Apollo GX50, Installation Manual

Page 1: ...Apollo Model GX50 GPS Model GX60 GPS Comm Model GX65 GPS Comm Installation Manual Installation Manual Installation Manual Installation Manual March 1999 560 0959 03 ...

Page 2: ...Inc Due to II Morrow s commitment to constantly improve the quality and performance of our products information contained in this document is subject to change without notice II Morrow Apollo and Flybrary are registered trademarks of II Morrow Inc II Morrow Inc 2345 Turner Rd SE PO Box 13549 Salem OR 97302 Salem OR 97309 USA Phone 503 581 8101 1 800 525 6726 In Canada 1 800 654 3415 FAX 503 364 21...

Page 3: ...of this article are minimum performance standards It is the responsibility of those desiring to install this article on or within a specific type or class of aircraft to determine that the aircraft operating conditions are within TSO standards The article may be installed only if further evaluation by the applicant documents an acceptable installation and is approved by the Administrator Source FA...

Page 4: ...NOTES ...

Page 5: ...EW 9 INSTALLATION CONSIDERATIONS 9 MOUNTING CONSIDERATIONS 9 MINIMUM SYSTEM CONFIGURATION 9 ALTITUDE INPUT 9 EQUIPMENT MOUNTING 10 ELECTRICAL CONNECTIONS 12 POWER 12 AVIONICS OUTPUTS 12 SERIAL INTERFACE 12 SPEAKER AND HEADPHONE OUTPUTS GX60 65 ONLY 13 MICROPHONE INPUTS GX60 65 ONLY 13 TRANSMIT KEY INPUT GX60 65 ONLY 13 INTERCOM SELECTOR SWITCH GX60 65 ONLY 13 REMOTE FLIP FLOP INPUT GX60 65 ONLY 13...

Page 6: ...HOOTING 41 CONTACTING THE FACTORY FOR ASSISTANCE 42 APPENDIX B PERIODIC MAINTENANCE 43 LITHIUM BATTERY REPLACEMENT 43 EQUIPMENT CALIBRATION 43 REFERENCE OSCILLATOR GX60 65 43 CLEANING THE FRONT PANEL 43 APPENDIX C ENVIRONMENTAL QUALIFICATIONS 45 APPENDIX D ACCESSORIES 47 FROM II MORROW 47 COMMERCIALLY AVAILABLE 50 APPENDIX E SERIAL INTERFACE SPECIFICATIONS 53 MOVING MAP OUTPUT 53 BINARY NEAREST LI...

Page 7: ...FIGURE 3 UNIT INSERTION CHECK 10 FIGURE 4 MOUNTING FRAME ASSEMBLY 11 FIGURE 5 CABLE ROUTING 11 FIGURE 6 REAR COAX CONNECTOR ASSEMBLY 15 FIGURE 7 TNC COAX CONNECTOR ASSEMBLY 15 FIGURE 8 GX50 60 POWER AND AVIONICS CONNECTIONS 16 FIGURE 9 APOLLO ACU TO APOLLO GX50 60 WIRING DIAGRAM 17 FIGURE 10 APOLLO ACU TO APOLLO GX65 WIRING DIAGRAM 18 FIGURE 11 CONNECTIONS WITH MD41 ANNUNCIATOR RELAY 19 FIGURE 12 ...

Page 8: ...Table of Contents iv Apollo GX50 60 65 Installation Manual NOTES ...

Page 9: ...o included in this section Includes installation and checkout procedures Includes complete specifications Includes limitations for the equipment and installation Includes troubleshooting information Includes periodic maintenance requirements Includes the environmental qualification form Includes information on accessories Includes serial data specifications APOLLO GX50 60 65 DESCRIPTION The Apollo...

Page 10: ...Introduction 2 Apollo GX50 60 65 Installation Manual Figure 1 GX50 Front Panel Figure 2 GX60 65 Front Panel ...

Page 11: ...afe altitude information Map Displays Full screen map with bearing distance to waypoint and zoom level Split screen map with distance speed bearing track crosstrack error To waypoint and zoom level Split screen with nav data and comm frequency display GX60 65 only Smart key 1 button map declutter Tri state On map waypoint selection for information direct to nomination Track up desired track up and...

Page 12: ...function Frequency memory and recall functions from navigation data base 10 last used 10 user stored Two microphone inputs 12 watt audio amplifier Remote flip flop input SYSTEM CONFIGURATIONS The GX50 60 65 can be installed in several configurations based upon individual requirements This includes VFR or IFR GPS navigation This section defines the minimum requirements VFR GPS NAVIGATION INSTALLATI...

