INSTALLATION MANUAL AND OPERATING INSTRUCTIONS 3300
Contents
1. 5 1 3 Gyro Warning Flag 5 1 4 Specifications 5 Section 2 Installation 7 2 1 General 7 2 2 Pre Installation Inspection 7 2 3 Parts 8 2 3 1 Included Parts 8 2 3 2 Installer Supplied Parts 8 2 4 Equipment Location 8 2 5 Installation 8 2 6 Continued Airworthiness 9 Section 3 Operation 11 3 1 General 11 3 2 Starting Procedures 11 3 3 In Flight Procedures 11 3 4 Equipment Limitations 11 Figures 11 Typical Directional Gyro Display Detail 6 2 1 Outline Drawing 10 2 2 Panel Cutout Dimensions 10 Tables 1 1 Physical Characteristics 5 1 2 Performance 6 2 1 Connector Pin Callout 10 ndices A DO 160E Environmental Qualification Form 12 Manual Number 9016481 Page 3 of 12 Mid Continent Instruments Wichita KS Revision Detail ECO Rev Date Detail A 1 25 07 Initial Release Rev A January 25 2007 Manual Number 9016481 Page 4 of 12 Mid Continent Instruments Wichita KS Section 1 General Description 1 1 Purpose of Equipment The Model 3300 Directional Gyro DG is a gyroscopic directional indicator This short term directional reference is used in conjunction with a magnetic compass The directional gyro excels in providing a direction indication during maneuvers when the magnetic compass develops errors 1 2 Physical and Functional Description The 3300 Directional Gyro incorporates a spinning mass rotor This rotor is gimbaled so the rotor is free to move in all directions The rotor housed i2. knob in until it is seated E Apply the correct input power to the gyro F The Warning Flag shall be out of view within 5 minutes of startup G Verify that the caging shaft is not rubbing on the panel which can cause the knob to stick 2 6 Continued Airworthiness No periodic scheduled maintenance or calibration is necessary for continued airworthiness of the 3300 series Directional Gyro If the unit fails to perform to specifications it must be removed and serviced by a qualified service facility Rev A January 25 2007 Manual Number 9016481 Page 9 of 12 Mid Continent Instruments Wichita KS Figure 2 1 Outline Drawing 6 32UNC 2B holes on 3 500 BC 3 ples Screw depth into bezel 75 max Caging Knob Connector MS3112E8 4P 95 32 on 3 500 BC 3 ples 03 150 Cutout Connector MS3112E8 4P Ground DC 10VDC to 32VDC Input 10VDC to 32VDC Input Reserved Supply power to pin B or C pins B amp C internally connected O D gt Table 2 1 Connector Pin Callout 0 250 on 1 03 500 BC Figure 2 2 Panel Cutout Dimensions Rev A January 25 2007 Manual Number 9016481 Page 10 of 12 Mid Continent Instruments Wichita KS Section 3 Operation 3 1 General This section describes the Model 3300 Directional Gyro DG operating procedures The DG is required to be installed in an aircraft with the specified inputs applied Figure 1 1 provides an illustratio
3. Damage Inspect the shipping container and directional gyro for any signs of damage sustained in transit If necessary return the directional gyro to the factory using the original shipping container and packing materials File any claim for damages with the carrier Rev A January 25 2007 Manual Number 9016481 Page 7 of 12 Mid Continent Instruments Wichita KS 2 3 Parts 2 3 1 Included Parts A Model 3300 Directional Gyro B Mating Connector MS3116F8 4S or equivalent P N 9015514 C Installation Manual P N 9016481 2 3 2 Installer Supplied Parts A Mounting Screw 6 32UNC 2A Three 3 required 3 4 long screws are suggested for panel thickness between 0 05 and 0 19 but may not be optimum in some installations The installer will need to determine what is correct for a particular installation CAUTION Do not exceed 0 75 screw depth into bezel 2 4 Equipment Location The directional gyro should be located within the aircraft in accordance with the following considerations A The gyro is ideally located in the instrument panel directly within the pilot s normal line of sight The PUSH knob should be within easy reach Installations that result in viewing angles in excess of 30 degrees may reduce display readability B Compare the space requirements of the gyro with the installation area being considered C The power cable should not run adjacent to heaters engine exhausts or other heat sources Also
4. MID CONTINENT INSTRUMENTS INSTALLATI ON MANUAL AND OPERATI NG I NSTRUCTI ONS 3300 Series Directional Gyro MID CONTINENT INST CO INC MANUAL NUMBER 9016481 9400 E 34 Street N Wichita KS 67226 USA Rev A January 25 2007 Phone 316 630 0101 e Fax 316 630 0723 Mid Continent Instruments Wichita KS FOREWORD This manual provides information intended for use by persons who in accordance with current regulatory requirements are qualified to install this equipment If further information is required please contact Mid Continent Instruments Attn Customer Service Dept 9400 E 34 ST North Wichita KS 67226 USA Phone 316 630 0101 Fax 316 630 0723 We welcome your comments concerning this manual Although every effort has been made to keep it free of errors some may occur When reporting a specific problem please describe it briefly and include the manual part number the paragraph figure table number and the page number Send your comments to Mid Continent nstruments Attn Technical Publications 9400 E 34 ST North Wichita KS 67226 USA Phone 316 630 0101 Fax 316 630 0723 infol mcico com www mcico com Copyright 2005 Mid Continent Instrument Co Inc Rev A January 25 2007 Manual Number 9016481 Page 2 of 12 Rev A January 25 2007 Mid Continent Instruments Wichita KS Table of Contents Page Section 1 General Description 5 1 1 Purpose of Equipment 5 1 2 Physical and Functional Description
