Flight Training - November/December 2022 - 12

PREFLIGHT WHAT AM I?
BY JILL W. TALLMAN
OLD RELIABLE
It'll work just fine, but you'll want to remember
that when reading it the compass appears
backward. This is because you're reading
the back side of the compass. For example,
when turning right from a heading of 360 to
090, the compass rotates counter-clockwise,
making it look like you're turning left.
NEW LOOK
THE MAGNETIC COMPASS
STEERING YOU STRAIGHT
PILOTS LIKE TO BEMOAN THAT PISTON AIRCRAFT AND CARBURETED ENGINES
are old school. And they are, particularly when you consider the level of computerization
in today's car engines. But the airplane engine's got nothin' on the most
basic piece of navigation equipment commonly found in aircraft: the magnetic
compass. Its technology dates back to the 11th or 12th century, when historians
believe China first used the magnetic compass for navigation.
Since it made the inevitable leap to aviation, the magnetic compass has been
standard equipment-a hard-working and reliable tool that doesn't require much
maintenance. The instrument bobbing away on your airplane's glareshield or
instrument panel has very few parts: a compass card that swings on a pivot, two
magnets and a float. The parts are submerged in mineral spirits or kerosene. The
face of the instrument has a reference point called a lubber line, where the direction
you're headed is referenced.
jill.tallman@aopa.org
A vertical card compass has a compass
card oriented vertically so that when the
aircraft turns, the card shows a turn in the
same direction. It looks more like a heading
indicator, which makes it somewhat easier
to read. Owners of vintage aircraft will
frequently update wet compasses with
the somewhat more modern vertical card
compass. Both types of compasses, however,
have inherent errors: variation, deviation, dip
error, turning error, acceleration error, and

Flight Training - November/December 2022

Table of Contents for the Digital Edition of Flight Training - November/December 2022

Contents
Flight Training - November/December 2022 - Intro
Flight Training - November/December 2022 - Cover1
Flight Training - November/December 2022 - Cover2
Flight Training - November/December 2022 - Contents
Flight Training - November/December 2022 - 2
Flight Training - November/December 2022 - 3
Flight Training - November/December 2022 - 4
Flight Training - November/December 2022 - 5
Flight Training - November/December 2022 - 6
Flight Training - November/December 2022 - 7
Flight Training - November/December 2022 - 8
Flight Training - November/December 2022 - 9
Flight Training - November/December 2022 - 10
Flight Training - November/December 2022 - 11
Flight Training - November/December 2022 - 12
Flight Training - November/December 2022 - 13
Flight Training - November/December 2022 - 14
Flight Training - November/December 2022 - 15
Flight Training - November/December 2022 - 16
Flight Training - November/December 2022 - 17
Flight Training - November/December 2022 - 18
Flight Training - November/December 2022 - 19
Flight Training - November/December 2022 - 20
Flight Training - November/December 2022 - 21
Flight Training - November/December 2022 - 22
Flight Training - November/December 2022 - 23
Flight Training - November/December 2022 - 24
Flight Training - November/December 2022 - 25
Flight Training - November/December 2022 - 26
Flight Training - November/December 2022 - 27
Flight Training - November/December 2022 - 28
Flight Training - November/December 2022 - 29
Flight Training - November/December 2022 - 30
Flight Training - November/December 2022 - 31
Flight Training - November/December 2022 - 32
Flight Training - November/December 2022 - 33
Flight Training - November/December 2022 - 34
Flight Training - November/December 2022 - 35
Flight Training - November/December 2022 - 36
Flight Training - November/December 2022 - 37
Flight Training - November/December 2022 - 38
Flight Training - November/December 2022 - 39
Flight Training - November/December 2022 - 40
Flight Training - November/December 2022 - 41
Flight Training - November/December 2022 - 42
Flight Training - November/December 2022 - 43
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Flight Training - November/December 2022 - 45
Flight Training - November/December 2022 - 46
Flight Training - November/December 2022 - 47
Flight Training - November/December 2022 - 48
Flight Training - November/December 2022 - 49
Flight Training - November/December 2022 - 50
Flight Training - November/December 2022 - 51
Flight Training - November/December 2022 - 52
Flight Training - November/December 2022 - 53
Flight Training - November/December 2022 - 54
Flight Training - November/December 2022 - 55
Flight Training - November/December 2022 - 56
Flight Training - November/December 2022 - Cover3
Flight Training - November/December 2022 - Cover4
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