AOPA Pilot Magazine - December 2022 - 86

MIKKE FIZER
RUDDER & WRENCH
SWITCH
AND
SAVE
WX WATCH /
Dangerous
droplets
Supercooled, and looking for trouble
THOMAS A. HORNE
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YOU PROBABLY DON' T think much about
such exotic processes as supercooling or
changes in states of matter if you fly into a
cloud or precipitation this winter. Unless
maybe you were a chemistry major. No,
you're worried about the chances of
icing. Those chances, and the types of
icing, depend heavily on the nature of
the clouds or precipitation you encounter.
Of course, ambient temperature is one
of them, and here's where a big factor like
supercooling enters the picture.
When water droplets are below freez*Certain
points and purchase restrictions apply; see full Rewards
Terms and Conditions for full details at AOPA.org/creditcard.
1 Rewards points can be redeemed for Cash Back or other items provided
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and travel may vary.
ing, yet still in a liquid form, they're in a
supercooled state. They remain liquid
until they encounter condensation nuclei.
These could be tiny dirt or other particulates
suspended in the air, or a very large
" particulate " like your airplane. When the
droplets lose their molecular fluidity and
are given an object they can bond with,
86
AOPA PILOT / December 2022
that's when you can see ice accretions
begin to form on the airplane. First on the
smaller projections-hinges, rivet heads,
and other small-radius objects-then on
the wing and other leading edges.
Besides temperature, droplet size and
liquid water content (the volume of liquid
water in a cloud or precipitation sample)
are other components in the brew that can
put various forms of ice accretions on your
airplane. These disrupt lift, create drag, add
weight, and reduce thrust-no matter the
size of airplane or the power it can put out.
All types of ice are dangerous, even when
you see terms like " trace, " " light, " " moderate, "
or " heavy " attached to them in icing
forecasts. If you fly in " light " icing conditions
long enough, the accretions can build
to the point that they produce the effects
of " heavy " icing. This is one reason why
the Aviation Weather Center website uses

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AOPA Pilot Magazine - December 2022

Table of Contents for the Digital Edition of AOPA Pilot Magazine - December 2022

Contents
AOPA Pilot Magazine - December 2022 - Intro
AOPA Pilot Magazine - December 2022 - Cover1
AOPA Pilot Magazine - December 2022 - Cover2
AOPA Pilot Magazine - December 2022 - Contents
AOPA Pilot Magazine - December 2022 - 2
AOPA Pilot Magazine - December 2022 - 3
AOPA Pilot Magazine - December 2022 - 4
AOPA Pilot Magazine - December 2022 - 5
AOPA Pilot Magazine - December 2022 - 6
AOPA Pilot Magazine - December 2022 - 7
AOPA Pilot Magazine - December 2022 - 8
AOPA Pilot Magazine - December 2022 - 9
AOPA Pilot Magazine - December 2022 - 10
AOPA Pilot Magazine - December 2022 - 11
AOPA Pilot Magazine - December 2022 - 12
AOPA Pilot Magazine - December 2022 - 13
AOPA Pilot Magazine - December 2022 - 14
AOPA Pilot Magazine - December 2022 - 15
AOPA Pilot Magazine - December 2022 - 16
AOPA Pilot Magazine - December 2022 - 17
AOPA Pilot Magazine - December 2022 - 18
AOPA Pilot Magazine - December 2022 - 19
AOPA Pilot Magazine - December 2022 - 20
AOPA Pilot Magazine - December 2022 - 21
AOPA Pilot Magazine - December 2022 - 22
AOPA Pilot Magazine - December 2022 - 23
AOPA Pilot Magazine - December 2022 - 24
AOPA Pilot Magazine - December 2022 - 25
AOPA Pilot Magazine - December 2022 - 26
AOPA Pilot Magazine - December 2022 - 27
AOPA Pilot Magazine - December 2022 - 28
AOPA Pilot Magazine - December 2022 - 29
AOPA Pilot Magazine - December 2022 - 30
AOPA Pilot Magazine - December 2022 - 31
AOPA Pilot Magazine - December 2022 - 32
AOPA Pilot Magazine - December 2022 - 33
AOPA Pilot Magazine - December 2022 - 34
AOPA Pilot Magazine - December 2022 - 35
AOPA Pilot Magazine - December 2022 - 36
AOPA Pilot Magazine - December 2022 - 37
AOPA Pilot Magazine - December 2022 - 38
AOPA Pilot Magazine - December 2022 - 39
AOPA Pilot Magazine - December 2022 - 40
AOPA Pilot Magazine - December 2022 - 41
AOPA Pilot Magazine - December 2022 - 42
AOPA Pilot Magazine - December 2022 - 43
AOPA Pilot Magazine - December 2022 - 44
AOPA Pilot Magazine - December 2022 - 45
AOPA Pilot Magazine - December 2022 - 46
AOPA Pilot Magazine - December 2022 - 47
AOPA Pilot Magazine - December 2022 - 48
AOPA Pilot Magazine - December 2022 - 49
AOPA Pilot Magazine - December 2022 - 50
AOPA Pilot Magazine - December 2022 - 51
AOPA Pilot Magazine - December 2022 - 52
AOPA Pilot Magazine - December 2022 - 53
AOPA Pilot Magazine - December 2022 - 54
AOPA Pilot Magazine - December 2022 - 55
AOPA Pilot Magazine - December 2022 - 56
AOPA Pilot Magazine - December 2022 - 57
AOPA Pilot Magazine - December 2022 - 58
AOPA Pilot Magazine - December 2022 - 59
AOPA Pilot Magazine - December 2022 - 60
AOPA Pilot Magazine - December 2022 - 61
AOPA Pilot Magazine - December 2022 - 62
AOPA Pilot Magazine - December 2022 - 63
AOPA Pilot Magazine - December 2022 - 64
AOPA Pilot Magazine - December 2022 - 65
AOPA Pilot Magazine - December 2022 - 66
AOPA Pilot Magazine - December 2022 - 67
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AOPA Pilot Magazine - December 2022 - 69
AOPA Pilot Magazine - December 2022 - 70
AOPA Pilot Magazine - December 2022 - 71
AOPA Pilot Magazine - December 2022 - 72
AOPA Pilot Magazine - December 2022 - 73
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AOPA Pilot Magazine - December 2022 - 78
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AOPA Pilot Magazine - December 2022 - 86
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AOPA Pilot Magazine - December 2022 - 90
AOPA Pilot Magazine - December 2022 - 91
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AOPA Pilot Magazine - December 2022 - Cover3
AOPA Pilot Magazine - December 2022 - Cover4
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