KNS 81


- Panel mounted navigation system consisting of VOR/Localizer receiver, RNAV computer, and glideslope receiver (basic model)
- Similar to KNS-80 navigation system but DOES NOT include DME section
- Models available WITHOUT glideslope receiver, with Special subdued pushbutton lighting where standard button lighting could provide a distraction problem, with shiny lens for high mounting angles or pedestal mount installations or non-glare lens for conventional installations , with optional communcations bus from the KNS-81 to the KGR-356 Radar Graphics system which provides visual indication of the waypoints in relation to the weather and the VORTAC , with black or grey bezel, will communication option which interfaces the KNS-81 with the KTU-709 TACAN allowing the KNS-81 to accept TACAN information. VOR.PAR mode is not available on TACAN units. The PAR nomenclature on the display is replaced with TAC nomenclature, with front panel with RFI shield, with helicopter option designed to provide increased immunity to rotor modulation interference, with 9 or 10 waypoint data storage
- Simultaneously displays waypoint parameters of frequency, radial and distance plus up to ten waypoints (TACAN version will also tune TACAN receiver and display TACAN channels & receiving radial information)
- 200-channel VOR/LOC receiver
- Digital RNAV computer with capability for preselection and storage of 4 VOR/LOC frequencies and/or complete RNAV waypoints
- 40-channel Glideslope receiver
- Provide OBI outputs for driving an RMI indicator such as KI-229 or KNI-582
- Will operate on any voltage from 11 to 33V
- Large Scale Integrated (LSI) circuits used which results in complete unit weighing only 5 lbs. with a low power consumption of 15W
- Automatic dimming circuit for display compensates for changes in ambient light level
- Can be interfaced to KN-63, KDM-706 DME units and KTU-709 TACAN
- Commonly used with KI-202 VOR indicator or KI-206 VOR/GS indicator but can be used with KNI-510/510/510B/520/525 or KPI-550A/551A/552/553/553A Navigation indicators, KI-525/525A HSI units, KDI-572/573/574 DME indicators
- No external dummy loads or programming jumpers are required for interfacing
- TSO'd
- Can be used in conjunction with KA-155 FM filter to achieve FM immunity for use in Europe
Specifications
DIMENSIONS |
6.31"W x 2.0"H x 11.48"L |
WEIGHT |
5lbs |
TEMPERATURE RANGE |
-20 to 55°C |
ALTITUDE RANGE |
up to 50 000 feet |
NAV FREQUENCY RANGE |
200 channels, 108.00 to 117.95 with 50kHz spacing |
NAV SENSITIVITY |
2uV Max. (hard) will provide a flyable course indication |
NAV SELECTIVITY |
6dB at about 16kHz min, 80dB at about 42.0kHz |
DEFLECTION SENSITIVITY (NAV) |
10 deg difference between reference and variable phases shall produce a 150uA deflection |
VOR ACCURACY |
Typically less than 0.6 deg. error |
CROSS TRACK ACCURACY (RNAV) |
Less than 0.2nm error contribution to CDI Left/Right needle signal |
ALONG TRACK ACCURACY (RNAV) |
Less than 0.2nm error contribution in distance to waypoint signal |
GS FREQUENCY RANGE |
40 channel, 329.15 to 335.00MHz with 150kHz spacing |
GS SENSITIVITY |
Requires input signal of 10uV or less for 60% of standard deflection |
GS SELECTIVITY |
more than 6dB at about 21KHz, more than 60dB at about 129KHz |
COURSE DEVIATION LOADS |
0 to 5kOhm loads, about 150uA full scale |
VOR/LOC/RNAV FALG LOADS |
0 to 5kOhm loads, 260uA for flag out of view |
TO/FROM LOADS |
3 to 200 ohm loads, digital, current limited 600 to 800uA |
INDICATORS (INTERFACES) |
Indicators using a 30Hz Omni-Range-Zeroed resolver |
DEVIATION LOADS (GS) |
0 to 3kohm loads, about 150uA full scale deflection |
FLAG LOADS (GS) |
0 to 3kohm loads, 190uA half flag, 260uA flag out of view |
REFERENCE DOCUMENTS (VOR) |
FAA TSO C40a Class1, RTCA DO-153A |
REFERENCE DOCUMENTS (LOC) |
FAA TSO C36c Class D CAT II, RTCA DO-131A |
REFERENCE DOCUMENTS (GS) |
FAA TSO C34c Class D CAT II, RTCA DO-132A |
ENVIRONMENTAL CATEGORIES |
ASKPABABA |
REFERENCE DOCUMENTS |
Environmental: RTCA DO-160 |
PART NUMBER | DESCRIPTION |
066-4010-10 |
Non-glare lens, with glideslope, black panel, 10 waypoints |
066-4010-30 |
Non-glare lens, with glideslope, black panel, TACAN version, 10 waypoints |
066-4010-62 |
Non-glare lens, waypoint nav. bus, with glideslope, black panel, helicopter option, 10 waypoints |