Page 13: ...ch altitude input from an altitude encoder converter or air data computer The GX50 60 65 can also be connected to other external devices such as an autopilot a moving map display connected to an RS 232 serial output an SL40 VHF Comm radio connected to an RS 232 serial output For GX50 units Fuel Airdata Computer e g Shadin Model ADC 200 COMM TRANSCEIVER GX60 65 For standalone installations the comm...

Page 14: ...vices Subpart B Unintentional Radiators The Apollo GX50 60 65 software is designed and tested to RTCA DO 178B level C Note Unauthorized changes or modifications to the GX50 60 65 may void the compliance to regulatory agency requirements and authorization for continued equipment usage UNPACKING THE EQUIPMENT Carefully unpack the equipment Visually inspect the package contents for any evidence of sh...

Page 15: ... washer 8 8 8 224 0404 4 40 x 1 4 SS flat head Phillips machine screw 2 4 4 245 0022 Crimp contact for dsub 20 to 24 awg wire 37 52 52 310 5184 00 Mounting frame 1 1 1 310 5188 00 Connector mounting plate 1 1 1 998 0048 3 32 hex driver 1 1 1 Manual kits Part number 564 0064 4xx 6xx 8xx 560 0961 xx GX GPS User s Manual 1 1 1 560 0959 xx GX50 GX60 Installation Manual 1 1 1 560 0928 xx GX GPS Approac...

Page 16: ...a positioner are required to ensure consistent reliable crimp contact connections for the rear 15 and 37 pin d sub connectors These tools are available from Astro Tool Corp Phone 503 642 9853 21615 SW TV Highway Fax 503 591 7766 Beaverton OR 97006 Crimp tool Astro Tool part 615708 Positioner Astro Tool part 616356 LICENSE REQUIREMENTS An aircraft radio station license is required for operation of ...

Page 17: ...installing the mounting frame INSTALLATION CONSIDERATIONS MOUNTING CONSIDERATIONS The GX50 60 65 is designed to mount in the avionics stack in the aircraft instrument panel within easy view and reach of the pilot The standard package includes a mounting frame for ease of mounting connections and service of the unit Allow an additional one inch clearance to the rear of the mounting frame for connec...

Page 18: ...nd the d sub connectors on the back of the GX50 60 65 align with the mating connectors in the mounting tube then use the 3 32 hex tool to tighten clockwise the locking screw To remove the unit from the mounting frame use the hex tool and turn the locking screw counter clockwise The locking cam will push the unit out of the connectors Then pull the GX50 60 65 out of the mounting frame No special ex...

Page 19: ...Installation Apollo GX50 60 65 Installation Manual 11 Figure 4 Mounting Frame Assembly Figure 5 Cable Routing ...

Page 20: ...ts for CDI HSI indicators autopilot and annunciators These outputs are to be connected as appropriate for the particular installation The CDI HSI outputs may be connected to a dedicated CDI or HSI or to a shared indicator using an appropriate switching relay The avionics outputs available are listed in the Avionics Outputs specification on page 32 Connect the annunciator outputs to lamp indicators...

Page 21: ...is inhibited when the intercom function is selected REMOTE FLIP FLOP INPUT GX60 65 ONLY The GX60 65 includes a remote flip flop input This is an optional input that can be connected to a remote mounted such as on the yoke momentary push button switch which pulls the input low to ground ANTENNA INSTALLATION AND CONNECTIONS COMM ANTENNA GX60 65 ONLY The GX60 65 requires a standard 50Ω vertically pol...

Page 22: ...moving the antenna is not necessary Once the antenna mounting position has been prepared route the coax cable from the antenna to the GX50 60 65 Proper selection of coax cable and assembly of connectors is critical to GPS signal performance The cable loss from the antenna to the GX50 60 65 should be limited to a maximum of 4 dB Minimize the coax length for optimum performance and DO NOT coil exces...

Page 23: ...Installation Apollo GX50 60 65 Installation Manual 15 Figure 6 Rear Coax Connector Assembly Figure 7 TNC Coax Connector Assembly ...

Page 24: ...Installation 16 Apollo GX50 60 65 Installation Manual Figure 8 GX50 60 Power and Avionics Connections ...

