BENDIX/KING
KAP 140
Page 1--3
Revision 2, Dec/2002
CS:15574F02.IDU
Abbreviation Description
V
Volts
VDC
Volts -- DC (direct current)
VOR
VHF (Very High Frequency) Omni Range
VS
Vertical Speed
1.2 SYSTEM DESCRIPTION
1.2.1 GENERAL SYSTEM DESCRIPTION
The KAP 140 Automatic Flight Control System (AFCS) provides pilot workload relief when installed
in single--engine and light twin airplanes with non--pressurized cabins. The system is offered in
several upgradeable flavors for customer flexibility. This system can be configured as a Roll--only
(single--axis) system or as a Pitch and Roll (two--axis) system. The single--axis system has roll
stabilization with heading select and navigation arm and coupled modes. The two--axis systems
provide vertical speed select and altitude hold, with altitude alerting and preselect as an option.
Manual electric trim can be added to any system and pitch autotrim can be added to any two--axis
system.
1.2.2 SYSTEM UNITS AND INTERFACES
The KAP 140 autopilot system is composed of the KC 140 flight control computer, KCM 100
configuration module, KS 271 Roll Servo, KS 270C Pitch Servo, KS 272C Pitch Trim Servo, and
KM 275 or KM 277 servo mounts. The system receives a combined yaw rate and roll rate signal
from a turn coordinator (rate gyro). A VOR/ILS or GPS receiver can be interfaced to the AFCS
system via analog deviations and valids. AFCS systems with altitude alerting are interfaced to an
encoding altimeter via parallel digital inputs. A remote analog baro correction input is also provided
for interface to a KEA130A or equivalent altimeter. The system interfaces to a Directional Gyro
(DG) or HSI, receiving analog heading datum and/or course datum. The system also may interface
to the audio panel, flaps motor, and various switches on the control wheel (i.e. CWS, AP DISC,
MET).
Table 1--1 lists the components and part numbers that comprise the KAP 140 system. Figure 1--1
shows a block diagram of the system.
MODEL NO.
UNIT DESCRIPTION
PART NUMBER
KCM 100
Configuration Module
071--00073--xxxx
KC 140
Flight Computer
065--00176--xxxx
KEA 130A (Optional)
Encoding Altimeter
KS 270C
Pitch Servo Actuator
065--00178--xxxx
KS 271C
Roll Servo Actuator
065--00179--xxxx
KS 272C
Pitch Trim Servo Actuator
065--00180--xxxx
1394T100--xxRZ
Rate Gyro
Supplied by Mid--Continent
1U262--04x--x
Directional Gyro
Supplied by Sigma--Tek
TABLE 1--1 KAP 140 SYSTEM COMPONENTS AND SUPPORT EQUIPMENT
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