Aviation Supplies CX-2 User manual

Flight Computer
Aviation Supplies & Academics, Inc.
Newcastle, Washington 98059-3153
CX-2 Manual 05/15/2007 11:17 AM Page 1

2
CX-2 Pathfinder
Flight Computer Instructions
© 2001 – 2007 ASA
All rights reserved. Published 2001.
AirClassics and CX-2 are trademarks
of Aviation Supplies & Academics, Inc.
Aviation Supplies & Academics, Inc.
7005 132nd Place SE
Newcastle, WA 98059-3153
www.asa2fly.com
Printed in China
11 10 09 08 07 9 8 7 6 5 4 3
Visit the ASA website (www.asa2fly.com) for any manual
revisions, technical support, and FAQs for this product as
they become available.
CX-2 Manual 05/15/2007 11:17 AM Page 2

CONTENTS
Page
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . .5
KEYPAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
GETTING STARTED . . . . . . . . . . . . . . . . . . . . . .10
CONVERSIONS . . . . . . . . . . . . . . . . . . . . . . . . .11
Nautical to Statute/Statute to Nautical . . . .11
Nautical to Kilometers/
Kilometers to Nautical . . . . . . . . . . . . . . .11
Kilometers to Statute/
Statute to Kilometers . . . . . . . . . . . . . . . .12
Feet to Meters/Meters to Feet . . . . . . . . . . .12
Pounds to Kilograms/
Kilograms to Pounds . . . . . . . . . . . . . . . . .13
Gallons to Liters/Liters to Gallons . . . . . . . . .13
H.h to HH:MM:SS/HH:MM:SS to H.h . . . . . . .13
Fahrenheit to Celsius/
Celsius to Fahrenheit . . . . . . . . . . . . . . . .14
Millibars to Inches/Inches to Millibars . . . . . .15
MENU SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . .15
CALCULATOR . . . . . . . . . . . . . . . . . . . . . . . . . .18
FLIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Press Alt . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Density Alt . . . . . . . . . . . . . . . . . . . . . . . . .20
Std Atmos . . . . . . . . . . . . . . . . . . . . . . . . .20
Cloud Base . . . . . . . . . . . . . . . . . . . . . . . . .21
Airspeed . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Plan TAS . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Act TAS . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Req CAS . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Plan MACH# . . . . . . . . . . . . . . . . . . . . . . . .25
Act MACH# . . . . . . . . . . . . . . . . . . . . . . . .26
3
Continued
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Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Fuel Burn . . . . . . . . . . . . . . . . . . . . . . . . . .26
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . .27
Endurance . . . . . . . . . . . . . . . . . . . . . . . . .27
Plan Leg . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Hdg/GS . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Hdg/TAS . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Compass Hdg . . . . . . . . . . . . . . . . . . . . . .30
Leg Time . . . . . . . . . . . . . . . . . . . . . . . . . .31
ETA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
To/From . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Act Leg . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Dist Flown . . . . . . . . . . . . . . . . . . . . . . . . .33
GS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Unknown Wind . . . . . . . . . . . . . . . . . . . . .34
X/H-Wind . . . . . . . . . . . . . . . . . . . . . . . . . .34
Gliding . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Glide Dist . . . . . . . . . . . . . . . . . . . . . . . . . .35
Glide Desc . . . . . . . . . . . . . . . . . . . . . . . . .36
Glide Ratio . . . . . . . . . . . . . . . . . . . . . . . . .36
WT/BAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
CLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
TIMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Count Down . . . . . . . . . . . . . . . . . . . . . . . . .46
APPENDIX A: Sample Problems . . . . . . . . . . . .47
APPENDIX B: Service Policy . . . . . . . . . . . . . . .54
Troubleshooting . . . . . . . . . . . . . . . . . . . . . .54
Battery Replacement . . . . . . . . . . . . . . . . . .55
Limited Warranty . . . . . . . . . . . . . . . . . . . .56
APPENDIX C: Abbreviations Guide . . . . . . . . .58
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
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INTRODUCTION
ASA’ s CX-2 is the next generation of aviation comput-
ers. Using the latest microchip and display technolo-
gies, it out-performs its most sophisticated electronic
rivals.
The features of the CX-2 make it the most versatile and
useful aviation calculator available.
1. May be used for FAA Exams. The CX-2 complies
with Advisory Circular (AC) 60-11, “Test Aids and
Materials that May be Used by Airman Knowledge
Testing Applicants.” Therefore you may bring the
CX-2 with you to the testing centers for all pilot,
mechanic, and dispatcher FAA exams.
2. Numerous aviation functions. You can calculate
everything from true airspeed and Mach number, to
headwind/crosswind components and center of
cravity (CG), and everything in between. A menu
of 34 aviation functions gives you access to 40 avi-