Page 25: ...Valid ACTIVE APPROACH OBS HOLD MSG GPS SEQ Obs Hold PTK CDI L CDI R From To Nav Valid VDI Nav Valid CDI L CDI R GS Up From To Nav Valid GS Valid 26 14 15 20 21 32 42 8 12 9 10 13 11 30 31 18 19 24 25 29 16 17 22 28 34 35 Power Vcc Ground 78 1 15 33 34 16 26 17 14 13 11 12 10 29 40 VDI Dn VDI Up 30 31 28 36 37 GS Dn GS Valid GS Valid 33 38 39 GS Valid Nav Valid GS Dn 23 41 Dimmer High Dimmer Low 43...

Page 26: ...NAV Valid NAV Valid GS Up VDI Valid MSG PTK CDI L CDI R From To Nav Valid VDI Nav Valid CDI L CDI R GS Up From To Nav Valid GS Valid 26 14 15 20 21 32 42 10 11 30 31 18 19 24 25 29 16 17 22 28 34 35 Power Vcc Ground 78 1 16 17 14 13 11 12 10 29 40 VDI Dn VDI Up 30 31 28 36 37 GS Dn GS Valid GS Valid 33 38 39 GS Valid Nav Valid GS Dn 23 41 4 Dimmer High Dimmer Low 43 44 6 Lamp Test 5 NAV enable GPS...

Page 27: ...Installation Apollo GX50 60 65 Installation Manual 19 Figure 11 Connections with MD41 Annunciator Relay ...

Page 28: ...Installation 20 Apollo GX50 60 65 Installation Manual Figure 12 RS 232 Serial Connections ...

Page 29: ...Installation Apollo GX50 60 65 Installation Manual 21 Figure 13 GX60 65 Comm Wiring Diagram ...

Page 30: ...Installation 22 Apollo GX50 60 65 Installation Manual Figure 14 GX60 65 Typical Audio Panel Connections ...

Page 31: ...Installation Apollo GX50 60 65 Installation Manual 23 Figure 15 GX65 Power and Avionics Connections ...

Page 32: ...tputs Check the avionics output connections by using the test mode as follows Rotate the LARGE knob to select each test 1 Using the CDI TRIANGLE page rotate the SMALL knob to check left mid and right 2 Using the VDI TRIANGLE page rotate the SMALL knob to check down mid and up 3 Using the TO FROM FLAG page rotate the SMALL knob to check the Off To and From outputs 4 Using the LAMP OUTPUTS page rota...

Page 33: ...Turn the LARGE knob to the Mic 2 value Turn the SMALL knob to change the value 5 Press ENTER to accept and save the settings Receiver Squelch Preset the receiver squelch level for values from 25 100 1 In the Test Mode rotate the LARGE knob to select Receiver Squelch 2 Press SEL to activate selection The value will flash 3 Turn the SMALL knob to select a value 4 Press ENTER to accept and save the s...

Page 34: ...nce from the nav page display 1 Press the SYS button rotate the LARGE knob to display the SYSTEM INFO page and press ENTER 2 Press SEL rotate the LARGE knob to move the cursor to different fields rotate the SMALL knob to input the correct time and then press ENT to save the changes GPS Operation and Position This checkout is to be completed with the aircraft moved away from hangars and other struc...

Page 35: ... 65 Receiver Transmitter Operation Tune the unit to a local frequency and verify the receiver output produces a clear and understandable audio output Verify the transmitter functions properly by contacting another station and getting a report of reliable communications Check the remote flip flop Antenna Check The antenna VSWR can be checked using an inline wattmeter in the antenna coax using frequ...

Page 36: ...ayed 2 Check the database to ensure it is for the right coverage area and check the expiration date To check the database a Press SYS rotate the LARGE knob to the SYSTEM INFO page and press ENT b Rotate the LARGE knob to the Apollo GX SOFTWARE VERSION page c Rotate the SMALL knob to display the database information The database name expiration date and version will be displayed 3 Enter a direct to...

Page 37: ...TO FROM flag OFF TO FROM SAR Yes No N A External annunciators Serial Interface Configuration N A Valid flags _____________ ____________ Port 1 _____________ ____________ Port 2 GPS NAVIGATION CHECKOUT Seed position entered Interface Checks Time date entered N A RS 232 outputs checked GPS Operation N A RS 232 inputs checked Position check Signal reception check Interference from other avionics chec...

Page 38: ...dio transmit max at 90 modulation at 1000 Hz Input power GPS navigation input 7 watts typical Input power comm input 3 7 watts typical receive 28 watts typical transmit Internal fuses Nav input 3 amp fast blow surface mount on board Comm input 7 amp fast blow soldered in board Fuses must be replaced with the same or equivalent type contact the factory Memory backup Internal lithium battery with a ...

