Dear Robert,
I'm with you on this; I don't think that these suggest that Bevirt has yet
got to the point of collecting 'Rules of Thumb' that assume we are already
committed to SI. As you point out, it looks like his commitment is to
conversions between dual measurements.
As a matter of interest this is my current definition of a Rule of Thumb.
'Rules of Thumb are a kind of tool that helps to identify a problem or to
give guidance in forming a solution in any given situation. They are guides
that fall somewhere between a scientific or mathematical formula and a shot
in the dark. Rules of Thumb are usually designed to be easy to remember and
to be shared by passing them along to others.'
Thanks for your trouble.
--
Cheers,
Pat Naughtin
CAMS - Certified Advanced Metrication Specialist
- United States Metric Association
ASM - Accredited Speaking Member
- National Speakers Association of Australia
Member, International Federation for Professional Speakers
on 2001/07/14 12.22, [EMAIL PROTECTED] at [EMAIL PROTECTED] wrote:
> 2001 July 13
> Pat Naughtin,
> I just received by mail copies of the viewgraphs W. D. Bevirt
> showed in his talk at the ASHRAE meeting in June.
> They have only a few rules of thumb. Many have conversions
> which I myself try to avoid.
>
> He does not offer e-mail copies. I do not have a scanner so I can
> not send copies by e-mail.
> I list the subject of each viewgraph by its title.
>
> RULES OF METRIC THUMB His name
> METRIC AND SI measurements and conversions
> HISTORY Summarians Egyptians units
> HISTORY Romans units
> HISTORY Metric from French revolution
> HISTORY 1875 1876 US Metric failed 1896 1901
> HISTORY 3 different mm
> USING METRIC Fed constr $10 billion / y
> USING METRIC Calc faster learn quickly No fractions
> VISUALIZING METRIC 1mm = dine 1 m = 1 yard plus 3.3 in.
> I never do this.
> METRIC RULES style for SI
> METRIC RULES more style
> NUMBERS more rules zero before decimal point etc.
> PREFIXES >1 list
> PREFIXES < 1 list
> HVAC CONVERSIONS (Approximate) inch cfm gpm
> HVAC CONVERSIONS (Approximate) pressure friction loss heat
> METRIC RULES Temperature F celsius Rankine kelvin
> TEMPERATURES deg C 30 warm etc
> CONVERSIONS soft(exact) hard(exact) list
> ELECTRICITY US same as Metric
> CEILING GRIDS 24 x 48 soft hard diff �600 mm is 3/8 in. smaller�
> CONVERSIONS rounding
> PROPERTY DIMENSIONS linear 2 decimals area 1 decimal
> property no decimal
> CALCULATIONS 3 ft.-3 3/8 in. � 4 = ? Etc.
> VOLUME mL = milliliter ML = megaliter
> HEAT soft hard [approx]
> POWER conversions motors boilers gravity torque etc.
> AIR std conversions
> OTHER MEASUREMENTS pipe sizes conversions
> automobile good picture with specs SI only
> automobile list engine volume weight kg tire pres fuel vol cooling vol
> OTHER MEASUREMENTS like list we have
> 2000 lb. Of Chinese soup = Won Ton etc.
>
>
> I would not use this list. Not enough showing ease of SI.
> To many conversions. I never list a difference in inches.
>
> Robert Bushnell
>
