I used 1 oz (29 ml) of alcohol to boil 2 cups (.47 L) of water from 20C (68 F)." These are firmly established, trade-legal measurements”
The use of “oz” as a measurement of volume is not trade legal measurement According to the (US) National Institute of Standards and Technology http://www.nist.gov/ ounce (oz) is a unit of mass or weight not volume, volume is defined by fluid ounce or fl oz. The use of oz as a measurement of volume is not, and while the cup is a legal measurement it does not feature as a major legal volume measurement unit.
The NIST site is a wealth of information.
This is an interesting document:
NIST Handbook 44 - 2007 Edition
Specifications, Tolerances, and Other Technical Requirements
for Weighing and Measuring Devices.
And is this is found at http://ts.nist.gov/WeightsAndMeasures/h44-07.cfm
An interesting paragraph from this article: Units and Systems of Measurement
Their Origin, Development, and Present Status
From this we see that in the customary British system an avoirdupois ounce of water at 62 °F has a volume of one fluid ounce, because 10 pounds is equivalent to 160 avoirdupois ounces, and 1 gallon is equivalent to 4 quarts, or 160 fluid ounces. This convenient relation does not exist in the U. S. system because a U. S. gallon of water at 62 °F weighs about 8⅓ pounds, or 133⅓ avoirdupois ounces, and the U. S. gallon is equivalent to 4 x 32, or 128 fluid ounces.
The metric system has this convenient relationship which it can make life easy.
I would also like to point out that in my main area of interest MYOG Backpacking stoves in recent times a high proportion of the main forum contributors are from metric countries, in the MYOG canister side Yukio Yamakawa, Roger Caffin and myself and in the alcohol side Franco Darioli, Ke Wu, and Yukio Yamakawa.
This will be one of my last posts on this topic as I want to get back to my latest projects, a sub 100g (3.53 oz) pot, windshield and liquid feed canister stove and I am currently doing some work on understanding hot gas flow around a pot and windshield will post results soon.