Page 39: ... is included in Appendix C Operating temperature 20 C to 55 C Storage temperature 55 C to 85 C Temperature variation 2 C per minute Humidity 95 at 50 C for 6 hours 2 day cycle Maximum altitude 55 000 feet Cooling Not required GPS RECEIVER PERFORMANCE Number of channels 8 Frequency 1575 42 MHz L1 C A code Sensitivity acquisition 135 dBm Sensitivity drop lock 142 dBm Dynamic range 20 dB Figure 16 Un...

Page 40: ...rive up to 200 ohm load Nav valid flag 300 mv for valid indication will drive up to 100 ohm load Nav superflag Vin 2 volts minimum for valid source capability of 400 mA VDI up down 150 mv full scale will drive up to 200 ohm load VDI valid flag 300 mv for valid indication will drive up to 100 ohm load VDI superflag Vin 2 volts minimum for valid source capability of 400 mA Annunciators Open collecto...

Page 41: ...put are included on pages 61 to 62 ANNUNCIATOR REQUIREMENTS The GX50 60 installed for IFR non precision approach operation requires the following annunciators upper annunciator pictured below Each annunciator should include a lamp of the proper voltage for the installation The lower annunciator is suitable for the GX65 Legend Color MSG amber PTK blue or white OBS HLD blue or white with included mo...

Page 42: ...erride COMM TRANSMITTER PERFORMANCE GX60 65 ONLY Class 4 Output power 8 watts minimum carrier at 12VDC input 6 watts minimum at 10VDC input transmit is locked out below 9 volts input Frequency range 118 000 to 136 975 MHz 760 channels Frequency tolerance 15ppm from 20 C to 70 C Microphone input Two inputs standard carbon or dynamic mic with integrated preamp providing minimum 70mV rms into 1000Ω l...

Page 43: ... hold input operation should be combined with the OBS HLD annunciator optional on GX65 Transmit key GX60 65 Input pulled low to ground to enable the transmitter Intercom select GX60 65 Input pulled low to ground to enable the intercom function Flip Flop GX60 65 Remote comm flip flop input connect to a momentary button to ground for remote flip flop operation ANTENNA REQUIREMENTS GPS ANTENNA The GX...

Page 44: ...1 I Power main DC power input 2 I Reserved do not connect 3 O Reserved do not connect 4 I TxKey transmit enable key pulled low to transmit 5 NC do not connect 6 O Speaker speaker terminal output 7 I Mic ground microphone input ground connection 8 I Mic 1 microphone input 1 9 I Power ground main power ground input 10 I Reserved do not connect 11 O Reserved do not connect 12 I Intercom select interc...

Page 45: ... Left output 15 O ACTIVE Approach Active annunciator output GX50 60 only 16 O MSG Message annunciator output 17 O PTK Parallel track annunciator output 18 reserved do not connect 19 reserved do not connect 20 O Serial ground RS 232 signal ground 21 I RxD2 RS 232 channel 2 serial data input 22 O TxD2 RS 232 channel 2 serial data output 23 reserved do not connect 24 O reserved do not connect 25 O Gr...

Page 46: ...Specifications 38 Apollo GX50 60 65 Installation Manual NOTES ...

Page 47: ...allations of the GX60 65 comm functions are to be made in accordance with AC 20 67B or other appropriate FAA approved guidelines When the GX50 60 65 is installed for VFR a placard stating GPS Limited to VFR Use Only or an FAA approved equivalent statement must be placed next to the primary indicator OPERATIONAL An approved Aircraft Flight Manual Supplement is required for IFR installations Note A ...

Page 48: ...Limitations 40 Apollo GX50 60 65 Installation Manual NOTES ...

Page 49: ...na Add a 1575 42 MHz notch filter in comm coax Fix or replace the comm Disconnect the ELT antenna coax to check GPS signal levels drop when avionics are turned on Noise interference from other avionics Turn all avionics off then turn on each piece one at a time to isolate the source of the interference Route cable and antenna away from sources of interference The GX60 65 does not transmit The TxKe...

Page 50: ...oblem check the electrical system CONTACTING THE FACTORY FOR ASSISTANCE If the Apollo GX50 60 65 unit fails to operate despite troubleshooting efforts contact the II Morrow factory for assistance II Morrow Inc 2345 Turner Rd SE Salem Oregon 97302 USA Phone 503 581 8101 or 1 800 525 6726 Be prepared with the following information about the installation Installation configuration accessories antenna...