ation calculations. The menu structure provides
easy entry, review, and editing within each function.
3. User-friendly. The LCD screen displays a menu of
functions, or the inputs and outputs of a selected
function, for easy-to-read menus and data displays.
The inputs and outputs of each function are sepa-
rated on the display screen so it is clear which num-
bers were entered and which were calculated.
Inputs and outputs are clearly labeled and the
answers or results are displayed along with their
corresponding units of measurement. The menu
organization reflects how a flight is normally
planned and executed. This results in a natural flow
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from one function to the next with a minimum of
keystrokes: to plan a flight, simply work from the
menus in sequential order as you fill in your flight
plan form.
4. Ergonomic design. The CX-2 features a very simple
keyboard and slim design. The carrying case will
protect your computer inside the flight bag, and fits
on the backside of the unit for easy storage while in
use.
5. Unit conversions. The CX-2 has 16 reciprocal unit-
conversions: nautical and statute miles, nautical
miles and kilometers, feet and meters, pounds and
kilograms, gallons and liters, time in an hours:min-
utes:seconds format and time in decimal format,
Fahrenheit and Celsius temperatures, and millibars
and inches of mercury.
6
CONTRAST
Figure 1: The CX-2 flight computer
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6. Timers and clocks. The CX-2 has two timers: a stop-
watch that counts up, and a count down timer. The
stopwatch can be used to keep track of elapsed time
or to determine the time required to fly a known
distance. The count down timer can be used as a
reminder to switch fuel tanks, or to determine the
missed approach point on a nonprecision instru-
ment approach. An internal clock continues run-
ning even when the flight computer is turned off.
Both UTC and local time can be displayed, and the
time can be set with either UTC or local time.
7. Interactive functions. The CX-2 is designed so the
functions can be used together. You can perform
“chain” calculations where the answer to a preced-
ing problem is automatically entered in subsequent
problems. Standard mathematical calculations and
conversions can be performed within each aviation
function.
KEYPAD
The CX-2’s simple keypad was made possible because
of the sophisticated display screen and menu structure.
The advantages of such a keypad are twofold: A calcu-
lator with 29 keys is simpler to use than one with 40 or
more, and it is small enough to fit in a shirt pocket.
Both advantages make the CX-2 more useful to a pilot
in day-to-day operations.
Selects each of the four
main menus.
Selects second or shifted function for other keys.
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Changes display to the previous menu.
and Used to navigate about the menu struc-
ture. When alternated with , darkens and
lightens display screen (toggle between and
the or until the desired shading is
achieved).
Selects highlighted menu item, enters current
input line when function is requesting input.
Clears current input line. In calculator mode,
clears the math completely.
8
CONTRAST
Figure 2: CX-2 keypad
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Changes sign (positive or negative) of current
input line.
Separates hours from minutes and minutes from
seconds on time inputs. For example, 2 hours,
38 minutes and 45 seconds will display as
02:38:45. When preceded by key, activates
the square root function.
Tu rns CX-2 on and resets to calculator mode.
When preceded by key, turns CX-2 off.
Standard arithmetic operators.
Numeric keys for selecting menu item and enter-
ing numbers. Conversion functions active if pre-
ceded by the key.
Decimal point.
Completes the calculation.
Resetting: To reset the CX-2, remove all of the batter-
ies. This will clear all stored information. The FAA
requires that all the memory in an electronic flight
computer be cleared prior to use during FAA
Knowledge Exams.
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GETTING STARTED
Push the button to turn the flight computer on.
Pressing the key followed by the key will
turn the calculator off. The CX-2 will automatically
turn off if no key is pressed for 7 minutes. This feature
prevents battery exhaustion if the computer is inadver-
tently left on.
When first turned on, the CX-2 is in calculator
mode with **Calculator** displayed at the top of the
screen. The CX-2 can be returned to this mode at any
time by pressing the key. Each time the computer
returns to the calculator mode, an internal test checks
the battery power. LOW BATTERY displays on the cal-
culator screen when less than an hour of power
remains, as a recommendation to change the batteries.
An “E” is displayed whenever the result of the
arithmetic operation is a number that exceeds 8 digits.
You may either press to clear the display, or just
type in a new number.
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