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EVERYTHING FOR ELECTRONICS
graphite and other exotic lightweight building materials is Kite Builder
( www.kitebuilder.com). Make sure to check out their chart of weight vs.
relative stiffness for their products. Another source for lightweight components,
connectors, and 4-40 nylon hardware in bulk is Tower Hobbies ( www.tower
hobbies.com). They’re also a good source for R/C airplanes and helicopters —
great subjects for teardowns to learn about designing for minimum weight.
Good luck with your own weight loss program. NV
Consistent Color Coding
Bryan Bergeron’s perspective on
color coding got my attention. I tend
to do the same thing documenting
my stuff, not that I build much right
now. However, I wanted to give a
little info as to why bombs are color
coded the same way every time.
This was learned — the hard way
— during WW II. The Germans — who
are very methodical — taught the rest
of us that if we do not want to blow
ourselves up with our own bombs
when we have to defuse them, to
ALWAYS color code the connections/
wires the same. ALWAYS.
The quoted life expectancy in
Britain during WW II for the men who
defused unexploded bombs from
German planes was six weeks. They
lost at least one man on almost every
new bomb that was defused. The guy
would be yelling which wire he was
cutting before he did it so it could be
documented before he died because
it was highly probable that he'd cut
the wrong wire in an unknown
situation. Even with the "known"
bombs, situations weren't always safe.
Continued on page 53
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July 2012 9