🚀 go-pugleaf

In article <1990Sep13.173238.9156@canterbury.ac.nz> elec140@canterbury.ac.nz writes:
>In article <5170089@hplsla.HP.COM>, tomb@hplsla.HP.COM (Tom Bruhns) writes:
>> jeffw@midas.WR.TEK.COM (Jeff Winslow) writes:
>>>In article <5170088@hplsla.HP.COM> tomb@hplsla.HP.COM (Tom Bruhns) writes:
>>>>Dunno how it all got started, but you should note that a change of
>>>>3 in gauge number corresponds exactly to a 2:1 cross-section change.
>>
>>>Are you sure about that, Tom? According to the tables I have here, it's
>>>about half a percent off.
>
>Just to add more fuel to the fire, if you use decibels (defined as 10log(x),
>where the log is base 10 and the x is a ratio) then a ratio of 2 is 3.01dB.
>Decibels are a common engineering unit (at least in Electrical Engineering), so
>perhaps the gauges sizes are based on this.
>

I tried that... B&S wire gauge seems to be roughly equal to

	-20 * log10 (wire circumference in inches) 

or, alternatively, wire diameter in inches is just

	1 / (pi * 10^(gauge/20))

which seems to fit my B&S wire gauge table reasonably well...
I'll be very pleased if this is actually THE formula...  

--
Josip Loncaric / SRC / U. of Maryland / <josip@ra.src.umd.edu>
--------------------------------------------------------------
!            Today's Special: Opinions....$0.02 each         !
--------------------------------------------------------------