AOPA Pilot Magazine - November 2022 - 93

RUDDER & WRENCH
HINDSIGHT MAY BE
altitude at which the airplane must fly to
maintain the line of sight: V2
/11.3, where V
is the groundspeed in knots. For example, if
a Cessna 172 flies the maneuver at 90 knots,
the pivotal altitude is only 717 feet above
the ground. But in a 20-knot wind that
blows perpendicular to the line connecting
the pylons, the groundspeed will slow
to 70 knots and the pivotal altitude is only
434 feet above the ground. If the engine
fails during that maneuver, the pilot had
better have some great landing spots
picked out. Better yet, she should either
choose an airspeed that always guarantees
a groundspeed of at least 75 knots to stay
at least 500 feet above the ground. What
about eights on pylons in your Piper Cub
where everything happens at 60 knots?
Don't even think about it!
Gliding after engine failure
No matter what altitude I file for a trip over
the Smoky Mountains, I always request
2,000 feet higher from ATC once I'm in
the air and see what's below. The thickly
wooded mountainous terrain reminds me
how few options I have if my engine were
to quit. The question isn't when rescuers
would find me; rather, it's if.
Gliding distance is proportional to
height above the ground, so increasing
from 3,000 feet agl to 5,000 feet agl-a 67
percent increase in altitude-provides the
same amount of increase in glide distance.
Even more impressive is that the area available
in a glide depends on the square of
height above the ground, so that 67 percent
increase in altitude translates to a 178 percent
increase in area attainable in a glide.
Remember that favorable terrain might be
in any direction, so even a small increase
in altitude makes many more landing sites
available in an engine-out scenario.
While a degree in mathematics
certainly isn't necessary to become a
pilot, these tools can provide insight into
the most important changes pilots can
make for a safe outcome. And especially
when you see the power of two, remember
that there is valuable lesson to learn.
Catherine Cavagnaro owns Ace Aerobatic
School in Sewanee, Tennessee, and is professor
of mathematics at Sewanee: The
University of the South.
aceaerobaticschool.com
AOPA PILOT / November 2022
93
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2 22
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AOPA Pilot Magazine - November 2022