5. ST BE OBSERVED A Ahigh failure rate for gyroscopes can be directly related to rough or improper handling Gyros are delicate and cannot withstand the shock of being dropped jarred or struck by pieces of equipment Do not place gyros on any hard surface Pad with generous foam Handle like eggs B To prevent damage to a gyro the instrument should be transported to and from the aircraft in its original shipping container If this is impractical the gyro should be hand carried carefully in an upright position C A gyro should never be removed while it is spinning or running down The instrument normally operates at high RPM and may take 10 minutes or longer to run down If it is removed while running and tilted more than 20 degrees the gyro can develop a gimbal lock The gimbal will tumble and start to spin If gimbal lock occurs while the rotor is turning the gimbal may spin fast enough to damage the gimbal bearings requiring overhaul D A malfunctioning gyro should be handled with the same care given a new instrument Most malfunctioning instruments can be repaired and returned to service Using proper handling procedures during removal prevents additional damage and helps ensure possible reuse 2 2 Pre installation Inspection A Unpacking Carefully remove the directional gyro from shipping container The shipping container and packing materials should be retained for use should the gyro require future shipment B Inspect for
6. ber 9016481 Page 11 of 12 Mid Continent Instruments Wichita KS Appendix A DO 160 Environmental Qualification Form NOMENCLATURE Directional Gyro MODEL NUMBER 3300 XX Series TSO NUMBER C5e MANUFACTURERS SPECI FI CATI ONS Minimum Performance Specification Directional Gyro 3300 xx TS336 Rev 1 23 07 MANUFACTURER Mid Continent Instrument Co Inc ADDRESS 9400 E 34 St North Wichita KS 67226 USA REVISION AND CHANGE NUMBER OF DO 160 Rev E dated 12 9 04 DATES TESTED 11 06 1 07 CONDI TI ONS SECTI ON DESCRIPTION OF TEST Temperature and Altitude Equipment tested to Category D1 Survival Low Temperature 5 Survival Low Temp 65 C Operating Low Temperature D Operating Low Temp 40 C 5 0 7 0 Equipment tested to Category E Safet Type 5 All Fixed Wing and Helicopter Fluids Susceptibilit Voltage Spike Equipment tested to Category A Audio Frequency Conducted Equipment tested to Category Z Susceptibility Power Inputs Radiated and Conducted Tested for radiated susceptibility to Category W Energ Lightning Induced Transient Equipment tested to Susceptibility Pin Test Waveform A Level 3 Cable Bundle Test Waveform C Level 3 Multiple Burst no test performed X A3C3X Rev A January 25 2007 Manual Number 9016481 Page 12 of 12
7. hes long maximum 3 28 inches high maximum 3 28 inches wide maximum Mating Connector MS3116F8 4S or equivalent MCI P N 9015514 Cover Glass HEA anti reflective coated Instrument Mounting Rear panel mount Table 1 1 Rev A January 25 2007 Manual Number 9016481 Page 5 of 12 Mid Continent Instruments Wichita KS Performance Reliabilit 2500 Hour Mean Time Between Failure MTBF Caging and Heading The PUSH knob will erect the gyroscope to case horizontal and Set Knob engage the gear mechanism to set the heading position Drift Rate When the gyro is mounted to a rotating scorsby test stand tilted to 3 degrees and set at 5 to 7 oscillations per minute the drift shall be less than 4 in 10 minutes Warning Flag A gyro warning circuit provides for continuous monitoring of input voltage and rotor speed If either of these is insufficient the red warning flag will appear Operating Angle Limit Heading No Limit 360 Pitch and Roll 55 all headings Power Rating Starting Will not exceed 1 4A at 14 VDC Will not exceed 0 6A at 28 VDC Running 0 37 0 51 at 14 VDC 0 18 0 25 at 28 VDC Table 1 2 Warning Flag Symbolic Airplane Caging and Heading Set Knob Warning Flag On startup the warning flag will show until the input voltage and rotor speed are sufficient for proper operation If either of these becomes insufficient the warning flag will come into v