Page 51: ...placed only with II Morrow part 148 1702 or a II Morrow approved equivalent Caution The battery may explode if mistreated Risk of fire explosion and burns Do not recharge disassemble heat above 100 C or incinerate Dispose of batteries promptly Keep away from children Be sure the battery is inserted in the right direction EQUIPMENT CALIBRATION The GX50 60 65 design requires very few adjustments or ...

Page 52: ...Periodic Maintenance 44 Apollo GX50 60 65 Installation Manual NOTES ...

Page 53: ... mounts to Categories B M N Explosion Proofness 9 0 Equipment identified as Category X no test required Waterproofness 10 0 Equipment identified as Category X no test required Fluids Susceptibility 11 0 Equipment identified as Category X no test required Sand and Dust 12 0 Equipment identified as Category X no test required Fungus Resistance 13 0 Equipment identified as Category X no test required...

Page 54: ...Environmental Qualifications 46 Apollo GX50 60 65 Installation Manual NOTES ...

Page 55: ... base It has a maximum altitude of 55 000 feet and weighs only 3 9 oz See the installation manual for the A 33 for complete specifications and installation instructions A 34 Antenna II Morrow Part 590 1112 Manufacturer Aero Antenna Manufacturer AT 575 93 The A 34 GPS antenna is an optional accessory item with the GX50 60 65 The A 34 includes a built in preamp and has a low profile low drag radome ...

Page 56: ...nsmitter in a residential or industrial environment is not permitted without an appropriate FCC license Annunciators These Apollo ACU annunciators provide the required annunciation for the GX50 60 for IFR en route terminal and non precision approach operation See the instructions provided with the annunciator module for complete specifications and installation instructions Apollo ACU GPS NAV Annun...

Page 57: ...PS PTK WPT SEQ OBS HLD APPRCH ACTIVE Momentary push button The following annunciator provides the required annunciation for the GX65 for IFR en route and terminal operation See the instructions provided with the annunciator module for complete specifications and installation instructions The annunciator should be connected to a suitable dimming circuit for night operation Audio Panel The Apollo SL...

Page 58: ... the equipment and to ensure proper operation is obtained Annunciator Relay Units To simplify installation several annunciator control units are available that combine the required annunciators switches and navigation source selection relays The MD41 Series GPS annunciator control unit from Mid Continent Instruments includes all required annunciation for the GX50 60 for non precision approach and ...

Page 59: ...GX50 60 65 can use altitude data from encoder or converter units that output information on an RS 232 serial interface Check for the altitude input requirements on page 33 The serial interface specifications required from the encoder or converter units are included in Appendix E Several altitude encoders compatible with the GX50 60 65 include Model AK 350 altitude reporter encoder and AK232C seria...

Page 60: ...x 316 683 1861 Wichita KS 67207 Avionics International Supply Inc Phone 214 248 2233 4389 Westgrove 800 553 2233 US Dallas TX 75248 Fax 214 250 2794 Northern Airborne Technology Phone 604 763 2232 1925 Kirshner Road Suite 14 Fax 604 762 3374 Kelowna B C Canada VIY 4N7 For altitude encoders and gray code converters Shadin Company Incorporated Phone 612 924 1141 6831 Oxford Street Fax 612 924 1111 S...

Page 61: ...ith SL40 comm data KEYPAD NONE Keypad data input KEYPAD MOVMAP Keypad data input moving map data output KEYPAD MAPCOM Keypad data input moving map data output with SL40 comm data FADC MOVMAP Fuel Airdata input moving map data output PC SETUP Used for factory test NONE MovMap Argus 3000 5000 7000 and Shadin Digiflow Miniflow Microflow MOVING MAP OUTPUT The format of the moving map data output is as...

Page 62: ...ed ddd knots E ddddd 5 Distance to active waypoint ddddd nm x 10 G sdddd 5 Cross track error s sign R for right L for left of course dddd distance off course hundredths of nm I dddd 4 Desired track magnetic dddd degrees x 10 K ddd dd 3 to 5 Active waypoint identifier ddd dd ASCII waypoint identifier L dddd 4 Bearing to active waypoint magnetic dddd degrees x 10 Q sddd 4 Magnetic variation s sign E...