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

Contents
AOPA Pilot Magazine - November 2022 - Intro
AOPA Pilot Magazine - November 2022 - CT1
AOPA Pilot Magazine - November 2022 - CT2
AOPA Pilot Magazine - November 2022 - Cover1
AOPA Pilot Magazine - November 2022 - Cover2
AOPA Pilot Magazine - November 2022 - Contents
AOPA Pilot Magazine - November 2022 - 2
AOPA Pilot Magazine - November 2022 - 3
AOPA Pilot Magazine - November 2022 - 4
AOPA Pilot Magazine - November 2022 - 5
AOPA Pilot Magazine - November 2022 - 6
AOPA Pilot Magazine - November 2022 - 7
AOPA Pilot Magazine - November 2022 - 8
AOPA Pilot Magazine - November 2022 - 9
AOPA Pilot Magazine - November 2022 - 10
AOPA Pilot Magazine - November 2022 - 11
AOPA Pilot Magazine - November 2022 - 12
AOPA Pilot Magazine - November 2022 - 13
AOPA Pilot Magazine - November 2022 - 14
AOPA Pilot Magazine - November 2022 - 15
AOPA Pilot Magazine - November 2022 - 16
AOPA Pilot Magazine - November 2022 - 17
AOPA Pilot Magazine - November 2022 - 18
AOPA Pilot Magazine - November 2022 - 19
AOPA Pilot Magazine - November 2022 - 20
AOPA Pilot Magazine - November 2022 - 21
AOPA Pilot Magazine - November 2022 - 22
AOPA Pilot Magazine - November 2022 - 23
AOPA Pilot Magazine - November 2022 - 24
AOPA Pilot Magazine - November 2022 - 25
AOPA Pilot Magazine - November 2022 - 26
AOPA Pilot Magazine - November 2022 - 27
AOPA Pilot Magazine - November 2022 - 28
AOPA Pilot Magazine - November 2022 - 29
AOPA Pilot Magazine - November 2022 - 30
AOPA Pilot Magazine - November 2022 - 31
AOPA Pilot Magazine - November 2022 - 32
AOPA Pilot Magazine - November 2022 - 33
AOPA Pilot Magazine - November 2022 - 34
AOPA Pilot Magazine - November 2022 - 35
AOPA Pilot Magazine - November 2022 - 36
AOPA Pilot Magazine - November 2022 - 37
AOPA Pilot Magazine - November 2022 - 38
AOPA Pilot Magazine - November 2022 - 39
AOPA Pilot Magazine - November 2022 - 40
AOPA Pilot Magazine - November 2022 - 41
AOPA Pilot Magazine - November 2022 - 42
AOPA Pilot Magazine - November 2022 - 43
AOPA Pilot Magazine - November 2022 - 44
AOPA Pilot Magazine - November 2022 - 45
AOPA Pilot Magazine - November 2022 - 46
AOPA Pilot Magazine - November 2022 - 47
AOPA Pilot Magazine - November 2022 - 48
AOPA Pilot Magazine - November 2022 - R-1
AOPA Pilot Magazine - November 2022 - R-2
AOPA Pilot Magazine - November 2022 - R-3
AOPA Pilot Magazine - November 2022 - R-4
AOPA Pilot Magazine - November 2022 - R-5
AOPA Pilot Magazine - November 2022 - R-6
AOPA Pilot Magazine - November 2022 - R-7
AOPA Pilot Magazine - November 2022 - R-8
AOPA Pilot Magazine - November 2022 - 49
AOPA Pilot Magazine - November 2022 - 50
AOPA Pilot Magazine - November 2022 - 51
AOPA Pilot Magazine - November 2022 - 52
AOPA Pilot Magazine - November 2022 - 53
AOPA Pilot Magazine - November 2022 - 54
AOPA Pilot Magazine - November 2022 - 55
AOPA Pilot Magazine - November 2022 - 56
AOPA Pilot Magazine - November 2022 - 57
AOPA Pilot Magazine - November 2022 - 58
AOPA Pilot Magazine - November 2022 - 59
AOPA Pilot Magazine - November 2022 - 60
AOPA Pilot Magazine - November 2022 - 61
AOPA Pilot Magazine - November 2022 - 62
AOPA Pilot Magazine - November 2022 - 63
AOPA Pilot Magazine - November 2022 - 64
AOPA Pilot Magazine - November 2022 - 65
AOPA Pilot Magazine - November 2022 - 66
AOPA Pilot Magazine - November 2022 - 67
AOPA Pilot Magazine - November 2022 - 68
AOPA Pilot Magazine - November 2022 - 69
AOPA Pilot Magazine - November 2022 - 70
AOPA Pilot Magazine - November 2022 - 71
AOPA Pilot Magazine - November 2022 - 72
AOPA Pilot Magazine - November 2022 - 73
AOPA Pilot Magazine - November 2022 - 74
AOPA Pilot Magazine - November 2022 - 75
AOPA Pilot Magazine - November 2022 - 76
AOPA Pilot Magazine - November 2022 - 77
AOPA Pilot Magazine - November 2022 - 78
AOPA Pilot Magazine - November 2022 - 79
AOPA Pilot Magazine - November 2022 - 80
AOPA Pilot Magazine - November 2022 - 81
AOPA Pilot Magazine - November 2022 - 82
AOPA Pilot Magazine - November 2022 - 83
AOPA Pilot Magazine - November 2022 - 84
AOPA Pilot Magazine - November 2022 - 85
AOPA Pilot Magazine - November 2022 - 86
AOPA Pilot Magazine - November 2022 - 87
AOPA Pilot Magazine - November 2022 - 88
AOPA Pilot Magazine - November 2022 - 89
AOPA Pilot Magazine - November 2022 - 90
AOPA Pilot Magazine - November 2022 - 91
AOPA Pilot Magazine - November 2022 - 92
AOPA Pilot Magazine - November 2022 - 93
AOPA Pilot Magazine - November 2022 - 94
AOPA Pilot Magazine - November 2022 - 95
AOPA Pilot Magazine - November 2022 - 96
AOPA Pilot Magazine - November 2022 - 97
AOPA Pilot Magazine - November 2022 - 98
AOPA Pilot Magazine - November 2022 - 99
AOPA Pilot Magazine - November 2022 - 100
AOPA Pilot Magazine - November 2022 - 101
AOPA Pilot Magazine - November 2022 - 102
AOPA Pilot Magazine - November 2022 - 103
AOPA Pilot Magazine - November 2022 - 104
AOPA Pilot Magazine - November 2022 - 105
AOPA Pilot Magazine - November 2022 - 106
AOPA Pilot Magazine - November 2022 - 107
AOPA Pilot Magazine - November 2022 - 108
AOPA Pilot Magazine - November 2022 - 109
AOPA Pilot Magazine - November 2022 - 110
AOPA Pilot Magazine - November 2022 - 111
AOPA Pilot Magazine - November 2022 - 112
AOPA Pilot Magazine - November 2022 - Cover3
AOPA Pilot Magazine - November 2022 - Cover4
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