8. iew Symbolic Airplane The symbolic airplane serves as a heading reference indicator The point at the nose indicates the precise heading Index Marks Caging and Heading Set Knob The index marks at 45 degree increments are provided for heading reference Pushing this knob will erect the gyroscope for proper operation When the knob is pushed and turned the heading indication can be adjusted Typical Directional Gyro Display Figure 1 1 Rev A January 25 2007 Manual Number 9016481 Page 6 of 12 Mid Continent Instruments Wichita KS Section 2 Installation 2 1 General This section contains mounting electrical connections and other information required for installation After installation of cabling and before installation of the equipment ensure that power is applied only to the pins specified in the Table 2 1 Connector Pin Callout The conditions and tests required for the TSO approval of this article are minimum performance standards It is the responsibility of those installing this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO standards TSO articles must have a separate approval installation in an aircraft The article may be installed only if performed under 14 CFR Part 43 or the applicable airworthiness requirements CAUTION GYROS ARE DELICATE INSTRUMENTS THE FOLLOWING PRECAUTIONS MU
9. n of a typical Model 3300 display and a table describing the directional gyro s functions 3 2 Starting Procedures The following operational procedures are recommended when preparing the gyro for use NOTE Instrument may be momentarily caged by pushing the PUSH knob Hold the knob until the display stabilizes and then allow the knob to return to the normal position A Apply power to the directional gyro After a few minutes the red warning flag will pull out of view indicating the gyro is near full rotor speed B Push and hold the caging knob momentarily to make sure the rotor is aligned for optimum operation C Before takeoff set the heading to agree with the magnetic compass This is accomplished by pushing in the caging knob completely then rotating either direction to the heading indicated on the compass 3 3 In Flight Procedures A During straight and level flight the directional gyro will drift and should be reset to the magnetic compass The directional gyro should always be reset before performing maneuvers of any kind During maneuvers the directional gyro will provide more accurate bearing information than a standard magnetic compass 3 4 Equipment Limitations The 3300 series Directional Gyro is not to be used as a reference for aerobatic flight It is recommended to turn off the Directional Gyro red flag showing at least 10 minutes before aerobatic maneuvers are initiated Rev A January 25 2007 Manual Num
10. n the inner gimbal incorporates an air erection mechanism to keep the rotor spin axis perpendicular to the outer gimbal for optimum performance The outer gimbal is linked with a precision gear drive mechanism to the display dial The dial has five degree graduations with numerals every thirty degrees Every ninety degrees is a cardinal reference letter N E S W The display glass has a symbolic airplane for quick heading reference as well as index marks every 45 degrees The Push To Cage knob brings the inner gimbal to level position which is used primarily for startup This Push To Cage knob is also used to set the heading to agree with the magnetic compass When the rotor speed is too low for proper operation or if the unit is not receiving sufficient power a warning flag drops into view The directional gyro requires 10 to 32 VDC input voltage 1 3 Gyro Warning Flag A power warning circuit monitors rotor speed as well as the input voltage Valid rotor speed is determined as 70 of full speed and represents the minimum requirement for full functionality of the unit If either rotor speed or input voltage is insufficient the gyro warning flag comes into view 1 4 Specifications Physical Characteristics Qualification FAA TSO C5e Environmental Qualification RTCA DO 160E Environmental Category DIC2AER B1 XXXXXXZZAZ ZC WW M A3C3X XXAX Weight 1 9 Ibs Dimensions Length behind panel not including connector 4 65 inc
11. take care to route and tie the cable away from aircraft controls and cables 2 5 Installation Install the Directional Gyro in accordance with the aircraft manufacturer s instructions and the following steps A Referto Figure 2 1 and Table 2 1 for installation dimensions and electrical information The recommended circuit breaker size is 2A The minimum wire size is 22 AWG B Ensure the available instrument panel cutout meets the requirements of the gyro See Fig 2 2 for details C Attach aircraft electrical system cable to the instrument s connector per connector pin callout on Table 2 1 and insert the gyro into the instrument panel cutout As indicated on the connector pin callout either pin B or C may be used for power input The pins are connected internally and are provided for ease of installation There is NO need to apply power to both pins B and C Rev A January 25 2007 Manual Number 9016481 Page 8 of 12 Mid Continent Instruments Wichita KS D Secure the gyro to the instrument panel using the screw sizes called out in the mounting instructions Length of screws will be determined by aircraft instrument panel thickness The aircraft manufacturer or the installation facility is responsible for supplying appropriate installation hardware For ease of installation the caging knob may be removed This is accomplished without tools by pulling straight out To reinstall the knob align the flats on the knob and shaft and push the
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