Page 63: ...y a shorter record will be sent with the List Item Number set to 0xFF Table 7 Nearest Waypoint List Data Byte Format Description 1 Z Z Item Designator 2 sddddddd List Item Number Packed unsigned binary values s 1 End of list 0 all other ddddddd 1 20 list waypoint index sddddddd 0xFF List Type is EMPTY BYTE 4 terminate Item 3 t Waypoint Type t a airport v VOR n NDB i INT u USER 4 Cr r Item Terminat...

Page 64: ...ATOR OUTPUTS WHEN EXTENDED DATA IS ENABLED ONLY Table 8 Annunciator Output Data Id Item Format Len Description a eampht 6 Annunciator Flags e Approach Enabled off O on a Approach Active off O on B blink m Message off O on B blink p Parallel Track off O on h Hold off O on B blink t From To off T To F From c vDddd 5 CDI v Nav Flag Flagged v Valid D Needle C Center L Left R Right ddd Deflection Value...

Page 65: ...ifier 10 11 12 sddddddd xxmmmmmm xhhhhhhh Waypoint latitude packed unsigned binary s sign 0 for north 1 for south ddddddd degrees mmmmmm minutes hhhhhhh hundredths of minutes x undefined 13 14 15 16 sxxxxxxx dddddddd xxmmmmmm xhhhhhhh Waypoint longitude s sign 0 for east 1 for west dddddddd degrees mmmmmm minutes hhhhhhh hundredths of minutes x undefined 17 18 nnnnnnnn nnnnnnnn Magnetic variation ...

Page 66: ... v VOR n NDB i intersection u user p parallel track d direct to F FAF I IAF H MAHP A IFAF P undefined approach waypoint type Example Moving Map Data Output Extended Data Disabled AN 34 1570 34 15 70 latitude BW 118 4390 118 43 90 longitude C306 306 track angle D210 210 knots E02682 268 2nm to waypoint GR0006 0 6nm right of course I3059 305 9 desired track KSFO SFO waypoint ident L3058 305 8 bearin...

Page 67: ...t significant character first in the data message Airport Ident Output This message is used to output the selected airport ident Message Format PMRRC04tiiii chksum cr 04 message id Example Moving Map Data Output Extended Data Enabled AN 34 1570 34 15 70 latitude BW 118 4390 118 43 90 longitude C306 306 track angle D210 210 knots E02682 268 2nm to waypoint GR0006 0 6nm right of course I3059 305 9 d...

Page 68: ... frequency 9 DEP departure 2 ATS for ATIS 3Ah FSS flight service station 3 ATF air traffic frequency 3Bh RFS for remote flight service station 4 APP for approach 3Ch UNI for unicom 5 ARR for arrival 3Dh MF mandatory frequency 6 AWS automatic weather station 3Eh not defined do not use 7 CLR clearance delivery 3Fh undefined for other frequency types mk frequency m desired frequency in MHz in hexadec...

Page 69: ...ude in feet right justified with leading zeros 11 T ASCII T 054h 12 or Temperature sign ASCII or 02Bh or 02Dh 13 14 dd Internal altimeter temperature 15 16 dd Checksum of bytes 1 through 14 computed in hex output in ASCII format i e FA hex 17 CR ASCII carriage return 0Dh The altitude input can decode several status or error codes These codes would be in place of the altitude data in characters 5 1...

Page 70: ...at STX message message message chksum ETX STX ASCII start of text character STX 02h message starts with an ASCII S then an ID character followed by the message data a carriage return CR 0Dh and a line feed LF 0Ah See the following table checksum the message checksum same format as message ETX ASCII end of text character ETX 03h Altitude Sign Altitude in Feet Temperature Sign Example 1 Altitude Enc...

Page 71: ...degrees from true north SI ddd WSPD 7 Wind Speed in knots SJ sdd TURN 7 Rate of Turn in degrees second is right is left SK sddd VSPD 8 Vertical speed in tens of feet minute SL ddd HEAD 7 Heading 0 to 359 degrees from true north SM dddd RFF 8 Right Engine Fuel Flow in tenths of gallons hour SN ddddd RFU 9 Right Engine Fuel Used in tenths of gallons SO dddd LFF 8 Left Engine Fuel Flow in tenths of g...

Page 72: ... SG 03 3 C true air temp SH010 wind direction at 10 relative to true north SI015 wind speed at 15 knots SJ 03 3 second right turn SK 050 50 feet second vertical air speed SL359 359 heading relative to true north SM0123 12 3 gallons hour right engine fuel flow SN0300 30 0 gallons used right engine SO0131 13 1 gallons hour left engine fuel flow SP0310 31 0 gallons used left engine SQ000 no errors S ...

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