Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/APN-102
0.3% plus 1.5 knots.
RELATION TO SIMILAR EQUIPMENT
Drift Angle: Probable error less than 0.25 deg
The AN/APN-102 is a smaller version of the
Input Power Requirements: 115v ac, single
AN/APN-81.
ph, 400 cycles, 500 va; 28v dc, 3 amp
TECHNICAL DESCRIPTION
Frequency Output: 8800 plus or minus 30 mc
Outputs
Power Output: 10w avg
Groundspeed
Range, Max: 70,000 ft
Visual: Displayed in indicator.
Range, Min: 200 ft
Electrical: Synchro output with scale factor
Duty Cycle: 0.25
of 36 deg of shaft rotation per 100 knots
Environmental Limitations: All components, -55 deg
of ground-speed. 10K potentiometer
C to plus 71 deg C
output. Scale factor 360 deg per 100
Pulse Width: 1.5 usec above 35,000 ft varied
knots.
2.5K potentiometer output.
continuously between 1.04 and 3.13 usec below
Scale factor 360 deg per 100 knots.
35,000 ft.
Drift Angle
Pulse Repetition Frequency: 55 kc above 35,000 ft.
Visual: Displayed on indicator.
Varied continuously between 80 and 240 kc
Electrical: Synchro differential output with
below 35,000 ft.
scale factor of one deg of shaft rotation
INSTALLATION CONSIDERATIONS
per deg of drift angle.
The Receiver Transmitter and computer require an
Limits of Operation
external flow of cooling air for proper operation. Forced
Groundspeed: Min 70 knots, max 939 knots.
air must be supplied to these units through air ducts
Drift Angle: Min 0 deg, max 35 deg
located on the units. Interconnecting cabling between
Altitude: Min 200 ft, max 70,000 ft
units of the AN/APN-102 have to be fabricated for the
Pitch Stabilization: Max plus or minus 10 deg
particular installation.
Accuracy
Groundspeed: Probable error less than
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
Receiver-Transmitter
1
12-1/4
18-7/8
23-3/4
39 3/4
RT-395/APN-102
Mounting MT- 2148/APN-102
1
9-3/4
19 -1/4
22-1,/4
2-3/4
Computer, Frequency Tracker
1
8-9/32
10-1/8
23-1/32
44
CP-335/APN-102
Mounting MT-1754/APN-102
1
9-3/8
11-1/8
25-1/4
3-5/8
Control, Radar Set
1
1-7/8
5-3/4
3-51/64
7/8
C-2047/APN-102
Indicator, Drift Speed
1
3-1/4
3-1/4
7-13/32
3-9 /16
ID-581/APN-102
Interconnecting Box
1
5--1/16
4-15/16
5-13/32
1-9/16
J-856/APN-102
Mounting MT-2147/APN-102
1
15/32
4-15/16
5
3/16
REFERENCE DATA AND LITERATURE
Technical Orders: Specifications:
12P5-2APN102-2
USAF Exhibit WCLG-8
12P5-2APN102-3
MIL-R-27234
12P5-2APN102-4
AN/APN-102: 2
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